211 results about "Optical microcavity" patented technology

The invention discloses a full-locking integrated microcavity optical comb based on coherent population trapping spectral lines, and belongs to the technical field of integrated microcavity optical combs. The full-locking integrated micro-cavity optical comb comprises a laser generation module, a frequency reference subsystem and a micro-cavity optical comb system. The laser generation module is used for generating two paths of laser, the frequency reference subsystem modulates one path of laser, a modulated optical signal is emitted into the atomic gas chamber system, and after transmission light is demodulated and subjected to phase-locked amplification processing, an optical frequency signal and a microwave signal which are locked to an atomic spectral line are obtained; and the optical frequency signal is fed back to the laser generating module to realize optical frequency locking. And the microcavity optical comb system adopts a microwave signal generated by the frequency reference subsystem as a frequency reference, and modulates the other path of laser to serve as pump light to enter the optical microcavity, so that optical comb output of a soliton state in the optical microcavity is realized. According to the invention, a single quantum system is taken as a reference, the problem of full locking of the micro-cavity optical frequency comb is effectively solved, and the system integration degree is relatively high.

Methods for detecting diffusing particles are provided which comprise introducing a sample comprising a diffusing particle to an optical microcavity; coupling probe light into the optical microcavity such that the probe light is in resonance with the optical microcavity, wherein the diffusing particle diffuses into an optical mode volume defined by the coupled probe light; and detecting output light from the optical microcavity as a function of time while maintaining resonance, wherein the diffusing particle generates a change the detected output light. Systems for carrying out the methods are also provided.

The invention discloses an organic light-emitting device and a light-emitting device, one side of the organic light-emitting device close to an anode is provided with two hole transport layers which are arranged according to a high-low refractive index relationship, the material of the first hole transport layer is as shown in a formula 1, and the material of the second hole transport layer is as shown in a formula 2. According to the organic light-emitting device and the light-emitting device, through matching optimization of device film layer materials and structural combination of film layers with different refractive indexes, the stability of the materials and transmission of current carriers are guaranteed, meanwhile, light field distribution is improved through optimization of an optical microcavity structure, the photon extraction efficiency of the device is improved, and the light-emitting efficiency of the device is improved. The ineffective loss of photon energy in the organic layer is reduced, so that the performance of the organic light-emitting device and the light-emitting device comprising the organic light-emitting device is improved in the aspects of light-emitting efficiency, starting voltage, light-emitting service life and the like. Formula 1 and Formula 2.

The invention relates to the technical field of electroluminescence, and discloses a laminated organic light-emitting device and application thereof, and the laminated organic light-emitting device comprises an anode layer, a first light-emitting unit, an electron transport layer, an interface modification layer, a connection layer, a second light-emitting unit and a cathode layer which are sequentially arranged from bottom to top; the electron transport layer comprises a hole blocking layer and an n-type electron transport layer; wherein the n-type electron transport layer is composed of an n-type dopant and an organic electron transport material, has the functions of electron transport, charge separation and injection and regulation and control of the optical microcavity effect of the laminated device, can simplify the electron transport and connection layer structure of the laminated device, and effectively improves the conductivity of the laminated device; according to the laminated organic light-emitting device, the voltage drop of the body is obviously reduced, and the interface electron injection barrier is reduced, so that the laminated organic light-emitting device has the advantages of low driving voltage, high efficiency and long service life, and the effect of adjusting the optical microcavity of the device can be achieved by utilizing the n-type electron transport layer.

