Active absorption of electromagnetic pulses in a cavity

2014/12/09 by S. A. R. Horsley, Horsley, S. A. R., Robert Foster +5
Physics and Astronomy · #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Mechanical and Optical Resonators #Optics (physics.optics) #Quantum and Classical Electrodynamics

paper · pdf · doi:10.48550/arxiv.1412.3157

openalex publication_date 2014/12/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We show that a pulse of electromagnetic radiation launched into a cavity can be completely absorbed into an infinitesimal region of space, provided one has a high degree of control over the current flowing through this region. We work out explicit examples of this effect in a cubic cavity and a cylindrical one, and experimentally demonstrate the effect in the microwave regime.

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