Abstract: An apparatus comprising at least one photonic crystal cavity includes a grating comprising a first dielectric material and a nanobeam comprising a second dielectric material deposited on a surface of the grating, wherein a longitudinal axis of the nanobeam is oriented at a non-parallel angle to the grating. A photonic system comprises a photonic crystal cavity comprising a dielectric grating and a dielectric nanobeam deposited on a surface of the grating. A longitudinal axis of the nanobeam is oriented in a non-parallel arrangement to the grating, and a first distal region of the photonic crystal cavity is affixed to a substrate. A piezoelectric component comprises a free-floating distal region connected to a second distal region of the photonic crystal cavity. A voltage source is configured to apply a voltage to the piezoelectric component, generating strain in the photonic crystal cavity.

Abstract: A photonic system including a cantilever, the cantilever including a plurality of waveguides spaced from one another in a width of the cantilever to project a plurality of respective beams, the plurality of respective beams spaced with a uniform pitch from one another along a dimension of the width, and a piezoelectric layer, the photonic system including one or more voltage sources to apply a voltage across the piezoelectric layer, such that the cantilever deflects along a length of the cantilever when the voltage is applied and a controller to drive the voltage to cause a center point of a tip of the cantilever to translate in a two-dimensional Lissajous pattern.

Abstract: A cantilever that includes a first dielectric layer with a first intrinsic stress, a second dielectric layer overlaying the first dielectric layer, in which the second dielectric layer has a second intrinsic stress that is different than the first intrinsic stress, the cantilever including a first piezoelectric segment disposed between the first dielectric layer and the second dielectric layer at a first position with respect to a first dimension parallel to the first dielectric layer, the cantilever including a second piezoelectric segment disposed between the first dielectric layer and the second dielectric layer at a second position with respect to the first dimension, and the cantilever including one or more waveguides patterned in the second dielectric layer.

Abstract: A new architecture for a photoelectric logic gate is disclosed. This architecture is energy-efficient, realizes a strong optical nonlinearity, and can be directly realized in modern photonics foundries without process modifications, enabling immediate application to current-day photonic systems. The new architecture utilizes the integration of current onto the intrinsic capacitance of the optical modulator.

Abstract: The present application discloses methods and apparatus for arranging atoms in arrays. A system for arranging atoms within a 3-dimensional space includes an optical system (920) operable to produce a plurality of switchable optical traps (925) within the 3-dimensional space, a sensor (930) configured to detect atoms within the plurality of switchable optical traps, a scanner (990) operable to simultaneously move multiple atoms within the plurality of switchable optical traps, and at least one controller (905) configured to operate the optical system and the scanner to sort atoms within the plurality of switchable optical traps into a desired configuration of atoms, said operation of the optical system and the scanner being based at least in part on sensor data generated by the sensor detecting atoms within the plurality of switchable optical traps.

Abstract: A cantilever may include a first dielectric layer that has a first intrinsic stress and a second dielectric layer overlying the first dielectric layer that has a second intrinsic stress that is different than the first intrinsic stress. The difference between the first and second intrinsic stresses may cause the cantilever to curve. A second dielectric layer can comprise a plurality of crossbars oriented at an angle relative to a length of the cantilever to reduce curvature in a width direction of the cantilever. The second dielectric layer can be patterned with a waveguide. The cantilever may be piezoelectrically actuated.

Abstract: Systems and methods for hybrid integration of ultra-low loss waveguide photonic circuits with various efficient on-chip elements are described. The photonic circuits can integrate various elements including (but not limited to): gain, modulation, detection, and nonlinear optical elements. The integrated photonic chips can be manufactured in a flexible, reconfigurable, 3D heterogeneous platform. The integrated photonic chips can cover wavelength ranges from the visible wavelength to infrared wavelength.

Abstract: The present application discloses methods and apparatus for optically addressing qubits. An optical addressing system includes a source of electromagnetic radiation, at least one multi-frequency modulator configured to modulate electromagnetic radiation generated by the source of electromagnetic radiation to simultaneously produce at least two beams of electromagnetic radiation having different frequencies, each of which is configured to, when applied to multi-level quantum objects, at least partially drive one or more transitions between energy levels of the multi-level quantum objects, and a router configured to selectively direct the at least two beams of electromagnetic radiation to the multi-level quantum objects.

