250 results about "Optical microcavity" patented technology

A white light-emitting microcavity light-emitting diode device, comprising:

• • a) A reflective electrode and a semi-transparent electrode formed over a substrate and an unpatterned white-light-emitting layer formed between the reflective electrode and the semi-transparent electrode, the reflective electrode, semi-transparent electrode, and unpatterned white-light-emitting layer forming an optical cavity. Either the reflective or semi-transparent electrode is patterned to form independently-controllable light-emitting sub-pixel elements.
  • b) Color filters are formed over a side of the semi-transparent electrodes opposite the unpatterned white light-emitting-layer in correspondence with the independently-controllable light-emitting elements to form colored sub-pixels. At least one independently-controllable light-emitting element has at least two commonly-controlled portions that together emit substantially white light to form a white sub-pixel.
  • c) The optical cavity of one or more of the commonly-controlled portions of the white sub-pixel comprises optical microcavities tuned to emit light at a different complementary wavelength at an emission angle.

The invention provides a whispering gallery mode photonic device and a preparation method thereof. According to the preparation method of a micro ring array structure, solvent droplets are utilized to dissolve a polymer film, so that a "coffee ring effect" can be generated, and therefore, polymer can be accumulated at the periphery of liquid so as to form an annular structure of which the height is obviously different from the height of the film, and conduction and confinement of light in the polymer structure can be realized; and light signals are inputted to the micron ring structure through utilizing excitation, scattering or near field coupling modes, so that a resonance effect in a whispering gallery mode can be realized. The prepared micron ring structure can be adopted as a high-quality factor optical micro cavity, so that a modulation-mode spectrum can be obtained, the width of spectral lines of the spectrum being significantly narrowed; a whispering gallery-mode light amplification stimulated emission can be realized through optical gain; and in a multi-ring coupled array structure, light signal processing and high sensitive response to outside stimuli can be realized according to the wavelength change information of the modulated spectrum and laser modes.

The use of optical microcavities, high-Q resonators and slow-light structures as tools for detecting molecules and probing conformations and measuring polarizability and anisotropy of molecules and molecular assemblies using a pump-probe approach is described. Resonances are excited simultaneously or sequentially with pump and probe beams coupled to the same microcavity, so that a pump beam wavelength can be chosen to interact with molecules adsorbed to the microcavity surface, whereas a probe beam wavelength can be chosen to non-invasively measure pump-induced perturbations. The induced perturbations are manifest due to changes of resonance conditions and measured from changes in transfer characteristics or from changes of the scattering spectra of a microcavity-waveguide system. The perturbations induced by the pump beam may be due to polarizability changes, changes in molecular conformation, breakage or formation of chemical bonds, triggering of excited states, and formation of new chemical species. Furthermore, heat may be generated due to absorption of the pump beam. Furthermore, the use resonant modes with different states of polarization allows for measurements of polarizability and its anisotropy in samples interacting with the optical device.

The invention discloses a meta material-microcavity composite structure and a preparation method and use thereof. The composite structure, from up to down, successively includes: a three-layer composite structure, from up to down, including meta materials, two-dimensional materials and optical microcavities, wherein the upper layer meta materials is provided with a plurality of resonance units arranged periodically. Pump lights incident into the meta materials to cause a change of a nonlinear refractive index of the two-dimensional materials, and a local field enhancement effect of the meta materials stimulated by the pump lights and a local field enhancement effect of the optical microcavities are together to improve the nonlinear refractive index of the two-dimensional materials to allow the effective refractive index around the meta materials to be changed, thereby a transmission state of that lights through composite structure is changed. According to the invention, the nonlinear refractive index of the materials is improved, the response time is reduced, and all-optical adjustability is enhanced. The production process is simple, available materials are wide, and the composite structure of the invention may be used for the all-optical switches or the sensors.

