Enhanced Radio-Frequency Sensors Based on a Self-Dual Emitter-Absorber

Minye Yang, Zhilu Ye, Mohamed Farhat, and Pai-Yen Chen
Phys. Rev. Applied 15, 014026 – Published 14 January 2021

Abstract

We propose and experimentally demonstrate a parity-time-symmetric electronic system exhibiting the self-dual emitter-absorber property with a remarkable modulation depth in the radio-frequency (rf) region. The dramatically different rf responses between the emitter and absorber modes may allow detection of ultrasmall conductive or reactive perturbations. Our measurement results show that even a perturbation on the order of 102 can greatly change the system’s output intensity by more than 30 dB, consistent with the theoretical prediction. The measured sensitivity is far beyond the sensitivity of traditional sensors based on a Fabry-Perot resonator, and may lead to monotonic rf sensors with high sensitivity and resolvability.

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  • Received 10 September 2020
  • Revised 18 November 2020
  • Accepted 8 December 2020

DOI:https://doi.org/10.1103/PhysRevApplied.15.014026

© 2021 American Physical Society

Physics Subject Headings (PhySH)

General PhysicsAtomic, Molecular & OpticalNonlinear DynamicsCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Minye Yang1, Zhilu Ye1, Mohamed Farhat2, and Pai-Yen Chen1,*

  • 1Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
  • 2Computer, Electrical, and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia

  • *pychen@uic.edu

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Vol. 15, Iss. 1 — January 2021

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