Optical tuning of extraordinary optical transmission through a metallic hole array using azobenzene dye-doped nematic liquid crystal

Optical tuning of extraordinary optical transmission (EOT) through a metallic hole array is achieved using an azobenzene dye-doped nematic liquid crystal. The liquid crystal is aligned homeotropically on the hole array and is sandwiched by a counter substrate placed at a distance of approximately 1...

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Veröffentlicht in:Japanese Journal of Applied Physics 2014-01, Vol.53 (1S), p.1-1-01AE02-5
Hauptverfasser: Kobashi, Junji, Yoshida, Hiroyuki, Matsui, Takayuki, Miura, Atsushi, Ikeda, Naoki, Sugimoto, Yoshimasa, Fujikawa, Hisayoshi, Ozaki, Masanori
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Sprache:eng
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Zusammenfassung:Optical tuning of extraordinary optical transmission (EOT) through a metallic hole array is achieved using an azobenzene dye-doped nematic liquid crystal. The liquid crystal is aligned homeotropically on the hole array and is sandwiched by a counter substrate placed at a distance of approximately 1 µm from the hole array. Upon UV irradiation, the azobenzene dye photo-isomerizes from the trans conformation to the cis conformation and disturbs the liquid crystalline order, causing a decrease in the effective refractive index. The tuning range achieved was 80 nm, and corresponded to a refractive index shift of 0.086. Optical tuning of EOT properties is potentially important for future all-optical processing of signals.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.53.01AE02