394 results about "Resonance wavelength" patented technology

A device such as a filter or reflector includes a conductive layer including a periodic pattern of elements. The elements have shapes and sizes configured such that a transmittance or reflectance spectrum of the conductive layer has a drop at a long-wavelength end. The elements have a period configured such that the spectrum has a dip at a Plasmon mode resonant wavelength. The spectrum further includes a peal- between the dip and the drop.

The present invention relates to a tag-use antenna allowing a miniaturization while maintaining a constant minimal change of a communication distance. The tag-use antenna has a feed part of a folded dipole antenna of a size of 53 mm long and 7 mm wide being connected to, and equipped with, an LSI chip of Rc=500 ohms and Cc=1.4 pF and is covered with plastic resin 13 of the dielectric constant εr=3 and thickness of t=0.75 mm on both sides of the antenna. The dipole part of 1 mm wire path width of the tag-use antenna is formed in a rectangular spiral by being bent inward from both ends at bending parts at four places. The entire length of the dipole antenna when extending the four bending parts straight is featured so as to be shorter than one half of a resonance wavelength of the antenna. An inductance part is featured in the intermediate part of the both dipole parts in the neighborhood of the center of the antenna. The inductance part is connected to the chip equipment part in parallel with the both dipole parts.

An optical resonator type organic electroluminescent element has a multilayered film mirror 30, a transparent electrode 12, an electron hole transportation layer 14 and a luminescent layer 16 configuring an organic layer, and a metallic electrode mirror 20, formed on a glass substrate 10. The optical resonator type organic electroluminescent element amplifies a specific wavelength (especially, in a range of about 30 nm toward a shorter wavelength side from a luminescence peak wavelength of the organic layer) in luminescence light by a minute optical resonator, which comprises the multilayered film mirror 30 and the metallic electrode mirror 20. It is determined that the minute optical resonator has an optical length L which is twice as long as a resonance wavelength, the organic layer has a thickness of 100 nm or more, and the transparent electrode has a thickness of 50 nm or more or a thickness so to have a sheet resistance of 30 OMEGA / square or less. Thus, the transparent electrode can be prevented from generating heat even when a large current is caused to flow into it, and the element characteristics can be reliably prevented from being deteriorated. Moreover, the reliability of this element can be improved because the organic layer containing the luminescent layer has a sufficient thickness.

The current invention provides methods for detecting trace analytes in solution or suspension using coupled micro-ring resonators. The methods of the current invention determine the presence and concentration of the target analytes in real time by exposing the micro-ring resonator to the analyte and determining the resulting rate of change of resonance wavelength experienced by a sensing micro-ring resonator as compared to a reference micro-ring resonator.

A wavelength tunable laser comprising a laser diode and a closed external cavity formed by one or more optical resonators either horizontally or vertically coupled to adjacent waveguides. The optical resonator primarily functions as a wavelength selector and may be in the form of disk, ring or other closed cavity geometries. The emission from one end of the laser diode is coupled into the first waveguide using optical lens or butt-joint method and transferred to the second waveguide through evanescent coupling between the waveguides and optical resonator. A mirror system or high reflection coating at the end of the second waveguide reflects the light backwards into the system resulting in a closed optical cavity. Lasing can be achieved when the optical gain overcomes the optical loss in this closed cavity for a certain resonance wavelength which is tunable by changing the resonance condition of the optical resonator through reversed biased voltage or current injection. Multiple optical resonators may be used to reduce the lasing threshold and provide higher power output. With monolithic integration, more optical devices can be integrated with the tunable laser into the same substrate to produce optical devices that are capable of more complex functions, such as tunable transmitters or waveguide buses.

An organic EL device includes: a base body; pixels that are arranged in the base body and emit light beams having either of at least two different colors from among red, green and blue; an reflection layer that has optical reflectivity and arranged on the base body; an anti-reflection layer that is arranged on the reflection layer and has optical reflectivity lower than that of the reflection layer; an insulation layer that is arranged on the anti-reflection layer and has optical transmittance; a first electrode that is arranged in each pixel on the insulation layer and has optical transmittance; an organic functional layer that is arranged on the first electrode and includes at least a luminescent layer; a second electrode that is arranged on the organic functional layer and has optical reflectivity and optical transmittance; and an optical resonator that is formed between the reflection layer and the second electrode to resonate the light from the organic functional layer, wherein the optical resonator has a resonance wavelength corresponding to the color of the light emitted from the pixels in a first area out of an area of the pixels, and the anti-reflection layer is provided in an area except for the first area out of the area of the pixels.

