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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 1 — Jan. 13, 2014
  • pp: 916–924

Photonic crystal nanocavity with a Q-factor of ~9 million

Hiroshi Sekoguchi, Yasushi Takahashi, Takashi Asano, and Susumu Noda  »View Author Affiliations


Optics Express, Vol. 22, Issue 1, pp. 916-924 (2014)
http://dx.doi.org/10.1364/OE.22.000916


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Abstract

We have investigated absorption losses due to surface water adsorbed on the surface of silicon heterostructure nanocavities with quality (Q) factors of several million. Measurements performed while changing the ambient humidity that the nanocavity is exposed to show that the Q value depends linearly on humidity. We also reveal that chemical treatment to change the degree of hydrophilicity of the surface results in a drastic increase of Q; we have obtained an experimental value of 9 million, which represents a new record for a heterostructure nanocavity. We analytically determine the absolute value of absorption loss by exploiting the degree of fluctuation of Q values between different samples.

© 2014 Optical Society of America

OCIS Codes
(010.7340) Atmospheric and oceanic optics : Water
(240.6700) Optics at surfaces : Surfaces
(140.3948) Lasers and laser optics : Microcavity devices
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

History
Original Manuscript: November 7, 2013
Manuscript Accepted: December 22, 2013
Published: January 8, 2014

Citation
Hiroshi Sekoguchi, Yasushi Takahashi, Takashi Asano, and Susumu Noda, "Photonic crystal nanocavity with a Q-factor of ~9 million," Opt. Express 22, 916-924 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-1-916


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