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Coherent excitation-selective spectroscopy of multipole resonances

Coherent excitation-selective spectroscopy of multipole resonances
Coherent excitation-selective spectroscopy of multipole resonances
Thin films of functional materials, from graphene to semiconductor heterostructures, and from nanomembranes to Langmuir-Blodgett films play key roles in modern technologies. For such films optical interrogation is the main and often the only practical method of characterization. Here, we show that characterization of the optical response of thin films can be greatly improved with a type of coherent spectroscopy using two counterpropagating beams of light. The spectroscopy is selective to particular types of multipole resonances that form the absorption spectrum of the film, and therefore can reveal lines that are hidden in conventional absorption spectroscopy. We explicitly demonstrate selectivity of this spectroscopy in a series of proof-of-principle experiments with plasmonic metamaterial arrays designed to exhibit different multipole resonances. We further demonstrate the analytic potential of this spectroscopy by extracting the hidden resonance from the spectrum of a complex nanostructure.
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Tseng, Ming Lun
cc9bb809-91ca-4648-bb5a-04c1b84d3c22
Tsai, Din Ping
29dbf01e-c22a-45a5-95b3-839a185d1779
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Tseng, Ming Lun
cc9bb809-91ca-4648-bb5a-04c1b84d3c22
Tsai, Din Ping
29dbf01e-c22a-45a5-95b3-839a185d1779
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6

Fang, Xu, Tseng, Ming Lun, Tsai, Din Ping and Zheludev, Nikolai (2016) Coherent excitation-selective spectroscopy of multipole resonances. Physical Review Applied, 5 (1), [014010]. (doi:10.1103/PhysRevApplied.5.014010).

Record type: Article

Abstract

Thin films of functional materials, from graphene to semiconductor heterostructures, and from nanomembranes to Langmuir-Blodgett films play key roles in modern technologies. For such films optical interrogation is the main and often the only practical method of characterization. Here, we show that characterization of the optical response of thin films can be greatly improved with a type of coherent spectroscopy using two counterpropagating beams of light. The spectroscopy is selective to particular types of multipole resonances that form the absorption spectrum of the film, and therefore can reveal lines that are hidden in conventional absorption spectroscopy. We explicitly demonstrate selectivity of this spectroscopy in a series of proof-of-principle experiments with plasmonic metamaterial arrays designed to exhibit different multipole resonances. We further demonstrate the analytic potential of this spectroscopy by extracting the hidden resonance from the spectrum of a complex nanostructure.

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Accepted/In Press date: 3 December 2015
e-pub ahead of print date: 27 January 2016
Published date: January 2016
Organisations: Optoelectronics Research Centre

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Local EPrints ID: 384846
URI: http://eprints.soton.ac.uk/id/eprint/384846
PURE UUID: e43e83b2-901c-4e5d-a0ef-f0495eef1b26
ORCID for Xu Fang: ORCID iD orcid.org/0000-0003-1735-2654
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 11 Jan 2016 12:55
Last modified: 15 Mar 2024 03:43

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Contributors

Author: Xu Fang ORCID iD
Author: Ming Lun Tseng
Author: Din Ping Tsai
Author: Nikolai Zheludev ORCID iD

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