Abstract:
Techniques to control light wavefronts are described herein. A plurality of sub-wavelength grating (SWG) layers includes a SWG layer. The SWG layer is arranged to control a light wavefront.
Abstract:
A broadband optical beam splitter can comprise a non-metallic high contrast grating (100) including a substrate (102) and an array of posts (104) attached to a surface (106) of the substrate. The grating can have a subwavelength period with respect to a preselected optical energy wavelength, the preselected optical energy wavelength within the range of 400 nm to 1.6 µm. Additionally, the broadband optical beam splitter can have a bandwidth of 80 nm to 120 nm and can have an optical energy loss of less than 5%.
Abstract:
A light-emitting diode (LED) (101). The LED (101) includes a plurality of portions including a p-doped portion (112), an intrinsic portion (114), and a n-doped portion (116). The intrinsic portion (114) is disposed between the p-doped portion (112) and the n-doped portion (116) and forms a p-i junction (130) and an i-n junction (134) The LED (101) also includes a metal-dielectric-metal (MDM) structure (104) including a first metal layer (140), a second metal layer (144), and a dielectric medium disposed between the first metal layer (140) and the second metal layer (144). The metal layers of the MDM structure (104) are disposed about orthogonally to the p-i junction (130) and the i-n junction (134); the dielectric medium includes the intrinsic portion (114); and, the MDM structure (104) is configured to enhance modulation frequency of the LED (101) through interaction with surface plasmons that are present in the metal layers.
Abstract:
A receiver circuit (120) for an optical communication system (100) includes an optical photodetector (115) which receives optical signals (150) and converts them into an electrical current. In one illustrative embodiment, the receiver circuit (120) includes a dynamic impedance circuit (203) switches the receiver circuit (120) between a high impedance state and a low impedance state and a buffer stage (212) which receives the electrical current and converts the electrical current into a voltage signal compatible with a digital circuit (216). A method for receiving an optical signal (150) includes, receiving the optical signal (150) and converting it into an electrical pulse train, switching a dynamic impedance circuit (200) between a high impedance state and a low impedance state, transforming the electrical pulse train into an output voltage signal using a buffer stage (212), and receiving the output voltage signal by a digital circuit (216).
Abstract:
A waveguide intersection (300) includes an input waveguide (205) and an output waveguide (210); a crossing waveguide (215) intersecting the input waveguide (205) and the output waveguide (210) to form an intersection (135); and a block (305, 310) that is optically joined to the intersection (135) such that a guided mode (405) is produced within the intersection (135). A method of reducing optical losses within a waveguide intersection (300) includes increasing a cross-sectional height of an intersection (135) such that optical energy (405) passing through the intersection (135) is laterally confined.
Abstract:
Embodiments of the present invention are directed to light-emitting diodes. In one embodiment of the present invention, a light-emitting diode comprises at least one quantum well sandwiched between a first intrinsic semiconductor layer and a second semiconductor layer. An n-type heterostructure is disposed on a surface of the first intrinsic semiconductor layer, and a p-type heterostructure is disposed on a surface of the second intrinsic semiconductor layer opposite the n-type semiconductor heterostructure. The diode also includes a metal structure disposed on a surface of the light-emitting diode. Surface plasmon polaritons formed along the interface between the metal-structure and the light-emitting diode surface extend into the at least one quantum well increasing the spontaneous emission rate of the transverse magnetic field component of electromagnetic radiation emitted from the at least one quantum well. In certain embodiments, the electromagnetic radiation can be modulated at a rate of about 10 Gb/s or faster.
Abstract:
A pixel source for a visual presentation is disclosed. The pixel source can include a light source, a large gamut pixel, a subtractive mask, and a control input to control the subtractive mask. A display device is also disclosed comprising a light source array with a large gamut pixel array and subtractive mask array disposed thereon. In operation, wide-band light emitted from each light source can be modulated by each large gamut pixel to output a plurality of primary colors. Each subtractive mask can be controlled to block, partially transmit, or fully transmit any number of the outputted primary colors to produce color points that can be interpolated and half-toned to output a large gamut of secondaries for each pixel.
Abstract:
Techniques related to optical devices including a high contrast grating (HCG) lens are described herein. In an example, an optical device includes a transparent substrate. A laser emitter or detector at a first side of the transparent substrate to emit or detect a laser light transmitted via the transparent substrate. A HCG lens is at a second side of the transparent substrate to transmit and refract the laser light.
Abstract:
Techniques relating to optical shuffling are described herein. In an example, a system for shuffling a plurality of optical beams is described. The system includes a plurality of sources to output respective beams of light. The system further includes a plurality of receivers to receive respective beams of light. The system further includes a shuffling assembly including a plurality of sub-wavelength grating (SWG) sections. Each of the plurality of SWG sections is for defining optical paths of the plurality of beams. The plurality of SWG sections includes at least one reflecting SWG section to reflect and direct light from a respective one of the plurality of sources toward a respective one of the plurality of receivers.
Abstract:
A tiled array display system includes a plurality of individual display devices positioned adjacent to each other in a tiled configuration. At least one mullion region is formed between adjacent ones of the display devices in which image information is not displayed by the display devices. At least one structure is configured to generate image information in the at least one mullion region to reduce visibility of the at least one mullion region.