Patent application number | Description | Published |
20080212920 | Optical Circuits and Circuit Elements and Methods of Forming Same - Circuits and circuit elements adapted to function at optical or infrared frequencies are made from plasmonic and/or nonplasmonic particles disposed on a substrate, where the plasmonic and nonplasmonic particles have respective dimensions substantially smaller than a wavelength of an applied optical or infrared signal. Such particles are deposited on a substrate in a variety of shapes and sizes from a variety of plasmonic and/or nonplasmonic materials so as to form resistors, capacitors, inductors and circuits made from combinations of these elements. | 09-04-2008 |
20080289965 | System and Method for Controlling Nanoparticles Using Dielectrophoretic Forces - The present invention is directed to the use of dielectrophoretic forces for the arbitrary manipulation of micrometer- and nanometer-sized particles and to devices capable of arbitrarily manipulating micrometer- and nanometer-sized particles by means of dielectrophoretic forces within a two- or three-dimensional region. The devices and methods of the invention are capable of arbitrarily controlling the velocities, locations, and forces applied to a particle, arbitrarily specifying a force or set of forces at a location in space, and determining friction and/or drag coefficients of a particle, and are thus well-suited for a range of applications including cell sorting, drug delivery, as a diagnostic tool for determining membrane stiffness, and in the heterogeneous integration of micro- and nano-components through directed assembly. | 11-27-2008 |
20090080297 | FREQUENCY-MODULATED CODING AND DATA RECORDING AND STORAGE USING PLASMONIC NANOSTRUCTURES - A frequency-modulated coding and data recording and storage device that uses plasmonic-dielectric nanostructures of concentric two-layer core-shell design to store data includes a flat transparent substrate having a top surface divided into cells with side dimension d on the order of tens of nanometers and a core-shell plasmonic-dielectric nanostructure disposed in each cell. Each plasmonic nanostructure of concentric core-shell has a predetermined ratio of radii and a predetermined aspect ratio such that when an infrared or visible wavelength signal is applied to each said core-shell plasmonic-dielectric nanostructure a peak scattering amplitude of the applied signal is at different plasmonic resonance frequencies for core-shell plasmonic-dielectric nanostructures with different ratio of radii and different aspect ratios. The sampled values of a signal to be recorded are assigned to each cell and the ratio of radii and/or aspect ratios of the core-shell plasmonic-dielectric nanostructures in the assigned cells are selected to provide a corresponding plasmonic resonant frequency. | 03-26-2009 |
20100013965 | SEPARATION AND CONTRAST ENHANCEMENT OF OVERLAPPING CAST SHADOW COMPONENTS AND TARGET DETECTION IN SHADOW USING POLARIZATION - Shadow is an inseparable aspect of all natural scenes. When there are multiple light sources or multiple reflections several different shadows may overlap at the same location and create complicated patterns. Shadows are a potentially good source of information about a scene if the shadow regions can be properly identified and segmented. However, shadow region identification and segmentation is a difficult task and improperly identified shadows often interfere with machine vision tasks like object recognition and tracking. A shadow separation and contrast enhancement method based on the polarization of light is provided. Polarization information of scenes is captured by a polarization-sensitive camera and the scenes are processed to effectively separate shadows from different light sources. | 01-21-2010 |
20100277797 | GRATING STRUCTURE FOR SPLITTING LIGHT - A grating structure for splitting light. The grating structure including alternating ridges and grooves. The ridges and grooves are configured such that the grating directs p-polarization components of incident light to the −1 | 11-04-2010 |
20100277937 | GRATING STRUCTURE FOR DIRECTING NON-POLARIZED LIGHT - A grating structure having a fused silica base includes alternating ridges and grooves. The ridges and grooves form a fused silica to air interface. The ridges and grooves are configured such that the grating has a ratio between the effective refractive index difference between s-polarization and p-polarization of about 1/3. As such, for non-polarized light with an incident angle θ | 11-04-2010 |
