Integrated multi-scheme digital modulations of spoof surface plasmon polaritons
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. RESEARCH PAPER .
October 2020, Vol. 63 202302:1–202302:10 https://doi.org/10.1007/s11432-020-2972-0
Integrated multi-scheme digital modulations of spoof surface plasmon polaritons Lepeng ZHANG1 , Haochi ZHANG1 , Min TANG2* , Peihang HE1 , Lingyun NIU1 , Liangliang LIU3 , Jiayuan LU1 , Wenxuan TANG1 , Junfa MAO2 & Tiejun CUI1* 1 State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China; Key Laboratory of Ministry of Education of China for Research of Design and Electromagnetic Compatibility of High Speed Electronic Systems, Shanghai Jiao Tong University, Shanghai 200240, China; 3 Research Center of Applied Electromagnetics, School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
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Received 31 March 2020/Accepted 24 June 2020/Published online 16 September 2020
Abstract The future wireless communications require different kinds of modulation functions to be integrated in a single intelligent device under different scenarios. Here, we propose a multi-scheme digital modulator to achieve this goal based on integrated spoof surface plasmon polaritons (SPP) in different frequency bands. By constructing switchable spoof SPP units, the propagating wave in the proposed spoof SPP waveguide can be manipulated in amplitude domain, frequency domain, and phase domain. As a proof of concept, the integrated multi-scheme digital modulator is experimentally verified to achieve at least three kinds of modulations, including amplitude shift keying, phase shift keying, and frequency shift keying, in a single digital spoof plasmonic waveguide. The simulated and measured results show that the modulator has excellent property of field confinement and is capable of frequency-domain modulation. Hence, the multi-scheme modulation property makes the proposed SPP digital modulator be an effective and reliable candidate for efficient manipulations of SPP waves and for advanced modulation technology. Keywords spoof surface plasmon polaritons, dynamic manipulation, multi-scheme modulation, dispersion engineering, frequency modulation Citation Zhang L P, Zhang H C, Tang M, et al. Integrated multi-scheme digital modulations of spoof surface plasmon polaritons. Sci China Inf Sci, 2020, 63(10): 202302, https://doi.org/10.1007/s11432-020-2972-0
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Introduction
Modulation technologies based on electromagnetic (EM) characteristics such as amplitude, phase, and frequency are the basis of modern communications. Among them, the amplitude shift keying (ASK), phase shift keying (PSK), and frequency shift keying (FSK) are regarded as the most fundamental schemes, showing their irreplaceable advantages in different aspects such as power consumption, spectrum occupancy, and efficiency [1–3]. For example, ASK has the advantages of low cost and low power consumption; FSK is used in data transmission due to its low attenuation; while PSK has the strongest anti-interference capability and has been widely used in space communications. Hence, to meet the requi
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