摘要:
An infrared photodiode structure is provided. The infrared photodiode structure includes a doped semiconductor layer having ions of certain conductivity. An active photodetecting region is positioned on the doped semiconductor layer for detecting an infrared light signal. The active photodetecting region includes one or more amorphous semiconductor materials so as to allow for high signal-to-noise ratio being achieved by invoking carrier hopping and band conduction, under dark and illuminated conditions.
摘要:
A phototransistor includes an emitter and a base that comprises Ge. A collector comprises Si. The base, emitter, and collector form at least one Si/Ge heterojunction allowing the unpinning of Fermi energy level (EF) of the phototransistor.
摘要:
A planar mid-infrared (mid-IR) integrated microphotonic platform includes at least one laser performing lasing functions. The at least one laser comprises chalcogenide glass. At least amplifier structure is coupled to the at least one laser for performing optical amplification. The at least amplifier structure comprises chalcogenide glass. At least one waveguide structure is coupled to the at least one amplifier structure for guiding an optical signal in the microphotonic platform. The at least waveguide structure comprises chalcogenide glass. At least one modulator structure is coupled to the at least one waveguide structure for modulating the optical signal. The at least modulator structure comprises chalcogenide glass. At least one photodetector is coupled to the at least one modulator structure for performing photodetecting functions of the microphotonic platform. The at least photodetector comprises chalcogenide glass. At least one optical sensor is coupled to the at least one photodetector for performing optical sensing functions of the microphotonic platform. The at least optical sensor comprises chalcogenide glass.
摘要:
A ring resonator structure includes a semiconductor substrate, a core, and a cladding. Either the core or the cladding comprises chalcogenide glass to improve electromagnetic confinement in the ring resonator structure.
摘要:
The invention provides a waveguide with a waveguide core having longitudinal sidewall surfaces, a longitudinal top surface, and a longitudinal bottom surface that is disposed on a substrate. An interface layer is disposed on at least one longitudinal sidewall surface of the waveguide core. A waveguide cladding layer is disposed on at least the waveguide core sidewall and top surfaces, over the interface layer. The waveguide of the invention can be produced by forming a waveguide undercladding layer on a substrate, and then forming a waveguide core on the undercladding layer. An interface layer is then formed on at least a longitudinal sidewall surface of the waveguide core, and an upper cladding layer is formed on a longitudinal top surface and on longitudinal sidewall surfaces of the waveguide core, over the interface layer.
摘要:
A lateral photodiode, with improved response speed, includes a semiconductor substrate having active regions, and a p-type region and an n-type region arranged parallel to the surface of the substrate. The active regions are an n-layer and a p-layer respectively, and stacked in the thickness direction of the substrate to form a p-n junction. In addition, a barrier layer, for preventing movement of carriers from the substrate toward the active region, is provided on the side of the active regions toward the substrate.
摘要:
The mode transforming structure includes a first waveguide structure. A slot waveguide region is coupled to the first waveguide structure. The slot waveguide region includes one or more complementary tapered pairs so near lossless transforming between the first waveguide structure and the slot waveguide region occurs so as to allow optical modes to be transferred between the first waveguide and the slot waveguide region.
摘要:
A method for enhancing photoluminescence includes providing a film disposed over a substrate, the film including at least one of a semiconductor and a dielectric material. A first annealing step is performed at a first temperature in a processing chamber or annealing furnace; and, thereafter, a second annealing step is performed at a second temperature in the processing chamber or annealing furnace. The second temperature is greater than the first temperature, and the photoluminescence of the film after the second annealing step is greater than the photoluminescence of the film without the first annealing step.
摘要:
An optical device includes at least two photonic bandgap crystal (PBG) stacks that are each comprised of alternating layers of high and low index materials. A defect region is formed in a cavity region between the at least two photonic bandgap crystal stacks so as to provide the properties needed to reflect light received by the optical device.
摘要:
The light-guiding structure includes a waveguide structure that comprises a substrate and a low refractive index underclad material. The waveguide structure is oxidized to form an oxidized layer on a surface of the waveguide structure. The oxidized layer is isotropically etched after the reaction-limited oxidation regime is approaching the diffusion-limited regime and repeatedly oxidized and etched so that the waveguide structure is continuously oxidized in the reaction-limited regime, reducing the overall time of oxidation and volume of oxidized material so that the waveguide structure has its sidewall roughness reduced efficiently enabling high transmission rates of guided light.