Abstract: 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.

Abstract: A scalable point defect qubit control system may include a diamond waveguide array comprising one or more diamond waveguides and a microwave line disposed proximally to the diamond waveguide array. Each diamond waveguide in the diamond waveguide array may include one or more qubits encoded in point defect sites. The microwave line may be configured to receive a direct current (DC) signal configured to shift an energy level of each point defect qubit of the one or more point defect qubits based on a position of the point defect in the diamond waveguide array, and receive an alternating current (AC) signal configured to control a quantum state of a point defect qubit of the one or more point defect qubits, wherein one or more properties of the AC signal are based on the shift in the energy level induced by the DC signal.

Abstract: A method for controlling a qubit encoded in an atom-like defect in a solid-state host may comprise applying an electrical signal to a piezoelectric cantilever that is mechanically coupled to a photonic waveguide comprising one or more embedded point defect sites. The photonic waveguide may be optically coupled to a photonic chip. Applying the electrical signal to the piezoelectric cantilever may induce movement in the piezoelectric cantilever, which may induce a strain in the photonic waveguide. The applied electrical signal may be determined by a defect site with excitation light, measuring a frequency of a photon emitted by the excited defect site, determining a frequency shift based on the measured frequency of the emitted photon, and determining the electrical signal to be applied to the piezoelectric cantilever based on the frequency shift.

Abstract: Provided herein is a photonic modulator and methods for controlling a photonic modulator that can control the phase and/or amplitude of photons being transmitted through the modulator to minimize photonic loss while remaining power efficient and operating at high speeds. The photonic modulator can include a substrate with a pair of piezoelectric cantilevers spaced apart from one another by a gap, with a photonic waveguide disposed in the substrate that extends across the modulator and bridges the gap between the piezoelectric cantilevers. In one or more examples, the piezoelectric cantilevers can be configured to move away from the substrate in response to an electrical signal, such that a refractive index of the photonic waveguide is altered.

Abstract: The present application discloses methods and apparatus for arranging atoms in arrays. A system for arranging atoms within a 3-dimensional space includes an optical system (920) operable to produce a plurality of switchable optical traps (925) within the 3- dimensional space, a sensor (930) configured to detect atoms within the plurality of switchable optical traps, a scanner (990) operable to simultaneously move multiple atoms within the plurality of switchable optical traps, and at least one controller (905) configured to operate the optical system and the scanner to sort atoms within the plurality of switchable optical traps into a desired configuration of atoms, said operation of the optical system and the scanner being based at least in part on sensor data generated by the sensor detecting atoms within the plurality of switchable optical traps.

Abstract: Disclosed are dielectric cavity arrays with cavities formed by pairs of dielectric tips, wherein the cavities have low mode volume (e.g., 7*10?5 ?3, where ? is the resonance wavelength of the cavity array), and large quality factor Q (e.g., 106 or more). Applications for such dielectric cavity arrays include, but are not limited to, Raman spectroscopy, second harmonic generation, optical signal detection, microwave-to-optical transduction, and as light emitting devices.

Abstract: 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.

Abstract: Disclosed are dielectric cavity arrays with cavities formed by pairs of dielectric tips, wherein the cavities have low mode volume (e.g., 7*10?5?3, where X is the resonance wavelength of the cavity array), and large quality factor Q (e.g., 106 or more). Applications for such dielectric cavity arrays include, but are not limited to, Raman spectroscopy, second harmonic generation, optical signal detection, microwave-to-optical transduction, and as light emitting devices.

Abstract: 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.

Abstract: An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.

Abstract: An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.

Abstract: Modulating graphene's optical conductivity with an electrolyte nanopatterning technique reduces or eliminates scattering loss caused by rough edges from etching. This technique uses a resist mask patterned with features as small as 30 nm to shield graphene from ions in an electrolyte. It can provide a carrier density variation of about 1014 cm?2 across a length of just 15 nm. And it can be combined with a technique of growing or transferring graphene on atomically smooth hexagonal boron nitride (hBN) to increase graphene's carrier mobility, e.g., to 10,000 cm2/(V·s) or more. The resulting graphene metamaterials can be used to make voltage-tunable electro-optical devices, such as beam-steering devices, electro-optical switch and modulators, and reconfigurable holograms.