Abstract: A technique for simulating and optimizing the fabrication and design of a physical device is described. The technique includes executing a fabrication simulation of the physical device with a fabrication model that receives a fabrication specification as input and outputs a structural design for the physical device in response to the fabrication simulation. An operational simulation of the physical device is executed with a design model that simulates a field response propagating through a simulated environment of the physical device. The structural design output from the fabrication model is forward cascaded to the design model and an output from backpropagation of a performance loss error through the design model is reverse cascaded to the fabrication model.

Abstract: A multi-channel photonic demultiplexer includes an input region to receive a multi-channel optical signal including four distinct wavelength channels, four output regions, each adapted to receive a corresponding one of the four distinct wavelength channels demultiplexed from the multi-channel optical signal, and a dispersive region optically disposed between the input region and the four output regions. The dispersive region includes a first material and a second material inhomogeneously interspersed to form a plurality of interfaces that each correspond to a change in refractive index of the dispersive region and collectively structure the dispersive region to optically separate each of the four distinct wavelength channels from the multi-channel optical signal and respectively guide each of the four distinct wavelength channels to the corresponding one of the four output regions.

Abstract: A computer-implemented method for revising structural parameters of a physical device is provided. The method comprises configuring a simulated environment to be representative of the physical device based on an initial description that describes structural parameters of the physical device. The method further includes performing an operational simulation of the physical device based on training data representative of physical stimuli within a physical domain to simulate an interaction between the physical device and the physical stimuli. The method further includes computing a loss value based on a simulated output of the physical device and performing and adjoint simulation by backpropagating the loss value through the simulated environment. The method also includes generating a revised description of the physical device by updating the structural parameters to reduce the loss value.

Abstract: A method and system for optimizing structural parameters of an electromagnetic device is described that includes performing operations. The operations include performing a time-forward simulation of a field response in a simulated environment describing the electromagnetic device and extracting decomposition components from the field response to compute a loss value. The operations further include backpropagating the loss value backwards in time using the decomposition components to determine an influence of changes in the structural parameters of the electromagnetic device on the loss value. The operations further include generating a revised description of the electromagnetic device by updating the structural parameters to reduce the loss value.

Abstract: A physical voxel, a volumetric testbed, and method for physically simulating a photonic device are described herein. The volumetric testbed comprises a simulation stage and a controller. The simulation stage includes a three-dimensional array of a physical voxels configurable to represent the photonic device operating in response to electromagnetic radiation. The physical voxels includes a field detector to measure a local field response and an impedance adjuster to adjust an impedance to the electromagnetic radiation. The controller is coupled to memory which stores instructions that when executed by one or more processors included in the controller causes the volumetric testbed to perform operations including determining a global field response of the photonic device and adjusting the impedance of the physical voxels to refine a design of the photonic device.

Abstract: Systems and methods described herein may relate to wireless energy transfer between a transmitter and a receiver via resonant coupling. In example embodiments, a method includes identifying a receiver in a wireless power transmission system and identifying a transmitter in the wireless power transmission system. The method also includes determining a real-time per-unit offer corresponding to the identified receiver and determining a real-time per-unit request corresponding to the identified transmitter. The method yet further includes determining a real-time per-unit match based on the offer and the request. The method further includes, in response to determining the match, causing the transmitter to provide electrical energy to the receiver via a wireless resonant coupling link.

Abstract: Disclosed herein is a method of determining an operational configuration of a wireless power adapter. The method includes determining whether the wireless power adapter is calibrated to supply a legacy device with electrical energy. The method further includes, in response to determining that the wireless power adapter is not calibrated to supply the legacy device with electrical energy, delivering a first power signal to the legacy device via a first electrical coupling member. The method also includes detecting a response of the legacy device to receiving the first power signal, and based on the response of the legacy device, determining an operational configuration of the wireless power adapter. Furthermore, the method includes configuring the wireless power adapter to operate according to the determined operational configuration.

Abstract: Disclosed herein are systems and methods for providing wireless power. The method includes determining a route in an area for a charger vehicle, where the charger vehicle includes a primary wireless power transceiver. The method further includes determining a schedule according to which the charger vehicle travels along the route. The method also includes determining a number of repeater vehicles to deploy in the area to extend a range of the primary transceiver of the charger vehicle. Further, the method includes deploying the determined number of repeater vehicles into the area. Furthermore, the method includes coupling each of the repeater vehicles to the charger vehicle via a respective first wireless resonant coupling link.

