Germanium microsphere high-Q resonator

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

doi:10.1364/OL.37.000728

Germanium microsphere high-Q resonator

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

School of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

45 Citations (Scopus)

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 × 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.

Original language	English
Pages (from-to)	728-730
Number of pages	3
Journal	Optics Letters
Volume	37
Issue number	4
DOIs	https://doi.org/10.1364/OL.37.000728
Publication status	Published - 15 Feb 2012

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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 × 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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T1 - Germanium microsphere high-Q resonator

AU - Wang, Pengfei

AU - Lee, Timothy

AU - Ding, Ming

AU - Dhar, Anirban

AU - Hawkins, Thomas

AU - Foy, Paul

AU - Semenova, Yuliya

AU - Wu, Qiang

AU - Sahu, Jayanta

AU - Farrell, Gerald

AU - Ballato, John

AU - Brambilla, Gilberto

PY - 2012/2/15

Y1 - 2012/2/15

N2 - 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 × 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.

AB - 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 × 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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DO - 10.1364/OL.37.000728

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VL - 37

SP - 728

EP - 730

JO - Optics Letters

JF - Optics Letters

IS - 4

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Germanium microsphere high-Q resonator

Abstract

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