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Lattice induced strong coupling and line narrowing of split resonances in metamaterials

Lattice induced strong coupling and line narrowing of split resonances in metamaterials
Lattice induced strong coupling and line narrowing of split resonances in metamaterials
Strongly coupled metamaterial resonances typically undergo mode-splitting by which there is an exchange of energy between matter excitations and photons. Here, we report a strong coupling of the lattice mode with the structural eigen resonances of a split-ring metamaterial associated with mode-splitting and resonance line-narrowing that gives rise to high quality (Q) factor resonances. We demonstrate selective control of the resonance strength, line width and Q-factor of individual split-ring modes by tailoring the coupling of the fundamental lattice mode to each of the split-ring’s hybridized resonances. A three-coupled-oscillator model shows lattice-mediated strong coupling in the form of an anti-crossing behavior between the hybridized metamaterial resonances. Such schemes of strong coupling between the lattice and the split hybrid modes of the metamaterial unit cell offer an avenue to invoke high-Q resonances and strong field confinement which could find applications in designing ultrasensitive sensors, multiband narrow filters, and slow light devices.
metamaterials, lattice resonances, coupled resonances
0003-6951
CaiWei, Thomas Tan
9bffc8f9-a3f6-4195-9e0d-126a1f1f0f2b
Srivastava, Yogesh Kumar
968cc6c3-957e-4712-82fb-846339345036
Manjappa, Manukumara
0034fce0-00e0-4cfe-b01d-988ba3a4d388
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
Singh, Ranjan
895cd3c3-d3d4-4c1f-81f9-f7cbbd13eae8
CaiWei, Thomas Tan
9bffc8f9-a3f6-4195-9e0d-126a1f1f0f2b
Srivastava, Yogesh Kumar
968cc6c3-957e-4712-82fb-846339345036
Manjappa, Manukumara
0034fce0-00e0-4cfe-b01d-988ba3a4d388
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
Singh, Ranjan
895cd3c3-d3d4-4c1f-81f9-f7cbbd13eae8

CaiWei, Thomas Tan, Srivastava, Yogesh Kumar, Manjappa, Manukumara, Plum, Eric and Singh, Ranjan (2018) Lattice induced strong coupling and line narrowing of split resonances in metamaterials. Applied Physics Letters, 112 (20). (doi:10.1063/1.5026649).

Record type: Letter

Abstract

Strongly coupled metamaterial resonances typically undergo mode-splitting by which there is an exchange of energy between matter excitations and photons. Here, we report a strong coupling of the lattice mode with the structural eigen resonances of a split-ring metamaterial associated with mode-splitting and resonance line-narrowing that gives rise to high quality (Q) factor resonances. We demonstrate selective control of the resonance strength, line width and Q-factor of individual split-ring modes by tailoring the coupling of the fundamental lattice mode to each of the split-ring’s hybridized resonances. A three-coupled-oscillator model shows lattice-mediated strong coupling in the form of an anti-crossing behavior between the hybridized metamaterial resonances. Such schemes of strong coupling between the lattice and the split hybrid modes of the metamaterial unit cell offer an avenue to invoke high-Q resonances and strong field confinement which could find applications in designing ultrasensitive sensors, multiband narrow filters, and slow light devices.

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Accepted/In Press date: 30 April 2018
e-pub ahead of print date: 17 May 2018
Keywords: metamaterials, lattice resonances, coupled resonances

Identifiers

Local EPrints ID: 420328
URI: https://eprints.soton.ac.uk/id/eprint/420328
ISSN: 0003-6951
PURE UUID: d3b19491-0109-4e9d-bd9a-994402c2b70d
ORCID for Eric Plum: ORCID iD orcid.org/0000-0002-1552-1840

Catalogue record

Date deposited: 04 May 2018 16:30
Last modified: 14 Mar 2019 01:39

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