[Problems] To provide a tunable laser with high reliability and high performance, and of low cost.[Means for Solving Problems] A tunable laser (10) comprises a double ring resonator (11) where ring resonators (111, 112) of different sizes are coupled through a directional coupler (122), an LD side waveguide (13) connected at one end (131) to the ring resonator (111) through a directional coupler (123), a reflection side waveguide (14) connected at one end (141) to the ring resonator (112) through a directional coupler (123), a PLC board (15) on which the ring resonator (111) and the like are formed, a high reflection film (16) provided at the other end (142) of the reflection side waveguide (14), an LD chip (17) having a low reflection film (18) formed on either of two opposing emission end faces (171, 172) and coupled optically with the other end (132) of the LD side waveguide (13), and film-like heaters (191-194) for varying the resonance wavelength of the double ring resonator (11).

A system and method are disclosed which enable deposition parameters to be controlled in producing a metal surface to tune the localized surface plasmon resonance (LSPR) wavelength of such metal surface to a desired wavelength. For example, the surface produced may be used as an enhancement surface within a surface-enhanced spectroscopy process, wherein such surface is produced having a LSPR wavelength that provides the maximum extinction of a particular excitation light. In one embodiment, a metal is deposited onto a substrate, while controlling one or more deposition parameters to tailor the LSPR of the resulting metal surface to a desired wavelength. In one embodiment, the substrate is smooth, and does not require a mask prearranged thereon for controlling the LSPR wavelength. Rather, deposition parameters, such as temperature of the substrate, deposition rate, and film thickness may be controlled to effectively tune the LSPR wavelength of the metal surface.

In an optical device, a ring resonator, having a resonance wavelength, optically couples an optical signal that includes a wavelength from an input optical waveguide to an output optical waveguide. A monitoring mechanism in the optical device, which is optically coupled to the output optical waveguide, monitors an output optical signal on the output optical waveguide. For example, the monitoring mechanism may dither a temperature of the ring resonator at a frequency using a heater, and the output optical signal may be monitored by determining amplitude and phase information of the output optical signal at the frequency and twice the frequency. Moreover, control logic in the optical device adjusts the resonance wavelength based on the monitored output optical signal, where the adjustment is made without monitoring an input optical signal on the input optical waveguide.

Composite materials that can be used to block radiation of a selected wavelength range or provide highly pure colors are disclosed. The materials include dispersions of particles that exhibit optical resonance behavior, resulting in the radiation absorption cross-sections that substantially exceed the particles' geometric cross-sections. The particles are preferably manufactured as uniform nanosize encapsulated spheres, and dispersed evenly within a carrier material. Either the inner core or the outer shell of the particles comprises a conducting material exhibiting plasmon (Froehlich) resonance in a desired spectral band. The large absorption cross-sections ensure that a relatively small volume of particles will render the composite material fully opaque (or nearly so) to incident radiation of the resonance wavelength, blocking harmful radiation or producing highly pure colors. The materials of the present invention can be used in manufacturing ink, paints, lotions, gels, films, textiles and other solids having desired color properties. The materials of the present invention can be used in systems consisting of reflecting substances such as paper or transparent support such as plastic or glass films. The particles can be further embedded in transparent plastic or glass beads to ensure a minimal distance between the particles.

A wavelength tunable laser comprising a laser diode and a closed external cavity formed by one or more optical resonators either horizontally or vertically coupled to adjacent waveguides. The optical resonator primarily functions as a wavelength selector and may be in the form of disk, ring or other closed cavity geometries. The emission from one end of the laser diode is coupled into the first waveguide using optical lens or butt-joint method and transferred to the second waveguide through evanescent coupling between the waveguides and optical resonator. A mirror system or high reflection coating at the end of the second waveguide reflects the light backwards into the system resulting in a closed optical cavity. Lasing can be achieved when the optical gain overcomes the optical loss in this closed cavity for a certain resonance wavelength which is tunable by changing the resonance condition of the optical resonator through reversed biased voltage or current injection. Multiple optical resonators may be used to reduce the lasing threshold and provide higher power output. With monolithic integration, more optical devices can be integrated with the tunable laser into the same substrate to produce optical devices that are capable of more complex functions, such as tunable transmitters or waveguide buses.

