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ID 113453
著者
Kusaba, Keita Tokushima University
キーワード
Refractive index sensor
subwavelength grating
waveguide
資料タイプ
学術雑誌論文
抄録
A highly sensitive refractive index sensor with normally incident optical geometry was experimentally demonstrated using dual resonance in a subwavelength grating (SWG) on a waveguide. Two eignemodes within the SWG and waveguide were utilized for refractive index sensing with the reduction of noise such as background noise. The finite-difference time-domain numerical method was used to estimate the refractive index sensing performance of our sensor. The calculated electric field clarified that the incident light could excite modes in the SWG and waveguide with normally incident optical geometry, and the modes formed two resonance reflection peaks. The calculation showed that these dual resonance peaks depended differently on the refractive index of the ambient around the sensor, and the intensity difference between both resonance peaks varied with the slight change in refractive index of the ambient. The sensor was fabricated using traditional electron-beam lithography techniques, and two reflection resonant peaks were experimentally obtained. The difference between the dual resonance peak intensities varied significantly with the minuscule change in refractive index of the ambient around the sensor, and the resolution of the refractive index reached 7.65 × 10–4, assuming a spectrometer intensity sensitivity of 1%.
掲載誌名
IEEE Sensors Journal
ISSN
1530437X
15581748
cat書誌ID
AA11551238
出版者
IEEE
19
15
開始ページ
6147
終了ページ
6153
発行日
2019-04-11
備考
論文本文は2021-04-11以降公開予定
権利情報
© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
EDB ID
出版社版DOI
出版社版URL
言語
eng
著者版フラグ
その他
部局
理工学系