Abstract: Described herein are methods and systems for facilitating a wireless power handover. In particular, a controller may cause a first transmitter to provide electrical power to a receiver. The controller may then determine that a handover condition is met and may responsively facilitate a handover to a second transmitter. During this handover, the controller may engage in a phase-determination process to determine first and second phases at which the first and second transmitters should respectively provide electrical power to the receiver. Once determined, the controller may then cause the first and second transmitters to respectively provide electrical power to the receiver at the first and second phases and at substantially the same time. Subsequently, the controller may cause the first transmitter to no longer provide electrical power to the receiver and the second transmitter to continue to provide electrical power to the receiver, thereby completing the handover.

Abstract: The present disclosure relates to systems, devices, and methods for calibrating a light field projection system. One example system includes a projection unit operable to project a scanning sequence toward a screen having convex reflective elements. The scanning sequence is modulated according to a baseline intensity profile. The system also includes a calibration device disposed such that a portion of the scanning sequence is intercepted by the calibration device. The calibration device includes a first light detector arranged to detect an intercepted intensity profile. The calibration device also includes a second light detector arranged to detect a reflected portion of the scanning sequence as a measured intensity profile. The system further includes a control system. The control system is configured to determine an expected intensity profile and to modify operation of the light field projection system based on a comparison of the measured intensity profile to the expected intensity profile.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for receiving brain activity data of a user from a brainwave sensor and user physiological data from a non-brainwave sensor, where the brain activity data represents a brainwave pattern related to a physiological activity of the user and a brainwave pattern related to a mental activity of the user. Identifying a physiological action of the user based on the user physiological data. Identifying, within the brain activity data, a pattern that is representative of the identified physiological action. Filtering the brain activity data to lessen a contribution of the pattern representative of the identified physiological action to the brain activity data, thereby, providing filtered brain activity data.

Abstract: Described herein are methods and systems for facilitating a wireless power handover. In particular, a controller may cause a first transmitter to provide electrical power to a receiver. The controller may then determine that a handover condition is met and may responsively facilitate a handover to a second transmitter. During this handover, the controller may engage in a phase-determination process to determine first and second phases at which the first and second transmitters should respectively provide electrical power to the receiver. Once determined, the controller may then cause the first and second transmitters to respectively provide electrical power to the receiver at the first and second phases and at substantially the same time. Subsequently, the controller may cause the first transmitter to no longer provide electrical power to the receiver and the second transmitter to continue to provide electrical power to the receiver, thereby completing the handover.

Abstract: The present disclosure relates to systems, devices, and methods for calibrating a light field projection system. One example system includes a projection unit operable to project a scanning sequence toward a screen having convex reflective elements. The scanning sequence is modulated according to a baseline intensity profile. The system also includes a calibration device disposed such that a portion of the scanning sequence is intercepted by the calibration device. The calibration device includes a first light detector arranged to detect an intercepted intensity profile. The calibration device also includes a second light detector arranged to detect a reflected portion of the scanning sequence as a measured intensity profile. The system further includes a control system. The control system is configured to determine an expected intensity profile and to modify operation of the light field projection system based on a comparison of the measured intensity profile to the expected intensity profile.

Abstract: Systems and methods described herein may relate to wireless energy transfer between a transmitter and a receiver via resonant coupling. In example embodiments, a method includes identifying a receiver in a wireless power transmission system and identifying a transmitter in the wireless power transmission system. The method also includes determining a real-time per-unit offer corresponding to the identified receiver and determining a real-time per-unit request corresponding to the identified transmitter. The method yet further includes determining a real-time per-unit match based on the offer and the request. The method further includes, in response to determining the match, causing the transmitter to provide electrical energy to the receiver via a wireless resonant coupling link.

Abstract: The present disclosure relates to systems and methods for projecting a light field. One light field projection system includes a screen and a projection unit. On the screen, there is a plurality of convex reflective elements arranged in a two-dimensional array. The projection unit has a light source. The projection unit also has a modulator to modulate light from the light source. The projection unit further has one or more movable mirrored elements to reflect light from the light source toward the screen to sequentially scan the plurality of convex reflective elements. The projection unit also has a control system that determines a light modulation scheme used by the modulator. The light modulation scheme provides that the light reflected from the light source toward the screen to sequentially scan the plurality of convex reflective elements forms a light field that is concurrently viewable from a plurality of perspectives.

Abstract: The present disclosure relates to methods for calibrating a light field projection system that includes a screen having convex reflective elements. One example method for calibrating a light field projection system includes scanning the plurality of convex reflective elements with light modulated according to a baseline intensity profile. The method also includes detecting a light intensity profile of the scanned light using a light detector at a first perspective. The method further includes comparing the detected light intensity profile to an expected light intensity profile and modifying operation of a control system that determines light field modulation schemes for projecting light fields to account for any differences between the detected intensity profile and the expected intensity profile. The detector may be moved to a second perspective and the previously steps of the method may be repeated from the second perspective of the light detector.