A continuous-wave perovskite polariton laser device, including an optical microcavity, a spacer layer, and a gain medium. The gain medium is a perovskite material or a composite material containing perovskite, in a form of thin film, microcrystal, phosphor, nanocrystal, quantum dot, or single crystal. The perovskite gain medium is prepared by solution process or vacuum deposition technique, and is combined with an optical resonator. By exploiting the strong interaction between excitons and photons, a steady-state exciton-polariton condensation is formed, enabling the generation of continuous-wave polariton laser emission with a low threshold. The laser device can achieve low-threshold continuous-wave or pulsed lasing emission at room temperature under various light sources pumping or electrical excitation. Its threshold is 1 to 3 orders of magnitude lower than that of conventional semiconductor lasers, with an optimized threshold as low as 0.1 to 1 W / cm2, representing a novel ultralow-power coherent light source technology.

The invention discloses a cavity enhanced Fabry-Perot interference resonant cavity, and belongs to the technical field of sensing detection. The transduction film is used as a transduction medium, vibration is generated through induction, signals are converted into vibration of the film, optical signals are modulated, and information to be measured can be obtained. According to the invention, the cavity enhancement structure is introduced, the optical fiber collimator and the transduction film jointly form an interference resonant cavity, and the phase sensitization of the optical microcavity is realized by improving the reflectivity of the cavity and prolonging the time of capturing light. Through stable interference of the resonant cavity, strong optical constraint is generated, and interaction between a light beam and a transmission signal is enhanced. In addition to the characteristics of high sensitivity, small loss, small size and high integration, the device has high expandability in the design aspects of bandwidth and sensitivity, and good sensing performance and design flexibility of the device provide a new opportunity for propelling the military and civil fields such as monitoring technology and biomedicine.

The invention relates to the technical field of optoelectronic devices, in particular to an optoelectronic device based on single-molecule chiral double free radicals and a preparation method thereof.The optoelectronic device comprises an optical microcavity and a light-emitting core unit, and the light-emitting core unit is arranged in the optical microcavity; wherein the optical microcavity comprises a first reflection layer, a transparent spacing layer and a second reflection layer which are longitudinally arranged in sequence; a gap is formed between the multilayer dielectric first reflecting layer and the transparent spacing layer, and the second reflecting layer is stacked on the transparent spacing layer; and the light-emitting core unit is arranged between the multilayer medium first reflecting layer and the transparent spacing layer and is used for realizing electro-circularly polarized light emission. According to the design, circularly polarized light generated by the light-emitting core unit in the optical microcavity is reflected for multiple times and effectively propagated, so that regulation and enhancement of circularly polarized light emission are realized, and the stability of a photoelectronic device is effectively ensured.

The invention discloses a narrow-linewidth double-frequency laser generation method, and belongs to the technical field of microwave photons. Two paths of optical signals generated by two semiconductor lasers with different wavelengths are injected into the same optical microcavity, the two paths of optical signals enter a self-injection locking state in different modes of the optical microcavity, and the optical microcavity can output narrow-linewidth double-frequency laser. The invention further discloses a narrow-linewidth double-frequency laser generating device and a photo-production microwave method and device. Two double-frequency lasers with different frequencies are locked on one optical microcavity through an original double-self-injection locking technology, the problem of phase noise of a double-frequency light source is effectively solved while the linewidth of the input laser is narrowed, common-mode noise caused by mode difference of the two lasers in a locking state is eliminated, and the dual-frequency light source has the advantages of being simple in structure and convenient to operate. And the traditional servo locking technology is not needed, so that the complexity of the system is simplified.

The invention discloses a PUF (Physical Unclonable Function) device based on an integrated optical microcavity and an encryption method thereof. The PUF device comprises a chip substrate; the chip lower cladding covers the surface of the chip substrate, and the input coupling grating, the trunk input waveguide and the optical microcavity at least comprise one form are arranged on the surface of the chip lower cladding; the nano scatterer is arranged in the optical microcavity; and a light excitation and acquisition assembly. According to the encryption method, two feature extraction schemes are provided based on scattering imaging, so that the secret key is convenient to expand. One method is a spectrum method obtained by extracting information based on a scattered spectrum excited by a device in a certain wave band range; one method is an image method for extracting information based on a specific wave band microcavity vertical surface scattering image. According to the image method, information extracted from a two-dimensional area of a light field serves as an additional multiplexing means to enrich a random source of a device, and the safety of the system can be improved. The invention provides the PUF device which is reliable, low in cost and capable of being manufactured in a large scale and the encryption method of the PUF device.

