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US 11,604,364 B2Granted
Arbitrary polarization-switchable metasurfaces
AssigneePresident and Fellows of Harvard College
InventorsNoah A. Rubin, Jan Philipp Balthasar Mueller, Federico Capasso
Life of this patent
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Abstract
An optical component comprises a metasurface comprising nanoscale elements. The metasurface is configured to receive incident light and to generate optical outputs. The geometries and/or orientations of the nanoscale elements provide a first optical output upon receiving a polarized incident light with a first polarization, and provide a second optical output upon receiving a polarized incident light with a second polarization that is different from the first polarization.
Claims14
An optical component, comprising:
- a metasurface comprising nanoscale elements configured to receive incident light and to generate optical outputs;
- wherein geometries or orientations of the nanoscale elements provide a first optical output upon receiving a polarized incident light with a first polarization, and provide a second optical output upon receiving a polarized incident light with a second polarization that is different from the first polarization;
- and
- wherein the first polarization is an elliptical polarization,
- wherein the Jones vector of the first polarization of light is defined by:
- λ
- →
- +
- =
- [
- λ
- 1
- +
- λ
- 2
- +
- ]
- and the Jones vector of the second polarization of light is defined by:
- λ
- →
- -
- =
- [
- λ
- 1
- -
- λ
- 2
- -
- ]
- ,
- wherein the phase shift on the first polarization of light is defined by ϕ+(x,y) and the phase shift on the second polarization of light is defined by ϕ−(x,y),
- wherein the superscript * denotes the complex conjugate, and
- wherein the Jones matrix at each point (x,y) of the metasurface which defines the output when multiplied by the Jones vector of the polarized incident light is defined by:
- J
-
- (
- x
- ,
- y
- )
- =
- [
- e
- i
-
- ϕ
- +
- (
- x
- ,
- y
- )
- (
- λ
- 1
- +
- )
- *
- e
- i
-
- ϕ
- -
- (
- x
- ,
- y
- )
- (
- λ
- 1
- -
- )
- *
- e
- i
-
- ϕ
- +
- (
- x
- ,
- y
- )
- (
- λ
- 2
- +
- )
- *
- e
- i
-
- ϕ
- -
- (
- x
- ,
- y
- )
- (
- λ
- 2
- -
- )
- *
- ]
- [
- λ
- 1
- +
- λ
- 1
- -
- λ
- 2
- +
- λ
- 2
- -
- ]
- -
- 1
- .
122 more elements
An optical device, comprising:
- a metasurface comprising nanoscale elements, geometries or orientations of the nanoscale elements encoding a plurality of hologram phase profiles corresponding to a plurality of polarizations;
- wherein upon illumination by an incident light with a first polarization of the plurality of polarizations, the metasurface projects a first image based on a first hologram phase profile of the plurality of hologram phase profiles;
- wherein upon illumination by an incident light with a second polarization of the plurality of polarizations, the metasurface projects a second image based on a second hologram phase profile of the plurality of hologram phase profiles;
- and
- wherein the first polarization is an elliptical polarization,
- wherein the Jones vector of the first polarization of light is defined by:
- λ
- →
- +
- =
- [
- λ
- 1
- +
- λ
- 2
- +
- ]
- and the Jones vector of the second polarization of light is defined by:
- λ
- →
- -
- =
- [
- λ
- 1
- -
- λ
- 2
- -
- ]
- ,
- wherein the phase shift on the first polarization of light is defined by ϕ+(x,y) and the phase shift on the second polarization of light is defined by ϕ−(x,y),
- wherein the superscript * denotes the complex conjugate, and
- wherein the Jones matrix at each point (x,y) of the metasurface which defines the output when multiplied by the Jones vector of the polarized incident light is defined by:
- J
-
- (
- x
- ,
- y
- )
- =
- [
- e
- i
-
- ϕ
- +
- (
- x
- ,
- y
- )
- (
- λ
- 1
- +
- )
- *
- e
- i
-
- ϕ
- -
- (
- x
- ,
- y
- )
- (
- λ
- 1
- -
- )
- *
- e
- i
-
- ϕ
- +
- (
- x
- ,
- y
- )
- (
- λ
- 2
- +
- )
- *
- e
- i
-
- ϕ
- -
- (
- x
- ,
- y
- )
- (
- λ
- 2
- -
- )
- *
- ]
- [
- λ
- 1
- +
- λ
- 1
- -
- λ
- 2
- +
- λ
- 2
- -
- ]
- -
- 1
- .
123 more elements
An optical device, comprising:
- a metasurface comprising nanoscale elements;
- wherein geometries or orientations of the nanoscale elements are arranged such that the metasurface deflects incident light in different directions depending on polarization states of the incident light;
- and
- wherein the polarization states of the incident light comprise elliptical polarization states,
- wherein the incident light comprises a first polarization of light and a second polarization of light,
- wherein the Jones vector of the first polarization of light is defined by:
- λ
- →
- +
- =
- [
- λ
- 1
- +
- λ
- 2
- +
- ]
- and the Jones vector of the second polarization of light is defined by:
- λ
- →
- -
- =
- [
- λ
- 1
- -
- λ
- 2
- -
- ]
- ,
- wherein the phase shift on the first polarization of light is defined by ϕ+(x,y) and the phase shift on the second polarization of light is defined by ϕ−(x,y),
- wherein the superscript * denotes the complex conjugate, and
- wherein the Jones matrix at each point (x,y) of the metasurface which defines the output when multiplied by the Jones vector of the polarized incident light is defined by:
- J
-
- (
- x
- ,
- y
- )
- =
- [
- e
- i
-
- ϕ
- +
- (
- x
- ,
- y
- )
- (
- λ
- 1
- +
- )
- *
- e
- i
-
- ϕ
- -
- (
- x
- ,
- y
- )
- (
- λ
- 1
- -
- )
- *
- e
- i
-
- ϕ
- +
- (
- x
- ,
- y
- )
- (
- λ
- 2
- +
- )
- *
- e
- i
-
- ϕ
- -
- (
- x
- ,
- y
- )
- (
- λ
- 2
- -
- )
- *
- ]
- [
- λ
- 1
- +
- λ
- 1
- -
- λ
- 2
- +
- λ
- 2
- -
- ]
- -
- 1
- .
123 more elements
Dependencies are inferred from the claim text.