Optical devices enabled by vertical dielectric Mie resonators

Patent metadata

Field	Value
Publication number	US-2020249451-A1
Application number	US-201916369218-A
Country	US
Kind code	A1
Filing date	Mar 29, 2019
Priority date	Feb 6, 2019
Publication date	Aug 6, 2020
Grant date	—

Abstract

Dielectric resonators provide a building block for the development of low-loss resonant metamaterials because they replace lossy ohmic currents of metallic resonators with low-loss displacement currents. The spectral locations of electric and magnetic dipole resonances of a dielectric resonator can be tuned by varying the resonator geometry so that desired scattering properties are achieved.

First claim

We claim:

1 . An optical device, comprising:
a periodic lattice of unit cells in a low-index substrate, each unit cell comprising a hollow cavity etched into the substrate wherein each cavity comprises one or more non-planar, high-index dielectric resonators deposited on at least one wall of the hollow cavity.

2 . The optical device of claim 1 , wherein the one or more non-planar, high-index dielectric resonators has an index of refraction greater than 3.

3 . The optical device of claim 1 , wherein the one or more non-planar, high-index dielectric resonator comprises germanium, silicon, chalcogenide, or a chalcogenide alloy.

4 . The optical device of claim 1 , wherein the one or more non-planar, high-index dielectric resonators have an elliptical or rectangular geometry.

5 . The optical device of claim 4 , wherein the major radius and minor radius of the elliptical or rectangular geometry are selected to provide Huygens' resonators.

6 . The optical device of claim 1 , where the one or more non-planar, high-index dielectric resonators comprises two resonators deposited on opposite walls of a unit cell, thereby providing back-to-back vertical resonators in the periodic lattice.

7 . The optical device of claim 1 , wherein the one or more non-planar, high-index dielectric resonators comprise two or more vertically stacked resonators.

8 . The optical device of claim 1 , wherein the hollow cavities are etched through the low-index substrate, thereby providing a honeycomb structure of through-hole unit cells in a thin membrane.

9 . The optical device of claim 1 , further comprising at least one additional periodic lattice of unit cells repeated in a layer-by-layer fashion to provide a three-dimensional volumetric array.

10 . The optical device of claim 1 , wherein the low-index substrate has an index of refraction less than 1.5.

11 . The optical device of claim 1 , wherein the low-index substrate comprises silicon dioxide, silicon carbide, silicon nitride, aluminum oxide, or aluminum nitride.

12 . The optical device of claim 1 , wherein the unit cells are subwavelength to an incident infrared light.

Assignees

• Nat Tech & Eng Solutions Sandia Llc

Inventors

• Campione Salvatore
• Sinclair Michael B
• Brener Igal
• Burckel D Bruce
• Pung Aaron J
• Goldflam Michael D

Classifications

• G06K7/10 Primary

  by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation · CPC title

• G02B17/004 Primary

  Systems comprising a plurality of reflections between two or more surfaces, e.g. cells, resonators (multipass arrangements for optical cuvettes G01N21/031; laser resonators H01S3/05) · CPC title

• G02B5/284

  of etalon type comprising a resonant cavity other than a thin solid film, e.g. gas, air, solid plates (etalons for fibre optic multiplexing G02B6/29358; etalons for spectral measurement G01J3/26) · CPC title

• G02B1/002 Primary

  made of materials engineered to provide properties not available in nature, e.g. metamaterials · CPC title

• G03F7/7015

  Details of optical elements · CPC title