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Scattering And Absorption of Light in Planetary Regoliths
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Perfect absorption in complex scattering systems with or without hidden symmetries.

Lei Chen1,2, Tsampikos Kottos3, Steven M Anlage4,5

  • 1Quantum Materials Center, Department of Physics, University of Maryland, College Park, MD, 20742, USA. LChen95@umd.edu.

Nature Communications
|November 18, 2020
PubMed
Summary

This study demonstrates a novel wavefront shaping (WFS) scheme using coherent perfect absorption (CPA) to efficiently deposit energy in complex, non-symmetric environments. This breakthrough enhances applications in telecommunications and wireless power transfer.

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Area of Science:

  • Electromagnetics
  • Wave Physics
  • Applied Physics

Background:

  • Wavefront shaping (WFS) faces challenges in energy deposition for complex, non-symmetric environments.
  • Existing WFS protocols are often hindered by intricate interference paths within enclosures.

Purpose of the Study:

  • To demonstrate a general WFS scheme for efficient energy deposition in weakly lossy targets.
  • To establish coherent perfect absorption (CPA) in systems lacking geometric symmetries.

Main Methods:

  • Utilized a network of coupled transmission lines with complex connectivity to eliminate geometric symmetries.
  • Controlled local losses and time-reversal symmetry violation using a magnetic field.

Main Results:

  • Successfully demonstrated a general WFS scheme based on CPA protocols.
  • Established CPA in a system with complex connectivity and absence of geometric symmetries.
  • Showcased control over local losses and time-reversal symmetry violation.

Conclusions:

  • The developed WFS scheme based on CPA is effective in complex, non-symmetric environments.
  • This work extends the concept of CPA beyond laser cavities.
  • The platform offers new insights into CPA formation using semiclassical tools.