A frequency-addressed plasmonic switch based on dual-frequency liquid crystals

Yan Jun Liu, Qingzhen Hao, Joseph S.T. Smalley, Justin Liou, Iam Choon Khoo, Tony Jun Huang

Research output: Contribution to journalArticlepeer-review

91 Scopus citations


A frequency-addressed plasmonic switch was demonstrated by embedding a uniform gold nanodisk array into dual-frequency liquid crystals (DFLCs). The optical properties of the hybrid system were characterized by extinction spectra of localized surface plasmon resonances (LSPRs). The LSPR peak was tuned using a frequency-dependent electric field. A ∼4 nm blueshift was observed for frequencies below 15 kHz, and a 23 nm redshift was observed for frequencies above 15 kHz. The switching time for the system was ∼40 ms. This DFLC-based active plasmonic system demonstrates an excellent, reversible, frequency-dependent switching behavior and could be used in future integrated nanophotonic circuits.

Original languageEnglish (US)
Article number091101
JournalApplied Physics Letters
Issue number9
StatePublished - Aug 30 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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