Plasmonics

, Volume 8, Issue 2, pp 233–237

Efficient All-Optical Molecule-Plasmon Modulation Based on T-shape Single Slit

Article

DOI: 10.1007/s11468-012-9380-2

Cite this article as:
Chen, J., Li, Z., Xiao, J. et al. Plasmonics (2013) 8: 233. doi:10.1007/s11468-012-9380-2

Abstract

Efficient all-optical molecule-plasmon modulation is experimentally demonstrated by employing a compact T-shape single slit on a metal film coated with an azopolymer film, in which the azobenzene molecules can be reoriented by a pump beam. In the T-shape single slit, the transmission spectra exhibit periodic behaviors and are quite sensitive to variations of the refractive index of the azopolymer in the groove. Under a pump beam, the azobenzene molecules are reoriented, so the SPPs in the groove feel a refractive index quite different from that of the originally isotropic azopolymer with randomly orientations. This leads to a high modulation depth of about 53 % (3.3 dB) and a phase variation of >π experimentally.

Keywords

Surface plasmon polaritonsAll opticsModulationMolecule reorientations

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Jianjun Chen
    • 1
    • 2
    • 3
  • Zhi Li
    • 3
  • Jinghua Xiao
    • 1
    • 2
  • Qihuang Gong
    • 3
  1. 1.State Key Laboratory of Information Photonics and Optical CommunicationsBeijing University of Posts and TelecommunicationsBeijingChina
  2. 2.School of ScienceBeijing University of Posts and TelecommunicationsBeijingChina
  3. 3.State Key Laboratory for Mesoscopic Physics and Department of PhysicsPeking UniversityBeijingChina