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Demonstration of chalcogenide glass racetrack microresonators.

Authors
  • Hu, Juejun1
  • Carlie, Nathan
  • Petit, Laeticia
  • Agarwal, Anu
  • Richardson, Kathleen
  • Kimerling, Lionel
  • 1 Microphotonics Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. [email protected]
Type
Published Article
Journal
Optics letters
Publication Date
Apr 15, 2008
Volume
33
Issue
8
Pages
761–763
Identifiers
PMID: 18414524
Source
Medline
License
Unknown

Abstract

We have demonstrated what we believe to be the first chalcogenide glass racetrack microresonator using a complementary metal-oxide semiconductor-compatible lift-off technique with thermally evaporated As(2)S(3) films. The device simultaneously features a small footprint of 0.012 mm x 0.012 mm, a cavity Q (quality factor) of 10,000, and an extinction ratio of 32 dB. These resonators exhibit a very high sensitivity to refractive index changes with a demonstrated detection capability of Dn(As(2)S(3)=(4.5 x 10(-6)+/-10%) refractive index unit. The resonators were applied to derive a photorefractive response of As(2)S(3) to lambda=550 nm light. The resonator devices are a versatile platform for both sensing and glass material property investigation.

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