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Abstract <p>The spectral method was used to solve the problem of interaction of short optical pulses with PT‑symmetric photonic crystals under conditions of frequency singularity. It was shown that, at a small deviation from the exceptional point of spontaneous decay of PT-symmetric field modes, frequency singularities of the transmission and reflection coefficients of the structure arise. This leads to a significant narrowing of the pulse spectra and an increase in their amplitude and duration with unidirectional Bragg reflection.</p>

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Optical Pulses in a Non-Hermitian Medium near a Singularity

  • 期刊论文

  • 发表日期：

    2025年1月1日

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  • V. A. Bushuev,
  • B. I. Mantsyzov

摘要

Abstract

The spectral method was used to solve the problem of interaction of short optical pulses with PT‑symmetric photonic crystals under conditions of frequency singularity. It was shown that, at a small deviation from the exceptional point of spontaneous decay of PT-symmetric field modes, frequency singularities of the transmission and reflection coefficients of the structure arise. This leads to a significant narrowing of the pulse spectra and an increase in their amplitude and duration with unidirectional Bragg reflection.