Patent • #US11163115B1. In an optical apparatus, an introduced semiconductor device is heterointegrated on a silicon-based platform containing a silicon-based waveguide. A polymeric waveguide is optically coupled to the introduced semiconductor device and overlies at least a portion of the silicon-based waveguide. The polymeric waveguide is conformed as a multimode interference (MMI)...
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Optical data latch
Patent • #US7787719B1. An optical data latch is formed on a substrate from a pair of optical logic gates in a cross-coupled arrangement in which optical waveguides are used to couple an output of each gate to an photodetector input of the other gate. This provides an optical bi-stability which can be...
Optical devices enabled by vertical dielectric Mie resonators
Patent • #US11017186B2. Dielectric resonators provide a building block for the development of low-loss resonant metamaterials because they replace lossy ohmic currents of metallic resonators with low-loss displacement currents. The spectral locations of electric and magnetic dipole resonances of a dielectric resonator can be tuned by varying the resonator geometry so that...
Optical displacement sensor
Patent • #US7355720B1. An optical displacement sensor is disclosed which uses a vertical-cavity surface-emitting laser (VCSEL) coupled to an optical cavity formed by a moveable membrane and an output mirror of the VCSEL. This arrangement renders the lasing characteristics of the VCSEL sensitive to any movement of the membrane produced by sound,...
Optical domain analog to digital conversion methods and apparatus
Patent • #US8725004B1. Methods and apparatus for optical analog to digital conversion are disclosed. An optical signal is converted by mapping the optical analog signal onto a wavelength modulated optical beam, passing the mapped beam through interferometers to generate analog bit representation signals, and converting the analog bit representation signals into an...
Optical NAND gate
Patent • #US7995877B1. An optical NAND gate is formed from two pair of optical waveguide devices on a substrate, with each pair of the optical waveguide devices consisting of an electroabsorption modulator and a photodetector. One pair of the optical waveguide devices is electrically connected in parallel to operate as an optical...
Optical NOR gate
Patent • #US8014639B1. An optical NOR gate is formed from two pair of optical waveguide devices on a substrate, with each pair of the optical waveguide devices consisting of an electroabsorption modulator electrically connected in series with a waveguide photodetector. The optical NOR gate utilizes two digital optical inputs and a continuous...
Optical set-reset latch
Patent • #US8363990B1. An optical set-reset (SR) latch is formed from a first electroabsorption modulator (EAM), a second EAM and a waveguide photodetector (PD) which are arranged in an optical and electrical feedback loop which controls the transmission of light through the first EAM to latch the first EAM in a light-transmissive...
Optical System Measuring Thermomechanical Response to Heating
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Optical tags comprising rare earth metal-organic frameworks
Patent • #US11767468B2. Optical tags provide a way to identify assets quickly and unambiguously, an application relevant to anti-counterfeiting and protection of valuable resources or information. The present invention is directed to a tag fluorophore that encodes multilayer complexity in a family of heterometallic rare-earth metal-organic frameworks (RE-MOFs) based on highly connected...
Optical XOR gate
Patent • #US8582931B1. An optical XOR gate is formed as a photonic integrated circuit (PIC) from two sets of optical waveguide devices on a substrate, with each set of the optical waveguide devices including an electroabsorption modulator electrically connected in series with a waveguide photodetector. The optical XOR gate utilizes two digital...
Optically configurable charge-transfer materials and methods thereof
Patent • #US11222249B2. The present invention relates to an optical code including a film of a charge-transfer material, as well as methods thereof. Described herein are optical codes having anisotropic and/or isotropic regions within the film, which can be provided in a pattern that serves as an optical code.
Optically configurable charge-transfer materials and methods thereof
Patent • #US11010651B1. The present invention relates to an optical code including a film of a charge-transfer material, as well as methods thereof. Described herein are optical codes having anisotropic and/or isotropic regions within the film, which can be provided in a pattern that serves as an optical code.
Optically pumped gradient magnetometer
Patent • #US11543474B1. A method is provided for sensing a magnetic field in a magnetic gradiometer of the kind in which pump light and light constituting an optical carrier traverse first and second atomic vapor cells that contain host atoms and that are separated from each other by a known distance. According...
