Meta-structure and tunable optical device including the same
AssigneesSamsung Electronics Co., Ltd., California Institute of Technology
InventorsSeunghoon Han, Georgia Theano Papadakis, Harry Atwater
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Abstract
A meta-structure and a tunable optical device including the same are provided. The meta-structure includes a plurality of metal layers spaced apart from one another, an active layer spaced apart from the plurality of metal layers and having a carrier concentration that is tuned according to an electric signal applied to the active layer and the plurality of metal layers, and a plurality of dielectric layers spaced apart from one another and each having one surface contacting a metal layer among the plurality of metal layers and another surface contacting the active layer.
Claims20
A meta-structure comprising:
- a plurality of metal layers spaced apart from one another;
- an active layer spaced apart from the plurality of metal layers and having a carrier concentration that is tuned according to an electric signal applied to the active layer and the plurality of metal layers;
- and
- a plurality of dielectric layers spaced apart from one another and each having one surface contacting a metal layer among the plurality of metal layers and another surface contacting the active layer.
A tunable optical device comprising:
- a meta-structure comprising:
- a plurality of metal layers spaced apart from one another;
- an active layer spaced apart from the plurality of metal layers and having a carrier concentration that is tuned according to an electric signal applied to the active layer and the plurality of metal layers;
- and
- a plurality of dielectric layers spaced apart from one another and each having one surface contacting a metal layer among the plurality of metal layers and another surface contacting the active layer,
- a voltage-applying portion configured to apply a voltage between the active layer and the plurality of metal layers to generate the electric signal;
- and
- a controller configured to control the voltage to be applied between the active layer and the plurality of metal layers by the voltage-applying portion according to an optical property to be controlled in the meta-structure.
A display apparatus comprising:
- a first substrate comprising a first polarization plate;
- a second substrate comprising a second polarization plate;
- an optical modulator provided between the first substrate and the second substrate and comprising a plurality of meta-structures, each of the meta-structures comprising:
- a plurality of metal layers spaced apart from one another;
- an active layer spaced apart from the plurality of metal layers and having a carrier concentration that is tuned according to an electric signal applied to the active layer and the plurality of metal layers;
- and
- a plurality of dielectric layers spaced apart from one another and each having one surface contacting a metal layer among the plurality of metal layers and another surface contacting the active layer;
- and
- a circuit board comprising a circuit element configured to apply a voltage to each of the plurality of meta-structures to generate the electrical signal.
An optical memory device comprising:
- a meta-structure comprising:
- a plurality of metal layers spaced apart from one another;
- an active layer spaced apart from the plurality of metal layers and having a carrier concentration that is tuned according to an electric signal applied to the active layer and the plurality of metal layers;
- and
- a plurality of dielectric layers spaced apart from one another and each having one surface contacting a metal layer among the plurality of metal layers and another surface contacting the active layer;
- a first quantum emitter and a second quantum emitter, the first and second quantum emitters provided adjacent to the meta-structure and configured to exchange optical energy with each other;
- and
- a controller configured to apply a voltage for controlling an optical band gap of the meta-structure to the meta-structure.
Dependencies are inferred from the claim text.