2018年第65回応用物理学会春季学術講演会

講演情報

一般セッション(口頭講演)

3 光・フォトニクス » 3.16 Optics and Photonics English Session

[17p-A404-1~14] 3.16 Optics and Photonics English Session

3.11と3.12, 3.11と13.6のコードシェアセッションあり

2018年3月17日(土) 13:15 〜 17:00 A404 (54-404)

丸山 武男(金沢大)、清水 大雅(農工大)

14:45 〜 15:00

[17p-A404-7] Transmission Surface Plasmon Resonance Image Detected by Smartphone Camera

Chutiparn Lertvachirapaiboon1、Akira Baba1、Kazunari Shinbo1、Keizo Kato1 (1.Niigata Univ.)

キーワード:Transmission surface plasmon resonance

Transmission surface plasmon resonance image (TSPRi) using plasmonic grating structure was investigated by the combination with smartphone camera. Since a detected range of smartphone camera was capable of detecting under visible light region, the TSPR substrate that provided a corresponding TSPR excitation wavelength was developed. The TSPR excitation at 650 nm was acquired from gold-coated CYTOP grating substrate. The TSPR excitation was observed entire visible light region up on the light incident angle. At light incident angle of 5o, TSPR excitation wavelengths were observed at 930.6 and 574.1 nm. When the light incident angle was turned to higher angle, two surface plasmon (SP) modes that were SP0 and SP-2 were observed. Although the calculated SP dispersion curves did not perfectly fit with the experimental results, the shifts of TSPR excitation wavelengths were relevant to those calculated SP modes. When the light incident angle was turned to 30o, both SP modes were coupled to single mode resulting in the huge increase of TSPR intensity. The SP coupling effect was confirmed by the shift of TSPR excitation from conventional modes (water (CYTOP)/Au grating substrate) of SP0 and SP-2 modes to SP coupling mode (water/Au grating/CYTOP substrate). The smartphone camera was then used as a detector. The extraordinary transmitted signal at the light incident angle of 30o and at the wavelength of 675 nm that was TSPRi was observed. The transmitted signals detected by smartphone camera corresponded very well with spectroscopic data. This technique could be further developed for portable devices for sensor applications.