Systems, methods, and apparatus for photonic crystals logic devices are disclosed. In one or more embodiments, a disclosed method for an optical logic device comprises radiating, by at least one source, at least one signal. The method further comprises reflecting at least one signal off of at least one photonic crystal, when at least one photonic crystal senses a physical phenomena of a threshold strength. Also, the method comprises not reflecting at least one signal off of at least one photonic crystal, when at least one photonic crystal does not sense the physical phenomena of the threshold strength. Further, the method comprises detecting or not detecting, by at least one detector, at least one signal.

A MEMS based device includes a phononic crystal body formed from unit cells and having a defect line extending through the phononic crystal body. Unit cells inside of the defect line lack a same phononic bandgap as the unit cells outside of the defect line. An input MEMS resonator is mechanically coupled to a first end of the defect line, and an output MEMS resonator is mechanically coupled to a second end of the defect line. Each of the unit cells outside of the defect line has an identical geometry. The input MEMS resonator and output MEMS resonator each have a natural frequency within the same phononic bandgap possessed by the unit cells outside of the defect line. There may be more than one defect line, and in such cases, the MEMS device may include more than one input MEMS resonator and/or more than one output MEMS resonator.

The invention relates to a microstructured optical fiber for generating incoherent supercontinuum light upon feeding of pump light. The microstructured optical fiber has a first section and a second section. A cross-section through the second section perpendicularly to a longitudinal axis of the fiber has a second relative size of microstructure elements and preferably a second pitch that is smaller than a blue edge pitch for the second relative size of microstructure elements. The invention also relates to an incoherent supercontinuum source comprising a microstructured optical fiber according to the invention.

The present invention discloses an high-contrast photonic crystal “OR”, “NOT” and “XOR” logic gate, comprising a six-port two-dimensional photonic crystal, a nonlinear cavity unit and a cross-waveguide logic gate unit; the high-contrast photonic crystal “OR” logic gate includes a first reference-light input port, two first idle ports, two first signal-input ports and a first signal-output port; the high-contrast photonic crystal “NOT” logic gate includes two second reference-light input ports, two second idle ports, a second signal-input port and a second signal-output port; and the high-contrast photonic crystal “XOR” logic gate includes a three reference-light input port, two three-idle ports, two three-signal input ports and a three-signal output port; the cross-waveguide logic gate unit is arranged with different input or output ports; and the nonlinear cavity unit is coupled with the cross-waveguide logic gate unit. The structure of the present invention is easy to integrate with other optical logic elements.

An optical neural network is constructed based on photonic integrated circuits to perform neuromorphic computing. In the optical neural network, matrix multiplication is implemented using one or more optical interference units, which can apply an arbitrary weighting matrix multiplication to an array of input optical signals. Nonlinear activation is realized by an optical nonlinearity unit, which can be based on nonlinear optical effects, such as saturable absorption. These calculations are implemented optically, thereby resulting in high calculation speeds and low power consumption in the optical neural network.

A coherent anti-stokes Raman scattering apparatus for imaging a sample includes an optical output; an optical source arranged to generate a first optical signal at a first wavelength; and a nonlinear element arranged to receive the first optical signal, where the nonlinear element is arranged to cause the first optical signal to undergo four-wave mixing on transmission through the nonlinear element such that a second optical signal at a second wavelength and a third optical signal at a third wavelength are generated, wherein an optical signal pair including two of the first, second and third optical signals is provided to the optical output for imaging the sample.

Described are composite photonic materials that incorporate magnetic nanoparticles inside hollow or solvent-filled nano-scale or micro-scale shells and methods of making and using such composite photonic materials. When these photonic materials are present in a magnetic field, they exhibit a change in reflected, scattered, and/or transmitted light as compared to when the materials are not in the presence of the magnetic field. This results in the materials appearing to have a different color, such as when observed by the human eye or a light detecting device, such as a camera.

The disclosed subject matter provides systems and methods for spatial and spectral modulation of light. An example system for modulating light can include a substrate and a plurality of meta units, coupled to the substrate and configured to spatially and spectrally modulate the light, wherein the plurality of meta units includes a perturbation and forms a perturbed lattice supporting a quasi-bound state in the continuum.

The present invention discloses a high-contrast photonic crystal AND logic gate, comprising a five-port two-dimensional photonic crystal, a nonlinear cavity unit and a Y-shape AND logic gate unit; and it includes a reference-light input port, two signal-input ports, a system signal-output port and an idle port; the nonlinear cavity unit is coupled with the Y-shape AND logic gate unit. The structure of the present invention, which is compact in structure and ease of integration with other optical logic elements, not only can realize the functions of the high-contrast photonic and logic gate, but also has high contrast of high and low logic output; and is widely applicable to optical communication bands.

A semiconductor-based light emitting platform (LEP) comprising a heated blackbody radiator wherein the light emitting platform is thermally isolated by nanowires having ultra-low thermal conductivity. In embodiments, the pixel is structured for broadband emission with a platform comprising an infrared surface structured for high emissivity within a broadband wavelength range. In other embodiments radiation is confined to a limited bandwidth by metamaterial and other resonant filters. In embodiments, the internal efficiency of the LEP configured for broadband operation can be higher compared with an LED.