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Germanium microsphere high-Q resonator

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), pp. 728-730. (doi:10.1364/OL.37.000728).

Record type: Article


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 10^4 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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Published date: 2012
Organisations: Optoelectronics Research Centre


Local EPrints ID: 333954
ISSN: 0146-9592
PURE UUID: c2be9901-583f-4755-9911-c3bbf619c086

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Date deposited: 06 Mar 2012 14:07
Last modified: 18 Jul 2017 06:12

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

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