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Controlling Surface Plasmon Optical Transmission with an Electrochemical Switch Using Conducting Polymer Thin Films
Author(s) -
Baba Akira,
Tada Kohji,
Janmanee Rapiphun,
Sriwichai Saengrawee,
Shinbo Kazunari,
Kato Keizo,
Kaneko Futao,
Phanichphant Sukon
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201200373
Subject(s) - materials science , surface plasmon resonance , thin film , electrochromism , optoelectronics , polyaniline , conductive polymer , plasmon , surface plasmon , grating , polymer , nanotechnology , nanoparticle , electrode , composite material , chemistry , polymerization
Surface plasmon resonance (SPR)‐enhanced optical transmission is actively controlled by an electrochromism of conducting polymer thin films. Polyaniline and poly(3,4‐ethylenedioxythiophene) thin films are deposited on a thin gold grating surface. SPR‐enhanced optical transmission is demonstrated by irradiating white light on the conducting polymer thin film–gold grating surface and detecting the transmitted light from the back side. The transmission SPR system is combined with an electrochemical setup to manipulate the resonance. The wavelength of the sharp peak in the transmission light spectra is tuned by electrochemical doping/dedoping of the conducting polymer thin films. The present study of controllable SPR‐enhanced optical transmission should provide novel active plasmonic devices such as active bandpass filters or biosensors.