The invention provides a light and small type ultra-low phase noise photoelectric oscillator and an optical micro-cavity manufacturing method thereof. The oscillator comprises a laser, an electrooptical modulator, an optical micro-cavity, a photoelectric detector, an electric amplifier, an electric filter and an electric coupler. An optical signal output by the laser is subjected to modulation and output by the electrooptical modulator, the optical signal amplification by the optical amplifier, optical delay and optical energy storage by the optical micro-cavity, and the photoelectric conversion by the photoelectric detector. The converted electric signal passes the electric amplifier and the electric filter, and is fed back to the electrooptical modulator through the electric coupler. According to the invention, by use of the photoelectric link de-noising technology, and taking low-loss and high Q value optical micro-cavity as an energy storing element, ultra-low phase noise of the microwave signals output by the photoelectric oscillator is achieved; and by use of the micro type optical micro-cavity, small and light photoelectric oscillator is achieved.

The invention relates to the field of lasers and specifically relates to a tunable optical micro-cavity Raman laser and a tunable optical micro-cavity doped laser. The tunable optical micro-cavity Raman laser comprises a first pump source, an optical micro-cavity, a coupling device and a temperature control apparatus. The first pump source and the optical micro-cavity are connected via the coupling device, and the optical micro-cavity is in a temperature control scope of the temperature control apparatus. The tunable optical micro-cavity doped laser comprises a second pump source generating 980nm or 1480nm pump light, a doped optical micro-cavity, a coupling device, a wavelength division multiplexer and a temperature control apparatus. The second pump source, the doped optical micro-cavity and the wavelength division multiplexer are connected through the coupling device, and the doped optical micro-cavity is in the temperature control scope of the temperature control apparatus. According to the invention, the structure is simple; the size is small; the Q-value is high; and subsequent integration application is provided with convenience. Tuning of wavelengths of emitting laser is realized through controlling of the temperature of the micro-cavity. The tuning mechanism is simple, convenient and efficient.

The invention discloses an on-chip tunable optical isolator based on an active-passive optical micro cavity coupling system. The on-chip tunable optical isolator comprises an active optical micro cavity (1), a passive optical micro cavity (2), a first optical fiber (3) and a second optical fiber (4). The first optical fiber (3) is coupled to the active optical micro cavity (1). The active optical micro cavity (1) is coupled to the passive optical micro cavity (2). The second optical fiber (4) is coupled to the passive optical micro cavity (2). The optical isolator of the invention has the characteristics of high sensitivity, wide tunable range, simple preparation and easy integration.

The invention provides a Fano resonance sensing apparatus based on an axisymmetric optical micro-cavity. The Fano resonance sensing apparatus comprises an axisymmetric optical micro-cavity and a coupled waveguide, wherein the axisymmetric optical micro-cavity has a columnar shape and comprises a straight cylinder type solid cylinder micro-cavity, a straight cylinder type hollow cylinder micro-cavity, a microbubble-like solid cylindrical micro-cavity, a microbubble-like hollow cylindrical micro-cavity, a micro ring cavity, a metal-coated cylindrical micro-cavity and the like, the material of the micro-cavity is silicon dioxide, a macromolecule polymer, an optic crystal, a semiconductor material and the like, and the coupled waveguide is optical fibers with a diameter of 0.5-1.5 [mu]m, a coupled prism having high refractive index, an on-chip integrated waveguide and the like. According to the present invention, the discrete high-order echo wall mode in the micro-cavity and the continuous background light are subjected to offset interference, such that the dynamically-changing Fano resonance spectrum can be stably and effectively produced.

An optical microcavity for a high-contrast display comprises an enclosed cavity having a front wall and a back wall, where the front wall comprises a pinhole opening for emission of light from the cavity and the back wall is configured to generate or transmit light into the cavity. An outer surface of the front wall absorbs some or substantially all optical wavelengths of externally incident light so as to appear black or colored. An inner surface of the front wall comprises a light reflectivity of greater than 90% to promote photon recycling within the cavity and light emission through the pinhole opening.

The invention discloses a frequency stabilization type photoproduction microwave signal source based on an optical microcavity, and relates to the field of optical communication devices. The frequency stabilization type photoproduction microwave signal source comprises an optical loop and an optical coupler, wherein the optical loop is mainly composed of the optical microcavity, a band-pass filter, an optical amplifier and an optical coupler. The optical microcavity is used for forming periodic comb filtering with fixed frequency space; the band-pass filter is used for selecting two optical signals with adjacent frequencies from multi-frequency optical signals output from the optical microcavity; the optical amplifier is used for generating optical power gains in the optical loop, achieving hot shooting of the two optical signals with the adjacent frequencies, and forming double-frequency lasers; the optical coupler is used for outputting part of optical power coupling of the double-frequency lasers; a photoelectric detector is used for receiving the double-frequency lasers output by the optical couplers and obtaining photoproduction microwave signals with an optical beat frequency effect. By means of the frequency stabilization type photoproduction microwave signal source, the frequency stability of the microwave signals is improved, and the phase noise of the photoproduction microwave signals is restrained.

