Journal
OPTICS LETTERS
Volume 36, Issue 1, Pages 91-93Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.000091
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Funding
- CREST of the Japan Science and Technology Agency (JST)
- Japan Society for the Promotion of Science (JSPS)
- World Class University [R32-2008-000-10204-0]
- OPERA of the National Research Foundation of Korea (NRF) [R11-2003-022]
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We design and fabricate ultra-high-quality (Q) photonic nanocavities in a symmetrically glass-clad silicon (Si) two-dimensional (2D) photonic crystal (PhC) structure. We theoretically investigate the dependence of the refractive index of the glass on the Q factors for asymmetric and symmetric structures. We show that the index-symmetric distribution of the glass is a critical factor to realize ultrahigh Q factors for glass-clad 2D PhC structures. We fabricate symmetrically glass-clad Si PhC nanocavities and achieve a record Q factor of 1 x 10(6), comparable with the highest Q factors of nanocavities in air-bridge structures. (C) 2010 Optical Society of America
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