The invention provides a method and a system for realizing a weak measurement enhanced chip-level microcavity gyroscope. The method comprises the following steps of: 1, providing a coherent state input by a system by using a single-frequency laser; 2, the output of the single-frequency laser is switched between a first path and a second path through an optical switch, the laser beam is transmitted to the first path in the first half part of the period, and the laser beam is transmitted to the second path in the second half part of the period; 3, the light transmitted along the first path and the second path respectively passes through an optical resonant cavity to sense the rotation angular speed, and a weak value amplification effect is achieved by setting front and back selection states; and step 4, weak measurement enhanced output results transmitted along the first path and the second path are respectively received by a photoelectric detector, and the value of the rotation angular velocity is demodulated according to the obtained output results. According to the invention, the optical microcavity is used as a sensing unit of the gyroscope, the sensing performance of the integrated optical gyroscope is greatly enhanced through a weak measurement technology, and the whole set of system can realize chip-level integration.

The invention discloses a multi-parameter parallel detection method based on a single whispering gallery optical microcavity, which belongs to the field of whispering gallery microcavities; the method comprises: the two ends of an optical polarization controller are respectively connected to a laser and a whispering gallery microcavity sensor, the whispering gallery microcavity sensor is connected to multiple target parameter information disturbance devices, and a photodetector; the laser outputs an optical signal, which is adjusted to the maximum coupling efficiency by the optical polarization controller and then output to the whispering gallery microcavity sensor, and the target parameter information disturbance device is adjusted to disturb the optical signal by the target parameter, and the disturbed optical signal is output to an oscilloscope through the photodetector, which is reflected as n resonance mode offsets, and the changes of n target parameters are calculated by a signal processing method combining n offsets with an n-order sensor matrix, thereby realizing the multi-parameter parallel detection of the whispering gallery optical microcavity. The invention can realize high-precision decoupling and parallel detection of multiple parameters.

The invention provides a light-emitting device and a display device, the light-emitting device comprises at least two light-emitting diodes emitting light of different colors, each light-emitting diode is provided with an optical microcavity, and each light-emitting diode comprises an anode layer, a light-emitting layer and a cathode layer which are stacked in sequence; wherein the optical path order of the optical microcavity corresponding to at least one light emitting diode is 1; and / or, an optical path adjusting layer is arranged in the optical microcavity corresponding to at least one light emitting diode, and the optical path adjusting layer is located in the film layer stacking structure of at least one of the anode layer and the cathode layer. The light-emitting device and the display device provided by the invention can meet higher requirements on the light-emitting device.

The utility model discloses a quantum dot light emitting diode, a display substrate and a display device. The quantum dot light-emitting diode comprises a first electrode, a second electrode, and a quantum dot light-emitting layer, a first electron transport layer and a second electron transport layer which are arranged between the first electrode and the second electrode, wherein the first electron transport layer and the second electron transport layer are sequentially arranged on one side, close to the second electrode, of the quantum dot light-emitting layer; wherein the first electron transport layer and the second electron transport layer are made of inorganic nanoparticles, the conduction band bottom energy level of the first electron transport layer is matched with the conduction band bottom energy level of the quantum dot light-emitting layer, and the conduction band bottom energy level of the second electron transport layer is larger than the work function of the second electrode and smaller than the conduction band bottom energy level of the first electron transport layer; the carrier mobility of the second electron transport layer is greater than that of the first electron transport layer, and the second electron transport layer is configured to adjust the length of the optical microcavity between the first electrode and the second electrode.