The invention discloses an optical microcavity optical frequency comb generation apparatus and generation method based on injected seed light. The optical microcavity optical frequency comb generation apparatus comprises pumping laser, a first optical amplifier, a first beam splitter, a fiber loop, an optical filter, a binding device and an optical microcaity, wherein an input end of the first amplifier is connected to the pumping laser; an input end of the first beam splitter is connected to an output end of the first optical amplifier; one end of the fiber loop is connected to a second output end of the first beam splitter; an input end of the optical filter is connected to the other end of the fiber loop; a first input end of the binding device is connected to the first output end of the first beam splitter; a second input end of the binding device is connected to an output end of the optical filter; an input end of the optical microcavity is connected to the output end of the binding device; output of the pumping laser is divided into two parts by the first beam splitter after amplification by the first optical amplifier, including pumping light and seed light orderly passing through the fiber loop and the optical filter; and the pumping light and the seed light are injected into the optical microcavity via the binding device, and then optical frequency comb with controllable comb gaps is produced.

The invention discloses a top emission quantum-dot light-emitting diode (QLED) field-effect transistor with micro-cavity structure and a fabrication method of the top emission QLED filed-effect transistor. The top emission QLED field-effect transistor comprises a substrate, a first electrode, an insulation layer, a second electrode, a functional layer and a third electrode, wherein the first electrode is a reflection electrode, the second electrode is a transparent electrode, and the third electrode is a half-reflection electrode. Structure improvement and optimization are performed on the electrodes of top emission QLED field-effect transistor, an optical micro-cavity is formed in the device; and by means of an interference effect, light selection is achieved, the monochromaticity of emergent light wavelength corresponding to the cavity length of the optical micro-cavity and the luminous efficiency of a vertical direction are improved.

The invention discloses a surface plasma enhanced type mixture medium echo wall mode microcavity sensor. The surface plasma enhanced type mixture medium echo wall mode microcavity sensor comprises a tunable laser, a polarization controller, a conical optical fiber, a mixed medium microcavity, plasma nanoparticles and a photoelectric detector; laser output by the tunable laser enters the mixed medium microcavity through the conical optical fiber and performs total reflection in the mixed medium microcavity to form echo wall mode resonance; the polarization controller is used for controlling laser polarization state input into the conical optical fiber; the photoelectric detector is used for recording and analyzing an echo wall mode transmission spectrum at the output end of a coupling system consisting of the conical optical fiber and the mixed medium microcavity; the mixed medium microcavity is formed by plating a high-refractive-index film layer on the surface of an optical microcavity; the plasma nanoparticles are attached to the surface of the mixed medium microcavity; the mixed medium microcavity is placed in measured physical quantity. The surface plasma enhanced type mixture medium echo wall mode microcavity sensor has the advantages of compact structure, high sensitivity, high response speed and the like, and has potential application value in the field of biochemical trace real-time detection.

The invention relates to an optical and microelectromechanical technology, in particular to a cantilever beam type accelerometer based on a photonic crystal microcavity. The application of the photonic microcavity in the cantilever beam type accelerometer is further expanded. The cantilever beam type accelerometer based on the photonic crystal microcavity comprises a base, a cantilever beam and a mass block, wherein the base is processed on a semiconductor substrate by a processing process of a microelectromechanical device; the single end of the cantilever beam is fixed to the base; the mass block is fixed to the free end of the cantilever beam; an optical waveguide which is perpendicular to the cantilever beam is arranged on the base; the end part of the cantilever beam, which is fixed to the base, is provided with a zipper cavity; two brackets of the zipper cavity are parallel to the optical waveguide on the base; and the zipper cavity and the optical waveguide form a microcavity-optical waveguide coupling structure. The invention has reasonable and simple structure and good characteristics of high sensitivity, high resolution, high measurement precision, electromagnetic interference resistance, small size, convenient integration, light weight, operation in severe environment, wide application range, and the like.

