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US 12,298,540 B2Granted
Plasma dispersion effect for metasurface tuning
AssigneeLuminar Technologies, Inc.
InventorsAditya Jain, Zoran Jandric, Dan Mohr, Kevin A. Gomez, Krishnan Subramanian
Life of this patent
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Abstract
An active metasurface that provides low-loss and high-bandwidth modulation control of light includes a number of cells arranged on a substrate. A controller dynamically alters a voltage differential supplied to the electrodes of each of the cells is adapted to alter refractive index of each of the high-index dielectric blocks in order to controllably steer light exiting the cell.
Claims19
A device, comprising:
- a metasurface comprising a number of cells arranged on a substrate, each of the cells including:
- a high-index dielectric block including an interface between a positively-doped material and a negatively-doped material;
- and
- electrodes configured to provide a voltage differential across the high-index dielectric block to flow current along a current path that passes through the high-index dielectric block, at least a portion of the current path being substantially parallel to a plane defined by the metasurface.
1 more element
A device for controlling a metasurface to steer light, the device comprising:
- a number of cells arranged on a substrate, each of the cells configured to receive light and including at least:
- a high-index dielectric block including an interface between a positively-doped material and a negatively-doped material;
- and
- electrodes configured to supply a voltage differential to the cell to flow current along a current path that passes through the high-index dielectric block, at least a portion of the current path being substantially parallel to a plane defined by the metasurface;
- and
- dynamically altering a voltage differential supplied to the electrodes of each of the cells to alter a refractive index of each of the high-index dielectric blocks in order to controllably steer light exiting the cell.
3 more elements
A system comprising:
- at least one cell including a high-index dielectric block including a junction between a positively-doped material and a negatively-doped material;
- electrodes arranged on opposite sides of the at least one cell and each being separated from a phase-shifting portion of the high-index dielectric block, and
- circuitry configured to supply a voltage differential to the electrodes and to dynamically alter the voltage differential to control a refractive index of the high-index dielectric block and thereby controllably steer light exiting the cell.
Dependencies are inferred from the claim text.