[20p-W351-1~15] 12.3 Functional Materials and Novel Devices

[20p-W351-2] In-situ Microspecroscopic Imaging for Photoisomerization and Crystallization of Diarylethene Film on Aluminium Chip With Upright-Inverted Microscope

〇Taiga Kadoyama¹, Ryo Nishimura², Mana Toma¹, Kingo Uchida², Keiko Tawa¹ (1.Kwansei Gakuin Univ., 2.Ryukoku Univ.)

Keywords:Photoisomerization,Microscope,Plasmon

Diarylethene is one of the representative photochromic molecules and an open-ring isomer (1o) converts to a closed-ring isomer (1c) upon irradiation with UV light. 1c reverts to 1o by irradiation with visible light. Plasmonic chip has metal - coated periodic structure, and it can provide enhanced electric field by coupling an incident light with surface plasmon polaritons. In this study, diarylethene film is prepared on the plasmonic chip. As a plasmonic chip, aluminium chip was used because the enhanced electric field is available in the wavelength regionof UV light. Under the upright-inverted microscope, epi-illumination light, transmitted light and plasmonic field were used for local photoisomerization, and microspectroscopic image and bright field image were simultaneously observed. We report the microscopic isomerization and macroscopic crystallization processes of diarylethene films on plasmonic chip under the upright-inverted microscope.