論文

査読有り
2014年4月

Air-band optical resonators in one-dimensional Si photonic crystal waveguides for biosensing applications

JAPANESE JOURNAL OF APPLIED PHYSICS
  • Kakuro Hirai
  • ,
  • Takahiro Araki
  • ,
  • Jingnan Cai
  • ,
  • Katsuyoshi Hayashi
  • ,
  • Tsutomu Horiuchi
  • ,
  • Yuzuru Iwasaki
  • ,
  • Yuko Ueno
  • ,
  • Emi Tamechika
  • ,
  • Kazumi Wada
  • ,
  • Yasuhiko Ishikawa

53
4
開始ページ
04EG09
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.7567/JJAP.53.04EG09
出版者・発行元
IOP PUBLISHING LTD

Optical cavities using air-band states in Si photonic crystals (PhCs) are proposed as biosensors. Since the light in the air band of PhCs is preferably located at the lower-index cladding rather than the inside of higher-index Si, interactions are enhanced between the light and the target molecules in the cladding, being effective for the sensitive detections. Such an air-band PhC is used as an optical cavity, which is surrounded with another PhC as the photonic-bandgap mirrors. Simulations are performed for air-band resonators in one-dimensional (1D) PhC of arrayed holes in a Si channel waveguide, in order to analyze a figure of sensing, i.e., red shifts in the resonance wavelengths induced by the presence of target molecules. The S value, the amount of red shift caused by the unit change in the cladding index, can be as large as 200 nm/RIU, which is 2 times larger than those for ordinary 1D-PhC resonators. Fabricated devices successfully show the resonance peaks, whose wavelengths and quality factors agree well with theoretical ones. These results suggest that the air-band resonators are promising for high-performance biosensors. (C) 2014 The Japan Society of Applied Physics

Web of Science ® 被引用回数 : 6

リンク情報
DOI
https://doi.org/10.7567/JJAP.53.04EG09
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000338185100097&DestApp=WOS_CPL
URL
http://stacks.iop.org/1347-4065/53/i=4S/a=04EG09
URL
http://orcid.org/0000-0001-6462-1453

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