The invention relates to a photoacoustic gas sensing probe and an optical detection system. The photoacoustic gas sensing probe comprises a ceramic packaging sleeve; a gas exchange channel is arranged on the side wall of the ceramic packaging sleeve; the single-mode optical fiber is used for transmitting incident light and receiving reflected light; the end face of one end of the single-mode optical fiber is coated to form an optical fiber end face coating layer; at least part of the single-mode optical fiber is arranged in the ceramic packaging sleeve in a nested mode, and the optical fiber end face coating layer is located in the ceramic packaging sleeve. The elastic reflecting film is used for generating deformation in response to sound pressure or a photoacoustic signal; the elastic reflecting film is arranged at one end of the ceramic packaging sleeve and is opposite to the optical fiber end face coating layer, so that an optical microcavity is formed between the optical fiber end face coating layer and the elastic reflecting film; wherein to-be-detected gas enters the optical microcavity through the gas exchange channel. According to the invention, integration and high sensitivity of gas detection and acoustic signal detection can be realized, so that the detection effect is improved.

The invention relates to the field of microcavity photonics and the technical field of control, and provides a temperature locking method and device based on an optical microcavity absorption peak position, and the method comprises the steps: employing a tunable laser to output continuous light, and obtaining a transmission spectrum power curve; manually adjusting the output wavelength of the tunable laser, and recording the wavelength interval as a rough absorption peak position when a wave band with significantly reduced transmission spectrum power is detected; automatically adjusting the output wavelength of the tunable laser, and continuously scanning in the rough wavelength interval of the absorption peak position to obtain the absorption peak position; the offset between the position of the absorption peak and the position of a target absorption peak of the optical microcavity in a natural room temperature state is calculated, and the detected position of the absorption peak is stably maintained at the position of the target absorption peak by automatically heating or refrigerating the optical microcavity. Through the method, the problems of heat conduction path delay and thermal field gradient between the microcavity and the sensor are avoided, and the response speed and precision of wavelength drift compensation are improved.

The invention provides an optical waveguide microcavity coupling adjusting device. The optical waveguide microcavity coupling adjustment device comprises a substrate, an optical waveguide, an optical microcavity and a coupling adjustment structure. An optical waveguide is located on one side of the substrate. The optical microcavity is located on the side, provided with the optical waveguide, of the substrate, and the optical microcavity and the optical waveguide are located on the same layer. The coupling adjustment structure comprises a phase change layer located on the side, away from the substrate, of the optical waveguide and a heating layer located on the side, away from the substrate, of the phase change layer, and the heating layer is used for adjusting the temperature of the phase change layer. The orthographic projection of the phase change layer on the substrate is overlapped with the orthographic projection of the coupling area of the optical waveguide and / or the coupling area of the optical microcavity on the substrate.

The invention discloses a dispersion optical microcavity angular velocity detection structure based on compression light field enhancement. The dispersion optical microcavity angular velocity detection structure is composed of a compression light source, a coherent light source, an optical beam splitter, a straight waveguide, two annular optical resonant cavities and a photoelectric detector. The two annular resonant cavities form a coupled resonant cavity system, the dispersion in the cavities can be regulated to be normal dispersion or abnormal dispersion by regulating the reflection coefficient of the coupler between the two rings, and whether a compressed light field is coupled into the system or not can be regulated by operating the opening and closing of the optical baffle. Light fields emitted by the compression light source and the coherent light source are coupled by the optical beam splitter and then enter the straight waveguide as input light signals, and then enter the coupling resonant cavity through the two couplers to be transmitted, and then output signal light enters the photoelectric detector through the straight waveguide to be detected. The standard quantum limit sensitivity of the system to angular velocity sensing can be remarkably broken through by a method of coupling the compressed light field in the dispersive optical resonant cavity.

