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Efficient light confinement with nanostructured optical microfiber tips

Efficient light confinement with nanostructured optical microfiber tips
Efficient light confinement with nanostructured optical microfiber tips
Nanostructured optical microfiber tips are proposed and experimentally demonstrated to efficiently confine light beyond the diffraction limit at high powers. Focused ion beam milling was used for the nanostructuring of gold-coated optical microfiber tips with both single-ramp and wedge geometries. Small apertures were formed by flat cutting or hole drilling and optical spot sizes of ~λ/10 with high transmission efficiency were achieved. Numerical simulations were carried out to optimize the device design with circularly polarized light. Enhanced transmission efficiencies (higher than 10-2) were recorded by optimizing the overall light throughput along the fiber tips. The tip thermal behavior was investigated by launching high powers into the device and recording the tip position in a scanning near-field optical microscopy set-up. This nanostructured optical microfiber tip has the potential for applications in optical recording, scanning near-field optical microscopy and lithography.
0030-4018
4688-4697
Ding, Ming
086b25a3-e5c3-4501-a90d-43d734e19344
Fenwick, Oliver
67ef1b55-9cae-4f93-a0c8-34b25849f635
Di Stasio, Francesco
f2819424-0689-4487-b9b6-09ca82213749
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Sessions, Neil
ee737092-56b4-403e-a2f9-764e07e42625
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Cacialli, Franco
e82df3a6-6c53-4436-9449-7e3209f0519e
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Ding, Ming
086b25a3-e5c3-4501-a90d-43d734e19344
Fenwick, Oliver
67ef1b55-9cae-4f93-a0c8-34b25849f635
Di Stasio, Francesco
f2819424-0689-4487-b9b6-09ca82213749
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Sessions, Neil
ee737092-56b4-403e-a2f9-764e07e42625
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Cacialli, Franco
e82df3a6-6c53-4436-9449-7e3209f0519e
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Ding, Ming, Fenwick, Oliver, Di Stasio, Francesco, Ou, Jun-Yu, Sessions, Neil, Jung, Yongmin, Cacialli, Franco and Brambilla, Gilberto (2012) Efficient light confinement with nanostructured optical microfiber tips. Optics Communications, 285 (23), 4688-4697. (doi:10.1016/j.optcom.2012.05.006).

Record type: Article

Abstract

Nanostructured optical microfiber tips are proposed and experimentally demonstrated to efficiently confine light beyond the diffraction limit at high powers. Focused ion beam milling was used for the nanostructuring of gold-coated optical microfiber tips with both single-ramp and wedge geometries. Small apertures were formed by flat cutting or hole drilling and optical spot sizes of ~λ/10 with high transmission efficiency were achieved. Numerical simulations were carried out to optimize the device design with circularly polarized light. Enhanced transmission efficiencies (higher than 10-2) were recorded by optimizing the overall light throughput along the fiber tips. The tip thermal behavior was investigated by launching high powers into the device and recording the tip position in a scanning near-field optical microscopy set-up. This nanostructured optical microfiber tip has the potential for applications in optical recording, scanning near-field optical microscopy and lithography.

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Published date: October 2012
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 343744
URI: http://eprints.soton.ac.uk/id/eprint/343744
ISSN: 0030-4018
PURE UUID: dca13bbf-144e-4460-af65-f57bacf920c8
ORCID for Jun-Yu Ou: ORCID iD orcid.org/0000-0001-8028-6130
ORCID for Yongmin Jung: ORCID iD orcid.org/0000-0002-9054-4372
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

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Date deposited: 09 Oct 2012 15:43
Last modified: 02 Apr 2022 01:38

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Contributors

Author: Ming Ding
Author: Oliver Fenwick
Author: Francesco Di Stasio
Author: Jun-Yu Ou ORCID iD
Author: Neil Sessions
Author: Yongmin Jung ORCID iD
Author: Franco Cacialli

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