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Sharp electromagnetically induced absorption via balanced interferometric excitation in a microwave resonator

Michael T. Hatzon*, Graeme R. Flower, Maxim Goryachev, Jeremy F. Bourhill, and Michael E. Tobar

  • *Contact author: michael.tobar@uwa.edu.au, 22873723@student.uwa.edu.au
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Phys. Rev. Applied 23, 024058 – Published 21 February, 2025

DOI: https://doi.org/10.1103/PhysRevApplied.23.024058

Abstract

A cylindrical TM0,1,0 mode microwave cavity resonator was excited using a balanced interferometric configuration that allowed manipulation of the electric field and potential within the resonator by adjusting the phase and amplitude of the interferometer arms driving the resonator. With precise tuning of the phase and amplitude, 25-dB suppression of the electric field at the resonance frequency was achieved while simultaneously resonantly enhancing the time-varying electric-scalar potential. Under these conditions, the system demonstrated electromagnetically induced absorption in the cavity response due to the annulment of the electric field at the resonance frequency. This phenomena can be regarded as a form of extreme dispersion, and led to a sharp increase in the cavity phase versus frequency response by an order of magnitude when compared to the cavity Q factor. This work presents an experimental setup that will allow the electric-scalar Aharonov-Bohm effect to be tested under conditions involving a time-varying electric-scalar potential, without the presence of an electric field or magnetic vector potential, an experiment that has not yet been realized.

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Corrections

17 March, 2025

Correction: A production error in the affiliation has been fixed.

Article Text

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Outline

Information

Phys. Rev. Applied 23, 024058– Published 21 February, 2025
  • Received 16 October 2024
  • Revised 19 January 2025
  • Accepted 4 February 2025
  • Corrected 17 March 2025
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