A dipole part of a length shorter than half of an antenna resonance wavelength is placed so as to be rolled and enables a feeding part 11 to feed a chip. An inductance part 12 for adjusting the inductance of the antenna is provided so as to sandwich the feeding part 11. The inductance 12 is provided using an empty space of the inside of the rolled dipole part. By providing the inductance part 12, the inductance of the antenna can be adjusted so as to resonate at a predetermined frequency with the capacitance of the chip connected to the feeding part 11. At this time, although the radiation resistance of the antenna becomes extremely large according to calculations, it is actually almost the same as the resistance of the chip due to loss, and the power received by the antenna can be provided to the chip.

A light emitting apparatus is provided. The light emitting apparatus has a plurality of unit devices including, on a substrate, a reflecting layer, a semi-transmitting semi-reflecting layer, a light emitting layer disposed between the light reflecting layer and the semi-reflecting layer, and a light transmitting pixel electrode disposed between the light reflecting layer and the semi-reflecting layer, a plurality of the unit devices including light emitting regions provided with resonator structures, so that a plurality of the unit devices include first and second unit devices of which resonance wavelengths of the resonator structures are different from each other, wherein the pixel electrode includes an electrode portion disposed in the light emitting region and a connection portion connected to a wire line, wherein the pixel electrode of each of the first unit devices is constructed by stacking a plurality of electrode layers corresponding to the electrode portion and the connection portion, wherein the pixel electrode of each of the second unit devices is constructed by stacking at least electrode layers corresponding to the electrode layer and the connection layer and an electrode layer corresponding to the connection portion, and wherein the number of the stacked electrode layers in the electrode portion of each of the first unit devices is smaller than the number of the stacked electrode layered in the electrode portion of each of the second unit devices.

The invention provides a tunable laser with high reliability and high performance, and of low cost. A tunable laser (10) comprises a double ring resonator (11) where ring resonators (111, 112) of different sizes are coupled through a directional coupler (122), an LD side waveguide (13) connected at one end (131) to the ring resonator (111) through a directional coupler (121), a reflection side waveguide (14) connected at one end (141) to the ring resonator (112) through a directional coupler (123), a PLC board (15) on which the ring resonator (111) and the like are formed, a high reflection film (16) provided at the other end (142) of the reflection side waveguide (14), an LD chip (17) having a low reflection film (18) formed on either of two opposite emission end faces (171, 172) and coupled optically with the other end (132) of the LD side waveguide (13), and film-like heaters (191-194) for varying the resonance wavelength of the double ring resonator (11).

A micro-optical resonator type organic light-emitting device comprising a substrate, and a multi-layered thin film, a transparent electrode, an organic light-emitting layer and a back electrode disposed on the substrate. If 0-mode resonance wavelength of the organic light-emitting device is expressed by lambd0, n-mode resonance wavelength of the organic light-emitting device is expressed by lambdn (in which n is a positive integer) and reflectivity of the multi-layered thin film against light having a wavelength lambd is expressed by R(lambd), R(lambd0) is 40% or more and R(lambd1) or R(lambd2) is 30% or less.

A chemical sensor element contains a resonator having a first reflector in which particles of a fine metal structure are arranged two-dimensionally and periodically is counterposed with interposition of a dielectric layer to a second reflector, wherein the resonance wavelength of a resonator in which the entire of the first reflector is replaced by a metal thin film having the same thickness as the metal fine structure is different from the surface plasmon resonance wavelength induced in the metal fine structure; and the mode of the surface plasmon resonance excited in the metal fine structure is coupled with the mode of the resonator in which the entire of the first reflector is replaced by the metal thin film.

A microcavity-controlled two-dimensional carbon lattice structure device selectively modifies to reflect or to transmit, or emits, or absorbs, electromagnetic radiation depending on the wavelength of the electromagnetic radiation. The microcavity-controlled two-dimensional carbon lattice structure device employs a graphene layer or at least one carbon nanotube located within an optical center of a microcavity defined by a pair of partial mirrors that partially reflect electromagnetic radiation. The spacing between the mirror determines the efficiency of elastic and inelastic scattering of electromagnetic radiation inside the microcavity, and hence, determines a resonance wavelength of electronic radiation that is coupled to the microcavity. The resonance wavelength is tunable by selecting the dimensional and material parameters of the microcavity. The process for manufacturing this device is compatible with standard complementary metal oxide semiconductor (CMOS) manufacturing processes.