The utility model provides a display substrate and a display device. The display substrate comprises a substrate and a pixel unit. The pixel unit is located on one side of the substrate. Each pixel unit comprises a first electrode, a light-emitting functional layer and a second electrode. The first electrode is positioned on one side of the substrate; the light-emitting functional layer is located on the side, away from the substrate, of the first electrode. The second electrode is located on one side of the light-emitting functional layer away from the first electrode. The first electrode, the light-emitting functional layer and the second electrode form an optical microcavity. One pixel unit comprises a plurality of light-emitting areas, and for the plurality of light-emitting areas of the same pixel unit, the cavity length of the optical microcavity has a plurality of different values, so that the problems of brightness attenuation and color cast caused by the change of a visual angle are solved.

The invention discloses a continuous wave three-dimensional chiral perovskite laser and a preparation method thereof, and a high-quality perovskite gain medium is prepared by adopting a simple, easy-to-operate and low-cost method for post-processing perovskite crystals through a chiral solution. According to the present invention, the chiral perovskite crystal surface defect is passivated while the stable strong covalent bond or ionic bond can be formed through the intramolecular acting force, the chiral spinning electron in the chiral material is conducted to the achiral perovskite crystal so as to achieve the circular polarization luminescence, and the asymmetric factor reaches 8.5 * 10 <-3 > (-8 * 10 <-3 >); the post-processed perovskite crystal can generate stimulated radiation amplification under the excitation of femtosecond laser, the threshold value is 12.73 mu J / cm < 2 >, the light-emitting asymmetric factor is amplified to 0.054 near the threshold value, laser emission can be formed under the excitation of continuous wave laser under the condition that a high-quality optical microcavity is combined, and the multimode laser threshold value is 0.6 W / cm < 2 >.

The invention belongs to the technical field of optical fiber sensing, and discloses a static ice pressure and temperature compensation sensor based on a double-optical-fiber annular ring-down cavity, which comprises a cavity substrate, an H-shaped base is arranged on the bottom surface of the cavity substrate, a first long groove and a second long groove are respectively formed in the upper surface and the lower surface of the H-shaped base, a first optical fiber is arranged in the first long groove, and a second optical fiber is arranged in the second long groove; the upper surface of the cavity substrate is provided with an elastic membrane used for sealing the cavity, the bottom of the elastic membrane is provided with a protrusion, the first optical fiber and the second optical fiber are provided with a first fiber bragg grating and a second fiber bragg grating respectively, the first fiber bragg grating is fixedly connected with the protrusion, and the second fiber bragg grating is fixedly connected with the protrusion. The second fiber bragg grating is fixedly connected with the second long groove; two ends of the first optical fiber and the second optical fiber are led out from two ends of the cavity substrate and then are respectively connected with an optical fiber annular ring-down cavity. According to the invention, the static ice pressure sensing precision can be improved.

This invention discloses a method for controlling photon spin-orbit coupling in an organic alloy microcavity, belonging to the field of optical microcavity technology. This invention prepares β-type Pe by doping different amounts of DCA into Pe using a volatilization method. 1‑x DCA x An organic alloy, wherein x ≤ 20 wt%, allows for the controllability of crystal color from yellow-green to orange-red. Furthermore, this organic alloy exhibits birefringence, and its application in the fabrication of optical microcavities allows for the observation of TE-TM spin-orbit coupling and Rashba-Dresselhaus spin-orbit coupling within the microcavities. This provides a novel type of microcavity for studying the interaction between light and matter in organic alloy microcavities, and the controllability of photon spin-orbit coupling within these microcavities can be achieved by adjusting the value of x.

