Massachusetts Institute of Technology

Witricity Corporation

Erika Ye

Rajeev J Ram

Amir Hossein Atabaki

William F Herrington

Ningren Han

Marin Soljacic

Andre B Kurs

Arunanshu Mohan Roy

Damiano Patron

A non-paraxial Talbot spectrometer includes a transmission grating to receive incident light. The grating period of the transmission grating is comparable to the wavelength of interest so as to allow the Talbot spectrometer to operate outside the paraxial limit. Light transmitted through the transmission grating forms periodic Talbot images. A tilted detector is employed to simultaneously sample the Talbot images at various distances along a direction perpendicular to the grating. Spectral information of the incident light can be calculated by taking Fourier transform of the measured Talbot images or by comparing the measured Talbot images with a library of intensity patterns acquired with light sources having known wavelengths.

Apparatus, systems, and methods for talbot spectrometers

Apparatus, systems, and methods for Talbot spectrometers

A wireless power transmission system () includes a conductive waveguide () at least partially filled with a dielectric material (), the waveguide extending along a first direction (e.g., z-axis) from a first end () to an opposing end () thereof, the waveguide having a bottom face (), a top face () and a pair of side faces () that together form a substantially rectangular cross-section of the waveguide, the top face having a plurality of slots () oriented substantially orthogonal to the first direction and distributed between the first end and the opposing end, the slots separated from each other by a first distance (l) measured along the first direction. In one illustrative embodiment, the waveguide includes a plurality of barriers () interleaved with the plurality of slots, the barriers separated from each other by the first distance, each of the barriers extending between the top and bottom faces and having a barrier cross-section with an area smaller than an area of the waveguide cross-section and an input port () coupled with the first end of the waveguide, the input port configured to receive an input waveform () to be guided by the waveguide.

Radiative wireless power transmission

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Saratoga, CA, United States of America

Erika Ye