{"title":"Optical Pulses in a Non-Hermitian Medium near a Singularity","authors":"V. A. Bushuev, B. I. Mantsyzov","doi":"10.1134/S1062873824709048","DOIUrl":null,"url":null,"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>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"1 - 6"},"PeriodicalIF":0.4800,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Russian Academy of Sciences: Physics","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1062873824709048","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Physics and Astronomy","Score":null,"Total":0}
引用次数: 0
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.
期刊介绍：
Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.
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