Light-driven tunable dual-band plasmonic absorber using liquid-crystal-coated asymmetric nanodisk array

Yanhui Zhao, Qingzhen Hao, Yi Ma, Mengqian Lu, Bingxin Zhang, Michael Lapsley, Iam Choon Khoo, Tony Jun Huang

Research output: Contribution to journalArticle

61 Scopus citations

Abstract

We experimentally demonstrated a light-driven reconfigurable near perfect plasmonic absorber working at dual frequencies in infrared range. By employing nanodisks with different sizes in certain arrangement, near perfect absorption of incident electromagnetic waves can be achieved for different working frequencies due to the resonance between the incident light and the nanodisk of different sizes. We showed that optically induced changes in the dielectric constant of the adjacent liquid crystal layer is an effective means to tune the absorption bands of an asymmetric gold nanodisk array. Our liquid crystal based infrared plasmonic absorber can be tuned by using visible light in real time. A tunable range of 25 nm has been confirmed by both simulation and experiment.

Original languageEnglish (US)
Article number053119
JournalApplied Physics Letters
Volume100
Issue number5
DOIs
StatePublished - Jan 30 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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