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

被引：155
|
作者：
Sekoguchi, Hiroshi [1 ]
Takahashi, Yasushi [2 ,3 ]
Asano, Takashi [1 ]
Noda, Susumu [1 ,4 ]
机构：
[1] Kyoto Univ, Dept Elect Sci & Engn, Kyoto 6158510, Japan
[2] Osaka Prefecture Univ, Res Org Century 21, Nanosci & Nanotechnol Res Ctr, Sakai, Osaka 5998570, Japan
[3] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan
[4] Kyoto Univ, Photon & Elect Sci & Engn Ctr, Kyoto 6158510, Japan
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 01期
关键词：
HETEROSTRUCTURE NANOCAVITIES; ADSORPTION; SURFACES; DEFECT;
D O I：
10.1364/OE.22.000916
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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. (C) 2014 Optical Society of America
引用
收藏
页码：916 / 924
页数：9
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