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

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Abstract

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.

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Acknowledgement

The authors acknowledge financial support from the Ministry of Science and Technology, Taiwan (Grant No. 104-2112-M-006-005-MY3). They are also grateful to the National Center for High-Performance Computing, Taiwan, for its support.

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Authors and Affiliations

  1. Department of Photonics and Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, 70101, Taiwan

    Hsiang-Hao Wu & Yung-Chiang Lan

  2. Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, 106, Taiwan

    Bo Han Cheng

Authors
  1. Hsiang-Hao Wu
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  2. Bo Han Cheng
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  3. Yung-Chiang Lan
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Correspondence to Yung-Chiang Lan.

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Wu, HH., Cheng, B.H. & Lan, YC. Coherent-Controlled All-Optical Devices Based on Plasmonic Resonant Tunneling Waveguides. Plasmonics 12, 2005–2011 (2017). https://doi.org/10.1007/s11468-016-0474-0

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  • DOI: https://doi.org/10.1007/s11468-016-0474-0

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