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Collective phonon-polaritonic modes in silicon carbide subarrays

Collective phonon-polaritonic modes in silicon carbide subarrays
Collective phonon-polaritonic modes in silicon carbide subarrays
Localized surface phonon polaritons (LSPhPs) can be implemented to engineer light–matter interactions through nanoscale patterning for a range of midinfrared application spaces. However, the polar material systems studied to date have mainly focused on simple designs featuring a single element in the periodic unit cell. Increasing the complexity of the unit cell can serve to modify the resonant near-fields and intra- and inter-unit-cell coupling as well as to dictate spectral tuning in the far-field. In this work, we exploit more complicated unit-cell structures to realize LSPhP modes with additional degrees of design freedom, which are largely unexplored. Collectively excited LSPhP modes with distinctly symmetric and antisymmetric near-fields are supported in these subarray designs, which are based on nanopillars that are scaled by the number of subarray elements to ensure a constant unit-cell size. Moreover, we observe an anomalous mode-matching of the collective symmetric mode in our fabricated subarrays that is robust to changing numbers of pillars within the subarrays as well as to defects intentionally introduced in the form of missing pillars. This work therefore illustrates the hierarchical design of tailored LSPhP resonances and modal near-field profiles simultaneously for a variety of IR applications such as surface-enhanced spectroscopies and biochemical sensing.
1936-0851
Gubbin, Christopher
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De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Lu, Guanyu
c14b34b7-7e94-4a2d-903a-25112b2007f8
Nolen, J. Ryan
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Folland, Thomas
c76f06dc-e9c4-4fb0-9344-ec54e320b7b1
Diaz-Granados, Katja
22d418ea-2b4c-4c9e-9c1e-b6d95762cb05
Kravchenko, Ivan I.
4e9682a5-6a4f-44c0-b35f-fe9204ff12e8
Spencer, Joseph
2c5634af-30dd-4fed-80d9-02a014a639ac
Tadjer, Marko J.
1d88a27e-1e42-4276-b6c3-cbfb95b06439
Glembocki, Orest. J.
6dcd08b7-ad5e-44d8-870b-988d8a1f5cd3
Caldwell, Joshua D.
a1eb4205-8a65-48cb-9e7b-4213d744970e
Gubbin, Christopher
09b75073-7a9a-4443-9a84-1458ec2535e9
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Lu, Guanyu
c14b34b7-7e94-4a2d-903a-25112b2007f8
Nolen, J. Ryan
be8809ea-4046-4523-8099-be2083f87ad1
Folland, Thomas
c76f06dc-e9c4-4fb0-9344-ec54e320b7b1
Diaz-Granados, Katja
22d418ea-2b4c-4c9e-9c1e-b6d95762cb05
Kravchenko, Ivan I.
4e9682a5-6a4f-44c0-b35f-fe9204ff12e8
Spencer, Joseph
2c5634af-30dd-4fed-80d9-02a014a639ac
Tadjer, Marko J.
1d88a27e-1e42-4276-b6c3-cbfb95b06439
Glembocki, Orest. J.
6dcd08b7-ad5e-44d8-870b-988d8a1f5cd3
Caldwell, Joshua D.
a1eb4205-8a65-48cb-9e7b-4213d744970e

Gubbin, Christopher, De Liberato, Simone, Lu, Guanyu, Nolen, J. Ryan, Folland, Thomas, Diaz-Granados, Katja, Kravchenko, Ivan I., Spencer, Joseph, Tadjer, Marko J., Glembocki, Orest. J. and Caldwell, Joshua D. (2021) Collective phonon-polaritonic modes in silicon carbide subarrays. ACS Nano. (doi:10.1021/acsnano.1c08557).

Record type: Article

Abstract

Localized surface phonon polaritons (LSPhPs) can be implemented to engineer light–matter interactions through nanoscale patterning for a range of midinfrared application spaces. However, the polar material systems studied to date have mainly focused on simple designs featuring a single element in the periodic unit cell. Increasing the complexity of the unit cell can serve to modify the resonant near-fields and intra- and inter-unit-cell coupling as well as to dictate spectral tuning in the far-field. In this work, we exploit more complicated unit-cell structures to realize LSPhP modes with additional degrees of design freedom, which are largely unexplored. Collectively excited LSPhP modes with distinctly symmetric and antisymmetric near-fields are supported in these subarray designs, which are based on nanopillars that are scaled by the number of subarray elements to ensure a constant unit-cell size. Moreover, we observe an anomalous mode-matching of the collective symmetric mode in our fabricated subarrays that is robust to changing numbers of pillars within the subarrays as well as to defects intentionally introduced in the form of missing pillars. This work therefore illustrates the hierarchical design of tailored LSPhP resonances and modal near-field profiles simultaneously for a variety of IR applications such as surface-enhanced spectroscopies and biochemical sensing.

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Accepted/In Press date: 22 December 2021
Published date: 27 December 2021

Identifiers

Local EPrints ID: 454269
URI: http://eprints.soton.ac.uk/id/eprint/454269
ISSN: 1936-0851
PURE UUID: 3a5643d0-1dfc-487a-8d58-2f040eab8208
ORCID for Christopher Gubbin: ORCID iD orcid.org/0000-0003-3988-028X
ORCID for Simone De Liberato: ORCID iD orcid.org/0000-0002-4851-2633

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Date deposited: 04 Feb 2022 17:36
Last modified: 17 Mar 2024 07:04

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Contributors

Author: Christopher Gubbin ORCID iD
Author: Guanyu Lu
Author: J. Ryan Nolen
Author: Thomas Folland
Author: Katja Diaz-Granados
Author: Ivan I. Kravchenko
Author: Joseph Spencer
Author: Marko J. Tadjer
Author: Orest. J. Glembocki
Author: Joshua D. Caldwell

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