Optically pumped, radio-frequency atomic magnetometry with feedback stabilization
Patent • #US11821966B1. An optically pumped, atomic magnetometer incorporates a feedback system for stabilizing the magnetic bias field and suppressing unwanted background fields. The magnetic bias field is applied to a vapor cell containing host atoms of two different species, each of which resonates at a different Larmor frequency when both are...
Optically Reconfigurable Charge-Transfer Liquid Crystals
Featured Opportunity • Multifunctional organic optically re-writeable (ORW) materials with enhanced tunability, micron scale accuracy, compatibility with diverse substrates, and self-healing properties Demonstration of writing and rewriting of two distinct data matrix barcode patterns into an aligned DACLCs (Resolution < 10 µm). Since the rise of liquid crystal displays (LCDs), organic liquid crystals...
Optically transduced MEMS gyro device
Patent • #US8726730B1. A bulk micromachined vibratory gyro in which a proof mass has a bulk substrate thickness for a large mass and high inertial sensitivity. In embodiments, optical displacement transduction is with multi-layer sub-wavelength gratings for high sensitivity and low cross-talk with non-optical drive elements. In embodiments, the vibratory gyro includes...
Optically transduced MEMS magnetometer
Patent • #US8674689B1. MEMS magnetometers with optically transduced resonator displacement are described herein. Improved sensitivity, crosstalk reduction, and extended dynamic range may be achieved with devices including a deflectable resonator suspended from the support, a first grating extending from the support and disposed over the resonator, a pair of drive electrodes to...
Optimized Alumina Coagulants for Water Purification
Featured Opportunity • This innovative technology uses a water treatment coagulant, or reagent, to facilitate the process of water purification. By inserting a single gallium atom in the center of an aluminum oxide cluster, the stability and efficacy of the reagent is greatly improved. This stability also provides a longer shelf life, increased...
Optimized alumina coagulants for water treatment
Patent • #US8119011B1. Substitution of a single Ga-atom or single Ge-atom (GaAl12 and GeAl12 respectively) into the center of an aluminum Keggin polycation (Al13) produces an optimal water-treatment product for neutralization and coagulation of anionic contaminants in water. GaAl12 consistently shows ˜1 order of magnitude increase in pathogen reduction, compared to Al13....
Optimized microsystems-enabled photovoltaics
Patent • #US9141413B1. Technologies pertaining to designing microsystems-enabled photovoltaic (MEPV) cells are described herein. A first restriction for a first parameter of an MEPV cell is received. Subsequently, a selection of a second parameter of the MEPV cell is received. Values for a plurality of parameters of the MEPV cell are computed...
Optoelectronic apparatus enabled by dielectric metamaterials
Patent • #US10128387B1. An array of dielectric resonators is formed on the substrate of an optoelectronic device. Each resonator includes an active medium having an optical transition that is operative in a process of photodetection or photoemission. The dielectric resonators in the array are each dimensioned to provide a resonance that lies...
Optoelectronic system and apparatus for connection to biological systems
Patent • #US9907496B1. The present invention relates to a biological probe structure, as well as apparatuses, systems, and methods employing this structure. In particular embodiments, the structure includes a hermetically sealed unit configured to receive and transmit one or more optical signals. Furthermore, the structure can be implanted subcutaneously and interrogated externally....
Optomechanical force sensors, cantilevers, and systems thereof
Patent • #US10031158B1. An optomechanical force sensor includes a substrate, a cantilevered beam anchored to the substrate, and a probe tip positioned near an end of the cantilevered beam distal to the substrate. A suspended waveguide is disposed on the cantilevered beam and is optically continuous with an input/output waveguiding structure. An...
Optomechanical gyroscope utilizing the Sagnac effect
Patent • #US10458795B1. An apparatus and a method for detecting rotation based on the Sagnac effect is disclosed. Input light having sufficient power is injected into a circulating optical resonator to thereby excite an optomechanical oscillation of the resonator at an instantaneous mechanical angular frequency. Rotation of the circulating optical resonator causes...
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