20110139234 | GRATING STRUCTURE FOR DIVIDING LIGHT - A grating structure and a solar cell assembly. In one aspect, the grating structure suppresses the zero order transmission to near 0%. In another aspect, the solar cell assembly has improved absorption due to coupling with a grating structure. | 06-16-2011 |
20110181956 | OPTICAL DEVICE USING DIFFRACTION GRATINGS - A double-sided grating divider acts as a light switch where the upper and lower grating dividers are arranged to accommodate a relative lateral shift therebetween of about one-fourth of the period of the diffraction grating elements and where the critical refraction angles of the grating dividers are more than about 43.6°. Lateral shift may be achieved by various devices including MEMS and metal couplers having a known/calibrated thermal coefficient of expansion over a temperature range of interest. | 07-28-2011 |
20110181957 | OPTICAL LIGHT SWITCH USING DOUBLE-SIDED DIFFRACTION STRUCTURE - A light switch (or valve) made up of two mutually inverted, substantially identical diffraction gratings with a liquid medium therebetween, arranged to allow the grating substrates to be shifted laterally relative to one another so as to align and mis-align the grating elements. When aligned, incident-polarized light passes through the switch and when misaligned, light does not pass through the switch but is reflected. | 07-28-2011 |
20110205617 | REFLECTION-MINIMIZED PHOTONIC CRYSTAL AND DEVICE UTILIZING SAME - A photonic crystal structure that is composed of a host media having periodic dielectric holes disposed in the media at a period of a | 08-25-2011 |
20120038987 | OPTICAL DEVICE USING DOUBLE-GROOVE GRATING - Optical devices using double-groove diffraction gratings having periodic sets of TiO | 02-16-2012 |
20120075703 | OPTICAL DEVICE USING LATERALLY-SHIFTABLE DIFFRACTION GRATINGS - A double-sided grating divider acts as a light switch where the upper and lower grating dividers are arranged to accommodate a relative lateral shift therebetween of about one-fourth of the period of the diffraction grating elements and where the critical refraction angles of the grating dividers are more than about 43.6°. Lateral shift may be achieved by various devices including MEMS and metal couplers having a known/calibrated thermal coefficient of expansion over a temperature range of interest. | 03-29-2012 |
20120250140 | ACOUSTO-OPTIC SCANNER - An acousto-optic laser beam scanner of improved scanning angle scope is provided by introducing a controllable compound acoustic waveform into a light transmissive body wherein at least binary and binary diffraction grating patterns of both positive and negative sense can be introduced into the body, the period of the waveform determining the refraction angle magnitude and the order of the pulses determining the refraction angle direction. | 10-04-2012 |
20130163069 | MANIPULATING AND ROUTING OPTICAL SIGNAL NARROW PATHS ON GRAPHENE AND GRAPHENE AS A PLATFORM FOR METAMATERIALS - Graphene may support electromagnetic radiation and be able to support a variety of optical devices. In general, graphene may exhibit changeability in properties such as the conductivity and the like of graphene. Graphene may comprise carbon and be of a thickness of a single atomic layer. In another embodiment, Graphene may be thicker than a single atomic layer, but may be able to exhibit changeability in the properties noted above. Disclosed herein is the guiding and manipulating of optical signals on layers of graphene to create waveguides, ribbon waveguides, beamsplitters, lenses, attenuators, mirrors, scatterers, Fourier optics, Luneburg lenses, metamaterials and other optical devices. | 06-27-2013 |
20130271838 | OPTICAL DEVICE USING DOUBLE-GROOVE GRATING - Optical devices using double-groove diffraction gratings having periodic sets of TiO | 10-17-2013 |
20140144506 | GRATING STRUCTURE FOR DIVIDING LIGHT - A grating structure and a solar cell assembly. In one aspect, the grating structure suppresses the zero order transmission to near 0%. In another aspect, the solar cell assembly has improved absorption due to coupling with a grating structure. | 05-29-2014 |