The invention discloses a method for improving collection efficiency of diamond NV color center fluorescence. The method comprises the following steps of forming an optical resonator by coupling a nano-diamond and a microsphere cavity based on the Purcell effect, integrating a microwave antenna thereon to prepare a microsphere cavity (200-500 microns) containing the nano-diamond, exciting the diamond NV color center to generate fluorescence by 532nm laser, and enhancing and collecting the fluorescence using a whispering wall mode such that the fluorescence generated by the diamond NV color center can be continuously circulated in the microsphere cavity, thereby establishing a strong light field and directly achieving the collection of fluorescence using the fiber connected to the sphere cavity. The method combines nano-diamond with optical microcavity with low requirements on preparation process, has the characteristics such as low cost, small mode volume and high energy density, realizes excitation and efficient collection of diamond NV color center fluorescence, and is expected to realize integrated application of NV color center based high sensitivity quantum sensors.

The present invention discloses an on-chip broadband coupling optical microcavity system and a coupling method thereof. In the invention, a non-circular optical microcavity and an optical waveguide prepared on a chip are adopted, and the slight deformation of the non-circular optical microcavity causes the eigenstate echo wall mode originally distributed only in the edge of the circular optical microcavity to extend into the non-circular optical microcavity, forming a "tail"; laser and the "tail" of the non-circular optical microcavity are in phase matching, so as to stimulate the excited state echo wall mode of the non-circular optical microcavity; the echo wall mode of the non-circular optical microcavity can be refracted into the optical waveguide through its "tail"; the optical waveguide enables effective broadband excitation and collection of the echo wall mode in the non-circular optical microcavity, i.e., the completion of the effective broadband coupling of the optical waveguide and the non-circular optical microcavity; and the deformation of the non-circular optical microcavity is so little that the non-circular optical microcavity can maintain high intrinsic quality factors (> 10<4>) without introducing large radiation losses.

The invention discloses a free-space optical micro-cavity Raman laser sensing device and a sensing method thereof. The sensing device comprises a laser light source, a first focusing object lens, an optical micro-cavity, a second focusing object lens, a first collimating lens, a second collimating lens, a first photoelectric detector, an oscilloscope, a filter sheet, a third focusing object lens, a second photoelectric detector and a base spectrum analyzer. Raman laser of an optical micro-cavity is triggered through free-space frequency-tunable laser, and by observing frequency of beat frequency of the Raman laser, information of nanoscale-dimension particles attached to the surface of the optical micro-cavity is obtained; in the free-space Raman laser sensing technology, a whispering gallery mode and the Raman laser can be directly triggered in the free space through the frequency-tunable laser; and through avoiding the technical problems due to the introduction of an optical fiber taper, the flexibility of the device is improved, and signal to noise ratio is reduced, so that sensitivity of the sensing device is improved, and detection limit is reduced.

The present invention discloses a microcavity thermal effect compensation method in a Kerr optical frequency comb soliton mode locking process. Auxiliary laser is introduced into an optical microcavity and is employed to perform heating makeup of thermal effect in the soliton mode locking process to keep the thermal equilibrium state of the optical microcavity in the soliton mode locking process and perform certainty realization of the soliton mode locking in the optical microcavity each time so as to greatly simplify the soliton mode locking process in the optical microcavity and avoid the problems of the current Kerr optical frequency comb soliton mode locking process is high in randomness, bad in reliability and liable to disturbance, etc; and moreover, the optical power of the Kerr optical frequency comb is monitored to feed back and control the wavelength of the auxiliary laser, the soliton mode locking state can be stably existed for a long time, and when the soliton mode locking state is lost caused by external interference, the soliton mode locking state can be automatically recovered through control of the auxiliary laser so as to greatly improve the stability of the soliton mode locking state in the optical microcavity.

An optical cavity mode apparatus comprising at least one microresonator; a light emitting diode for supplying light irradiation to the microresonator to stimulate the excitation level of the microresonator; and an optical detector to obtain spectra of the microresonator stimulated by the light emitting diode.