The present invention aims to provide a tuning light source apparatus including a multiple-optical resonator, where the resonance frequencies of the respective optical resonators in a multiple-optical resonator are exactly coincided with the set frequency, and the frequency of the output laser beam is locked within a range of about 1 GHz from the set frequency. Current is flowed to TO phase shifters based on lights detected by light receiving elements, and the resonance wavelengths of resonators are adjusted in an aim of obtaining a state in which an intensity of an oscillation light becomes a maximum and at the same time an intensity of a light from a through port becomes a minimum.

This invention multifunction imager is made based on the surface plasma resonance phenomenon composed of p-polarized parallel light sources, a light incident angle modulation system, a sample transport and analysis system, a reflection light cut-away and modulation system, a detector, and a data register and process system. Said device utilizes the dispersion of P-polarized light and a prism to activate the resonance of sensing film surface plasma to test resonance signals. The resonance image signal or wave length scan resonance signal can be tested by conversion of light sources, the chip research result can be reached by micro-lattice process to sense film to realize spectrum conversion of image and resonance wavelength.

The invention provides a temperature and pressure integrated sensing device based on high birefringence photonic crystal fiber surface plasmon resonance and a measuring method thereof. The sensor includes a wide spectrum light source, a fiber connector, a common single-mode fiber, a high birefringence plated film photonic crystal fiber and a spectrometer. The external temperature and the pressureof the high birefringence plated film photonic crystal fiber are judged through surface plasmon resonance wave spectrums detected by the spectrometer. In a condition of a certain pressure, when the external temperature of the sensor increases, the resonance wavelength is reduced; when the external temperature drops, the resonance wavelength is increased. In a condition of a certain temperature, when externally applied pressure of the sensor increases, the resonance wavelength is increased; when the externally applied pressure is reduced, the resonance wavelength is reduced. A light source is replaced by the light source the wavelength of which is close to a surface plasmon resonance wavelength, and a loss spectrum analysis method is utilized to determine a position where surface plasmon resonance occurs. According to the invention, the external temperature and the pressure can be analyzed and detected once at the same time.

In a vertical cavity surface-emitting semiconductor laser device, first and second resonance wavelengths which are different are provided while a first resonator and a second resonator are coupled optically, and a gain of an active layer at the first resonance wavelength on the side of short wavelength is higher than that at the second resonance wavelength on the side of long wavelength. An absorption coefficient of an optical absorption layer when no electric field is applied is small for the first and second resonance wavelengths, and when an electric field is applied, an absorption coefficient of the optical absorption layer for the first resonance wavelength on the side of short wavelength is larger than that for the second resonance wavelength on the side of long wavelength.

A wavelength division multiplexing system based on arrays of wavelength tunable lasers and wavelength tunable resonant photodetectors is disclosed. The system allows self-adjusting of the resonance wavelength of the wavelength tunable photodetectors to the wavelengths of the laser light emitted by the lasers. No precise wavelength stabilization of the lasers is required.

The invention discloses an integrated reconfigurable optical add-drop multiplexer. A reconfigurable optical add-drop multiplexer unit adopts a cascade adjustable double microring resonator as a basic unit and comprises a plurality of cascade adjustable double microring resonators, wherein each cascade adjustable double microring resonator comprises two straight waveguides which are not crossed and two disc waveguides with different radiuses; the two disc waveguides are positioned between the two straight waveguides and keep preset coupling distances with the two straight waveguides; and a preset coupling distance is also kept between the two disc waveguides. In the invention, mature process techniques are used, so the element has a compact structure and has high expandability and stability; a method of cascading double rings with different radiuses is used to expand a free spectrum range (FSR), so the number of channels is increased and the information throughput of the element is increased; the stability of the element is improved by using the filter characteristic of a double ring flat top; the resonance wavelength can be adjusted dynamically by using the thermo-optic effect to adjust microrings; and thus, the reconfigurable optical add-drop multiplexer if formed.

The invention concretely discloses a surface-enhanced Raman scattering underlay of a #-shaped nano electromagnetic super medium, belonging to the technical field of surface optical spectrum. The underlay consists of a substrate and #-shaped nano metal structural units which are periodically arranged on the substrate to form a two-dimensional array on the substrate. The underlay of the invention has two-waveband electromagnetic field resonance response, high electromagnetic filed and Raman scattering enhanced effect, high stability and reproducibility; resonance wavelength can be adjusted within the range from visible light to near infrared light (from blue light to near infrared light) and cover most of laser wavelength of modern Raman spectrum technology; the simple structure is a single-layer plane structure capable of being realized by panel nanoimprint technology and suitably being manufactured in large scale; and the obtained underlay unit is arranged tidily, thereby greatly improving the reproducibility of the surface-enhanced Raman scattering test.

