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All-fiber plasmonic platform based on hybrid composite metal/glass microwires

All-fiber plasmonic platform based on hybrid composite metal/glass microwires
All-fiber plasmonic platform based on hybrid composite metal/glass microwires
Metal tips are emerging plasmonic structures that can offer high field intensity at the tip apex and high confinement in the nanoscale. The fabrication though of smooth metal tips with well-defined geometrical characteristics, crucial for optimizing the performance of the plasmonic structure, is not trivial.
Furthermore pure metal tips are exposed to the environment and fragile, thus, complicating their use in real applications. The proposed platform based on hybrid composite glass metal microwires can offer the required robustness for device development. An optimized fabrication process of high quality all-fiber
plasmonic tips by tapering such hybrid metal core/dielectric cladding microfibers is proposed and demonstrated experimentally. The presence of the dielectric cladding offers continuous re-excitation of the plasmon modes due to repeated total internal reflection at the glass/air interface which can dramatically
reduce the high losses induced by the metal core. This enables direct light coupling from the distal end of fiber instead of side excitation of the tip, allowing thus their integration in optical fiber and planar circuits.
Plasmonic tips were successfully demonstrated in a highly controllable manner and their performance was related to simulation results predicting high field enhancement factors up to 105.
1932-7447
26169-26176
Petropoulou, Afroditi
2ba184f2-6b3b-4eb0-b752-9a1c6b8ce691
Antonopoulos, Grigoris
b3bbaeb7-7175-46a5-b345-61aaf16e5f63
Bastock, Paul J.
73583809-d787-4eb4-8b93-2110c5e2f29e
Kakarantzas, George
3a1b0f3c-aa64-4c79-8529-58c063a3ef76
Craig, Christopher
2328b42b-552e-4a82-941d-45449e952f10
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Zervas, Michael
1840a474-dd50-4a55-ab74-6f086aa3f701
Riziotis, Christos
e50a77dd-3c20-42a7-99d1-84f708fed476
Petropoulou, Afroditi
2ba184f2-6b3b-4eb0-b752-9a1c6b8ce691
Antonopoulos, Grigoris
b3bbaeb7-7175-46a5-b345-61aaf16e5f63
Bastock, Paul J.
73583809-d787-4eb4-8b93-2110c5e2f29e
Kakarantzas, George
3a1b0f3c-aa64-4c79-8529-58c063a3ef76
Craig, Christopher
2328b42b-552e-4a82-941d-45449e952f10
Hewak, Daniel
87c80070-c101-4f7a-914f-4cc3131e3db0
Zervas, Michael
1840a474-dd50-4a55-ab74-6f086aa3f701
Riziotis, Christos
e50a77dd-3c20-42a7-99d1-84f708fed476

Petropoulou, Afroditi, Antonopoulos, Grigoris, Bastock, Paul J., Kakarantzas, George, Craig, Christopher, Hewak, Daniel, Zervas, Michael and Riziotis, Christos (2018) All-fiber plasmonic platform based on hybrid composite metal/glass microwires. The Journal of Physical Chemistry C, 122 (45), 26169-26176. (doi:10.1021/acs.jpcc.8b08844).

Record type: Article

Abstract

Metal tips are emerging plasmonic structures that can offer high field intensity at the tip apex and high confinement in the nanoscale. The fabrication though of smooth metal tips with well-defined geometrical characteristics, crucial for optimizing the performance of the plasmonic structure, is not trivial.
Furthermore pure metal tips are exposed to the environment and fragile, thus, complicating their use in real applications. The proposed platform based on hybrid composite glass metal microwires can offer the required robustness for device development. An optimized fabrication process of high quality all-fiber
plasmonic tips by tapering such hybrid metal core/dielectric cladding microfibers is proposed and demonstrated experimentally. The presence of the dielectric cladding offers continuous re-excitation of the plasmon modes due to repeated total internal reflection at the glass/air interface which can dramatically
reduce the high losses induced by the metal core. This enables direct light coupling from the distal end of fiber instead of side excitation of the tip, allowing thus their integration in optical fiber and planar circuits.
Plasmonic tips were successfully demonstrated in a highly controllable manner and their performance was related to simulation results predicting high field enhancement factors up to 105.

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acs.jpcc.8b08844 - Accepted Manuscript
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e-pub ahead of print date: 19 October 2018
Published date: 15 November 2018

Identifiers

Local EPrints ID: 425542
URI: http://eprints.soton.ac.uk/id/eprint/425542
ISSN: 1932-7447
PURE UUID: 62988f32-14ab-4d76-8e9b-86c8895bc26a
ORCID for Christopher Craig: ORCID iD orcid.org/0000-0001-6919-4294
ORCID for Daniel Hewak: ORCID iD orcid.org/0000-0002-2093-5773
ORCID for Michael Zervas: ORCID iD orcid.org/0000-0002-0651-4059

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Date deposited: 24 Oct 2018 16:30
Last modified: 15 Sep 2021 04:57

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Contributors

Author: Afroditi Petropoulou
Author: Grigoris Antonopoulos
Author: Paul J. Bastock
Author: George Kakarantzas
Author: Daniel Hewak ORCID iD
Author: Michael Zervas ORCID iD
Author: Christos Riziotis

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