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Title: Reconfigurable parametric amplifications of spoof surface plasmons
Authors: Gao, Xinxin
Zhang, Jingjing
Luo, Yu
Ma, Qian
Bai, Guo Dong
Zhang, Hao Chi
Cui, Tie Jun
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2021
Source: Gao, X., Zhang, J., Luo, Y., Ma, Q., Bai, G. D., Zhang, H. C. & Cui, T. J. (2021). Reconfigurable parametric amplifications of spoof surface plasmons. Advanced Science, 8(17), 2100795-.
Project: MOE 2018-T2-2-189 (S) 
Journal: Advanced Science 
Abstract: Next-generation inter-chip communication requires ultrafast ultra-compact interconnects. Designer plasmonics offers a possible route towards this goal. Further development of the plasmonic technique to circuit applications requires the direct amplification of plasmonic signals on a compact platform. However, significant signal distortions and limited operational speeds prevent the application of traditional MOS-based amplifiers to plasmonics. Up to day, the amplification of surface plasmons without phase distortion has remained a scientific challenge. In this work, the concept of parametric amplification (PA) is transplanted to the plasmonics and is realized experimentally an ultrathin reconfigurable PA using a spoof surface plasmon polariton (SSPP) waveguide integrated with tunable and nonlinear varactors. The measured parametric gain in the experiment can reach up to 9.14 dB within a short nonlinear propagation length, for example, six SSPP wavelengths, in excellent agreement with the theoretical prediction. By tuning the bias voltage of varactors, the phase-matching condition can be precisely controlled over a broad frequency band, enabling the authors to realize the multi-frequency PA of plasmonic signals. Measured phase responses confirm that the plasmonic parametric amplifier can significantly suppress the signal distortions as compared with the traditional MOS-based amplifier, which is a property highly desired for ultrafast wireless communication systems and integrated circuits.
ISSN: 2198-3844
DOI: 10.1002/advs.202100795
Rights: © 2021 The Authors. Advanced Science published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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