By introducing magneto-optical garnets with high Faraday rotation and low optical loss in a ring resonator, a nonreciprocal phase shift is generated to split the resonance wavelengths of clockwise and counter-clockwise modes under magnetic field. There are three main applications based on this nonreciprocal effect, optical isolators, optical circulators, and tunable optical filters. The concept of the tunable filters and the design of optical isolators for TE and TM modes are described in the paper. With proper optical ring isolator configurations, optical circulators can be realized.

The invention provides a micro-droplet sensing device and a method using the same to measure refractivity. A single mode fiber forms a taper area through tapering, two ends of the single mode fiber are connected with a wide-spectrum light source and a spectrograph respectively, the taper area is placed in environment liquid, and annular core fiber optical tweezers control a micro-droplet to be close to the taper area; light emitted by the wide-spectrum light source is transmitted in the single mode fiber, is coupled into the micro-droplet by means of an evanescent field when going through the taper area and generates resonance in the mode of an echo wall, transmission light intensity at a resonance wavelength is reduced sharply to form a resonance valley, and the spectrograph is used to collect transmission light for spectrum analysis. The annular core fiber optical tweezers are utilized to control the micro-droplet to enable the same to form a perfect ball cavity, so that the problem that a solid ball echo wall sensor cannot form echo wall resonance due to unsmooth and defective surface of a solid ball is solved, and the micro-droplet is more sensitive to environment changing. The micro-droplet sensing device has wide application in the aspect of environment monitoring.

The invention discloses an adjustable integration optical filter with an array type micro-resonator, relating to an optical filter and providing a realizable array type micro-resonator based on the existing micro-nano processing technique. The optical filter is provided with a substrate, a lower layer metallic film is arranged on the substrate, a dielectric layer is arranged on the lower layer metallic film, a metal grating layer is embedded in the middle of the dielectric layer and an upper layer metallic film is arranged on the dielectric layer. The metal grating layer is provided with a plurality of array units and the cycle of the metal grating in different array units is different. As the layer of dielectric layer embedded with the metal grating is arranged between the two layers of metallic films on the substrate and the metal grating in different integration units on a chip plane has different cycles, the equivalent refractive index in different units is regulated. When light wave goes through the adjustable integration optical filter of array type micro-resonator, different array units have different resonance wavelengths, therefore, a transmission passband is formed within certain wave spectrum width close to the resonance wavelength for the purpose of filtering.

Provided is a resonator using a three-dimensional photonic crystal. In the resonator, a range of choice of a resonance wavelength is wide and a desirable electric field distribution is obtained. The resonator according to the present invention includes a plurality of point defects provided in the three-dimensional photonic crystal. At least one of the plurality of point defects does not include a eigenmode in a photonic band gap of the three-dimensional photonic crystal.

To provide a tunable laser with high reliability and high performance, and of low cost.A tunable laser (10) comprises a double ring resonator (11) where ring resonators (111, 112) of different sizes are coupled through a directional coupler (122), an LD side waveguide (13) connected at one end (131) to the ring resonator (111) through a directional coupler (123), a reflection side waveguide (14) connected at one end (141) to the ring resonator (112) through a directional coupler (123), a PLC board (15) on which the ring resonator (111) and the like are formed, a high reflection film (16) provided at the other end (142) of the reflection side waveguide (14), an LD chip (17) having a low reflection film (18) formed on either of two opposing emission end faces (171, 172) and coupled optically with the other end (132) of the LD side waveguide (13), and film-like heaters (191-194) for varying the resonance wavelength of the double ring resonator (11).

In an optical device, a ring-resonator modulator, having an adjustable resonance (center) wavelength, receives an optical signal that includes a carrier wavelength from an input-output optical waveguide. Then, a monitoring mechanism monitors a performance metric (such as an average power or a signal swing) of a monitor optical signal from the ring-resonator modulator. Moreover, control logic in the optical device adjusts the resonance wavelength based on the monitored performance metric so that the resonance wavelength is locked to the carrier wavelength. In particular, the control logic may apply a change to an adjustment signal that is provided to the ring-resonator modulator. If the change increases the performance metric, the control logic may continue to modify the resonance wavelength. Otherwise, the control logic may modify the resonance wavelength by applying one or more changes, having an opposite sign to the change, to the adjustment signal.