The invention relates to the technical field of optical sensing, in particular to a displacement sensing system based on a large-taper conical optical fiber and a measuring method, and the displacement sensing system based on the large-taper conical optical fiber comprises a tunable laser and a photoelectric detector. The large-taper conical optical fiber is positioned between the tunable laser and the photoelectric detector and is used for transmitting light waves; the system further comprises a polarization controller. The cavity at one end of the optical microcavity is close to the large-taper conical optical fiber, the displacement device is connected with the other end of the optical microcavity, and the optical microcavity and the large-taper conical optical fiber are always in a critical coupling state; and the computer is respectively connected with the tunable laser and the photoelectric detector. The problems that an existing small-taper conical optical fiber is poor in stability and anti-interference capacity, and a sensing system is low in measurement sensitivity are solved, the optical microcavity and the large-taper conical optical fiber are combined, high-precision displacement measurement can be achieved, and the large-taper conical optical fiber displacement sensor is suitable for measurement occasions with the high sensitivity requirement.

The invention discloses an on-chip integrated optical frequency comb generation structure and an optical frequency comb generation method, the structure is formed by heterogeneous integration of a laser chip and an integrated optical microcavity chip, and the integrated optical microcavity chip comprises a polarization beam splitter, two ring filters, an Add-drop type microcavity and two output ports; the polarization beam splitter is used for dividing laser injected by the laser chip into a TE mode and a TM mode, and the TE mode and the TM mode have different power ratios and are injected into the two ring filters respectively. The two ring filters are respectively provided with a heating electrode for controlling the size of the passing wavelength, and the two ring filters have different diameters for transmitting different wavelengths; the Add-drop type microcavity is used for generating an optical frequency comb, and a heating electrode is arranged above the microcavity and used for controlling the resonant wavelength passing through the microcavity. The problems that an existing optical frequency comb debugging system is large and debugging is complex can be solved, the size of the microcavity optical frequency comb can be greatly reduced, and power consumption is reduced.

The invention relates to an optical microcavity underwater acoustic sensor, in particular to an ultra-sensitive underwater acoustic sensor based on a resonant cavity packaging structure and a measuring method. The sensor comprises a 1630 nm laser, a first isolator, a first polarization controller, a 1550 nm laser, a second isolator, a second polarization controller, a phase modulator, a resonant cavity packaging structure, a long pass filter, a photoelectric detector, an oscilloscope and a computer. The resonant cavity packaging structure comprises a packaging base. A groove is formed in the surface of the packaging base; two notches are formed in the groove wall of the groove; a conical optical fiber penetrates through the two notches; a crystal resonant cavity is arranged in the groove, and the crystal resonant cavity is coupled with the conical optical fiber; the groove and the two notches are jointly filled with a packaging adhesive layer, and the packaging adhesive layer wraps the conical optical fiber and the crystal resonant cavity at the same time. The problems that an existing optical microcavity underwater acoustic sensor is low in sensitivity and poor in stability are solved, and the optical microcavity underwater acoustic sensor is suitable for the fields of underwater target monitoring, seabed resource exploration, underwater acoustic communication and the like.

The embodiment of the application provides a kind of arrayed microcavity blood pressure detection system based on digital light frequency double comb, it is related to optical sensing technical field.The input end of light intensity modulator is connected with laser, waveform generator respectively, the output end of light intensity modulator, polarization controller, on-chip optical microcavity array are sequentially connected;Light intensity modulator is modulated based on electrical modulation signal to single-frequency light, and optical frequency double comb signal is obtained;Optical frequency double comb signal enters on-chip optical microcavity array after polarization controller, on-chip optical microcavity array is pasted to the position of the artery to be measured, and on-chip optical microcavity array includes multiple sensing units, each sensing unit generates an independent pulse signal, and on-chip optical microcavity array obtains sensing signal based on optical frequency double comb signal and the jump extrusion of the artery to be measured position, and signal processing mechanism obtains blood pressure value information based on sensing signal.The detection system can realize the technical effect of improving the accuracy and convenience of blood pressure measurement.

