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Germanium microsphere high-Q resonator

Germanium microsphere high-Q resonator
Germanium microsphere high-Q resonator
In this Letter, the fabrication and characterization of a microsphere resonator from the semiconductor germanium is demonstrated. Whispering gallery modes are excited in a 46 µm diameter germanium microsphere resonator using evanescent coupling from a tapered silica optical fiber with a waist diameter of 2 µm. Resonances with Q factors as high as 3.8 x 104 at wavelengths near 2 µm are observed. Because of their ultrahigh optical nonlinearities and extremely broad transparency window, germanium microsphere resonators offer the potential for optical processing devices, in particular at long wavelengths, such as around 2 µm.
0146-9592
728-730
Wang, Pengfei
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Lee, Timothy
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Ding, Ming
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Dhar, Anirban
e9c2056f-ac65-4635-a1ff-7e0f1314bc28
Hawkins, Thomas
718ea907-5eb4-47b2-9c48-d56a788453c4
Foy, Paul
863d96b0-5edc-4bc0-9456-8ab009f5940d
Semenova, Yuliya
6e64157c-40b6-4eb5-938c-ae2dd348f652
Wu, Qiang
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Sahu, Jayanta
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Farrell, Gerald
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Ballato, John
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Brambilla, Gilberto
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Wang, Pengfei
a1ba240f-d4f0-4150-bcd8-cb418e841dcb
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Ding, Ming
086b25a3-e5c3-4501-a90d-43d734e19344
Dhar, Anirban
e9c2056f-ac65-4635-a1ff-7e0f1314bc28
Hawkins, Thomas
718ea907-5eb4-47b2-9c48-d56a788453c4
Foy, Paul
863d96b0-5edc-4bc0-9456-8ab009f5940d
Semenova, Yuliya
6e64157c-40b6-4eb5-938c-ae2dd348f652
Wu, Qiang
fad3844e-9eba-496c-876d-3bbc9ee4a689
Sahu, Jayanta
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Farrell, Gerald
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Ballato, John
a93092f5-bd5f-4126-ada9-142b93308ae5
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8

Wang, Pengfei, Lee, Timothy, Ding, Ming, Dhar, Anirban, Hawkins, Thomas, Foy, Paul, Semenova, Yuliya, Wu, Qiang, Sahu, Jayanta, Farrell, Gerald, Ballato, John and Brambilla, Gilberto (2012) Germanium microsphere high-Q resonator. Optics Letters, 37 (4), 728-730. (doi:10.1364/OL.37.000728).

Record type: Article

Abstract

In this Letter, the fabrication and characterization of a microsphere resonator from the semiconductor germanium is demonstrated. Whispering gallery modes are excited in a 46 µm diameter germanium microsphere resonator using evanescent coupling from a tapered silica optical fiber with a waist diameter of 2 µm. Resonances with Q factors as high as 3.8 x 104 at wavelengths near 2 µm are observed. Because of their ultrahigh optical nonlinearities and extremely broad transparency window, germanium microsphere resonators offer the potential for optical processing devices, in particular at long wavelengths, such as around 2 µm.

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More information

Published date: 2012
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 333954
URI: http://eprints.soton.ac.uk/id/eprint/333954
ISSN: 0146-9592
PURE UUID: c2be9901-583f-4755-9911-c3bbf619c086
ORCID for Timothy Lee: ORCID iD orcid.org/0000-0001-9665-5578
ORCID for Jayanta Sahu: ORCID iD orcid.org/0000-0003-3560-6152
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

Catalogue record

Date deposited: 06 Mar 2012 14:07
Last modified: 15 Mar 2024 03:09

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Contributors

Author: Pengfei Wang
Author: Timothy Lee ORCID iD
Author: Ming Ding
Author: Anirban Dhar
Author: Thomas Hawkins
Author: Paul Foy
Author: Yuliya Semenova
Author: Qiang Wu
Author: Jayanta Sahu ORCID iD
Author: Gerald Farrell
Author: John Ballato

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