Coherent-Controlled All-Optical Devices Based on Plasmonic Resonant Tunneling Waveguides

Hsiang Hao Wu, Bo Han Cheng, Yung Chiang Lan

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In this study, the signal processing in three-port and four-port plasmonic coupler devices by coherently controlling the phases and amplitudes of launched surface plasmons is investigated by finite-difference time-domain method (FDTD) simulation. This device is composed of two metal-dielectric-metal waveguides with a strip cavity imbedded in the shared metal layer. Interference between the plasmonic signals of two input ports is caused by the tunneling effect of surface plasmons in the strip cavity. The functions of signal modulation, recovery, filtering, and plasmon-induced transparency (PIT) of the proposed devices are proposed and demonstrated. The all-optical logic gates based on the proposed devices are also designed and verified.

Original languageEnglish
Pages (from-to)2005-2011
Number of pages7
Issue number6
Publication statusPublished - 2017 Dec 1

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biophysics
  • Biochemistry


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