論文

2019年

CURRENT DETECTION TYPE SPR SENSOR USING AU GRATING AND BACKSIDE ILLUMINATION

2019 IEEE 32ND INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS (MEMS)
  • Yoshiki Saito
  • ,
  • Yosuke Yamamoto
  • ,
  • Tetsuo Kan
  • ,
  • Takuya Tsukagoshi
  • ,
  • Kentaro Noda
  • ,
  • Isao Shimoyama

開始ページ
452
終了ページ
455
記述言語
英語
掲載種別
研究論文(国際会議プロシーディングス)
出版者・発行元
IEEE

In this paper, we report on miniaturization of chemical sensor using Surface Plasmon Resonance (SPR). This sensor has an Au grating on a surface of an n-Si wafer. The Au grating enables excitation SPR that can be detected electrically with the device. We demonstrated a backside illumination method to excite SPR so that the excitation light was introduced from the n-Si side, instead of the Au side. The excitation light from the backside can reach the Au grating without traveling through the sample liquid so that the unwanted attenuation of the illumination light by the sample can be avoided. The excitation light is diffracted by the grating, and the diffracted light couples to free electrons on the gold surface as SPR. Since SPR excites free electrons on the Au, they are detected as photocurrent at the Schottky junction at the Au/n-Si interface. In this study, we compared the current responses by the backside illumination method with changing the refractive index of sample using air and pure water. Depending on the change of the sample, peaks appeared at different angles in the currents response curve. We verified that the proposing[GRAPHICS]device can discriminate sample species on the Au, and can perform as an SPR sensor.


リンク情報
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000541142100126&DestApp=WOS_CPL

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