The present application relates to the field of optical microcavity sensor demodulation technology, and specifically to a detection method and system for an optical microcavity sensor. Among them, the detection method of the optical microcavity sensor is applied to an optical microcavity sensor based on the optical mode localization effect, and the detection method of the optical microcavity sensor includes: obtaining the output spectrum of the optical microcavity sensor based on the optical mode localization effect; the output spectrum includes a symmetric peak and an antisymmetric peak; measuring the first resonant amplitude corresponding to the symmetric peak and the second resonant amplitude corresponding to the antisymmetric peak in the output spectrum; based on the first resonant amplitude and the second resonant amplitude, demodulating to obtain the target detection physical quantity of the optical microcavity sensor based on the optical mode localization effect. Based on the resonant amplitudes of the symmetric peak and the antisymmetric peak, the target detection physical quantity is demodulated to achieve accurate measurement of the target detection physical quantity and reduce the influence of changes in physical quantities in the environment.

The invention provides a soliton micro-comb generation device and method, and relates to the technical field of laser. The soliton micro-comb generation device comprises a laser, a current controller, a first temperature controller, a phase shifter and an optical micro-cavity module, the laser is used for emitting a pump beam, and the pump beam enters the optical micro-cavity module through the phase shifter; after a pump light beam enters the optical microcavity module, an optical sideband is generated based on the four-wave mixing effect, the optical microcavity module reflects part of the pump light beam into an inner cavity of the laser, the phase shifter is used for adjusting the optical path between the laser and the optical microcavity module, and a soliton micro comb is generated and output in the optical microcavity module based on a self-injection locking mechanism. According to the soliton micro-comb generation device and method provided by the embodiment of the invention, the packaging difficulty of the generation device and the requirement on the precision of the device can be reduced, a soliton micro-comb light source can be conveniently deployed outside a laboratory, and the stability of the soliton micro-comb output by the generation device is improved.

This application provides a quantum optical microcavity device modified with fluorinated organophosphonic acid and its fabrication method, relating to the fields of organic chemistry and optical engineering. The quantum optical microcavity device includes a microcavity body and a fluorinated organophosphonic acid monolayer attached to the surface of the microcavity body. A hydrophobic fluorinated organophosphonic acid monolayer is formed on the surface of the microcavity body through a chemical reaction between a mixed solution containing fluorinated organophosphonic acid molecules and the surface of the microcavity body. Since the active head groups of the fluorinated organophosphonic acid can form chemical bonds with –OH and Si–O–Si on the surface of silica through reaction, the adsorption of water molecules from the air onto the –OH and Si–O–Si on the surface of the silica microcavity body can be effectively suppressed, thus improving the Q-value stability of the whispering-gallery mode quantum optical microcavity device.

The invention discloses a high-sensitivity method for detecting calcium ions inside and outside cells, and belongs to the field of laser technology and photonics. An optical microcavity doped with a fluorescent dye is used as a micro laser, the surface of the optical microcavity is functionalized, the optical microcavity is connected with a calcium ion probe to form a sensing system, the sensing system is placed in solutions containing different free calcium concentrations and different types of cells, the change of a microcavity emission spectrum is monitored, and the calcium level is rapidly analyzed on the basis of the displacement difference of a central wavelength. The detection limit of calcium ions reaches pM order of magnitude, the dynamic range at least reaches 6 order of magnitude, and non-toxic, rapid, real-time and accurate quantification of calcium concentrations in different cells is realized.

This invention relates to the field of optoelectronic materials and devices, and particularly to a method for improving the Q-value of microcavity modes based on singular points. Several identical optical microcavities are arranged near a dielectric waveguide, with each microcavity equidistant from the waveguide. Chiral modes within the microcavities are excited, and unidirectional coupling occurs between these chiral modes through the waveguide. This unidirectional coupling generates singular points of arbitrary order within the system. The order of these singular points depends only on the number of identical microcavities. Based on the distance between adjacent microcavities, the singular points in the system enhance the Q-value of all modes in the final microcavity through a cascade effect of constructive interference between the microcavities. This invention only requires increasing the number of identical microcavities to improve the Q-value of modes within the microcavities, thus enabling the application of microcavities in various scenarios.