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Anisotropy and modal hybridization in infrared nanophotonics using low-symmetry materials

Anisotropy and modal hybridization in infrared nanophotonics using low-symmetry materials
Anisotropy and modal hybridization in infrared nanophotonics using low-symmetry materials
Anisotropy has been a key property employed in the design of optical components for hundreds of years. However, in recent years there has been growing interest in polaritons supported within anisotropic (low crystal symmetry) materials for their ability to compress light to smaller, deeply subwavelength dimensions. While historically the first anisotropic polaritons probed were hyperbolic modes, research into anisotropic materials has recently turned toward hybrid materials and optical modes, employing phenomena such as phonon confinement, polaritonic strong coupling, and Moiré structures to design the optical properties. In this Perspective, we will briefly introduce the physics and theories of polariton anisotropy, review recently investigated anisotropic and two-dimensional materials, and then move on to a discussion of approaches toward realizing hybrid modes and identifying new materials. Based on the results from the past few years, we extend these discussions to highlight outstanding challenges and outline what we perceive as promising paths to further explore the potential for polariton anisotropy and hybrid systems in future nanophotonic optical devices.
anisotropy, hyperbolic, polaritons
2330-4022
1078–1095
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
He, Mingze
1d57b60d-0098-499f-bb7a-b8a0c57bf0c8
Folland, Thomas G.
c76f06dc-e9c4-4fb0-9344-ec54e320b7b1
Duan, Jiahua
bacb7063-2ff9-46d1-b48a-34697f55ed6e
Alonso-González, Pablo
fa014f40-b3bc-4e76-8f0c-3806a354e0db
Paarmann, Alexander
9699aa61-532e-4947-80ea-278f81be011a
Caldwell, Joshua D.
a1eb4205-8a65-48cb-9e7b-4213d744970e
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
He, Mingze
1d57b60d-0098-499f-bb7a-b8a0c57bf0c8
Folland, Thomas G.
c76f06dc-e9c4-4fb0-9344-ec54e320b7b1
Duan, Jiahua
bacb7063-2ff9-46d1-b48a-34697f55ed6e
Alonso-González, Pablo
fa014f40-b3bc-4e76-8f0c-3806a354e0db
Paarmann, Alexander
9699aa61-532e-4947-80ea-278f81be011a
Caldwell, Joshua D.
a1eb4205-8a65-48cb-9e7b-4213d744970e

De Liberato, Simone, He, Mingze, Folland, Thomas G., Duan, Jiahua, Alonso-González, Pablo, Paarmann, Alexander and Caldwell, Joshua D. (2022) Anisotropy and modal hybridization in infrared nanophotonics using low-symmetry materials. ACS Photonics, 9 (4), 1078–1095. (doi:10.1021/acsphotonics.1c01486).

Record type: Review

Abstract

Anisotropy has been a key property employed in the design of optical components for hundreds of years. However, in recent years there has been growing interest in polaritons supported within anisotropic (low crystal symmetry) materials for their ability to compress light to smaller, deeply subwavelength dimensions. While historically the first anisotropic polaritons probed were hyperbolic modes, research into anisotropic materials has recently turned toward hybrid materials and optical modes, employing phenomena such as phonon confinement, polaritonic strong coupling, and Moiré structures to design the optical properties. In this Perspective, we will briefly introduce the physics and theories of polariton anisotropy, review recently investigated anisotropic and two-dimensional materials, and then move on to a discussion of approaches toward realizing hybrid modes and identifying new materials. Based on the results from the past few years, we extend these discussions to highlight outstanding challenges and outline what we perceive as promising paths to further explore the potential for polariton anisotropy and hybrid systems in future nanophotonic optical devices.

Text
Perspectives-AnisoPolaritons R4 v1 - Accepted Manuscript
Restricted to Repository staff only until 9 March 2023.
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Accepted/In Press date: 25 February 2022
e-pub ahead of print date: 9 March 2022
Published date: 20 April 2022
Additional Information: Funding Information: M.H. and J.D.C. acknowledge support through the Army Research Office (Grant #W911NF-21-1-0119) and the National Science Foundation (Grant #1904793), respectively. T.G.F. acknowledges support through the University of Iowa Startup funds and The Old Gold Fellowship. P.A.-G. and J.D. acknowledge support from the European Research Council under Starting Grant No. 715496, 2DNANOPTICA, and the Spanish Ministry of Science and Innovation (State Plan for Scientific and Technical Research and Innovation Grant Number PID2019-111156GB-I00). S.D.L. acknowledges support by a Royal Society Research fellowship, the Philip Leverhulme prize, and a Research Grant of the Leverhulme Trust (Grant No. RPG-2019-174). Funding Information: (1) Army Research Office (Grant #W911NF-21-1-0119); (2) National Science Foundation (Grant #1904793); (3) University of Iowa Startup funds; (4) The Old Gold Fellowship; (5) The European Research Council under Starting Grant No. 715496; (6) 2DNANOPTICA; (7) Spanish Ministry of Science and Innovation (State Plan for Scientific and Technical Research and Innovation Grant Number PID2019-111156GB-I00); (8) Royal Society Research fellowship; (9) Philip Leverhulme prize; (10) Research Grant of the Leverhulme Trust (Grant No. RPG-2019-174). Publisher Copyright: © 2022 American Chemical Society. All rights reserved.
Keywords: anisotropy, hyperbolic, polaritons

Identifiers

Local EPrints ID: 456838
URI: http://eprints.soton.ac.uk/id/eprint/456838
ISSN: 2330-4022
PURE UUID: d5af17c6-f992-462c-a4f8-c873d8a480f9
ORCID for Simone De Liberato: ORCID iD orcid.org/0000-0002-4851-2633

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Date deposited: 12 May 2022 16:48
Last modified: 23 Jun 2022 01:46

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Contributors

Author: Mingze He
Author: Thomas G. Folland
Author: Jiahua Duan
Author: Pablo Alonso-González
Author: Alexander Paarmann
Author: Joshua D. Caldwell

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