{"title":"Second Harmonic Generation of q-Gaussian Laser Beam in Thermal Quantum Plasma","authors":"D. Tripathi, T. Singh, A. Vijay, K. Walia","doi":"10.1134/S1068337225700574","DOIUrl":null,"url":null,"abstract":"<p>Second harmonic generation of <i>q</i>-Gaussian laser beam in thermal quantum plasma is investigated in present communication. There is production of transverse gradients of intensity in relativistic plasma due to self-focusing of main beam. These intensity gradients cause electron plasma wave excitation at frequency of main beam. The interaction of excited electron plasma wave with main beam generates 2nd harmonics. Nonlinear differential equation denoting behavior of beam waist of main beam and 2nd harmonics efficiency are derived by using paraxial theory. These equations are numerically solved for investigating impact of usual parameters of laser, plasma along with quantum contribution on beam waist and efficiency of 2nd harmonics. Comparison of current study is also done with cold quantum plasma and classical relativistic plasma cases.</p>","PeriodicalId":623,"journal":{"name":"Journal of Contemporary Physics (Armenian Academy of Sciences)","volume":"60 2","pages":"171 - 180"},"PeriodicalIF":0.4000,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Contemporary Physics (Armenian Academy of Sciences)","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1068337225700574","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Second harmonic generation of q-Gaussian laser beam in thermal quantum plasma is investigated in present communication. There is production of transverse gradients of intensity in relativistic plasma due to self-focusing of main beam. These intensity gradients cause electron plasma wave excitation at frequency of main beam. The interaction of excited electron plasma wave with main beam generates 2nd harmonics. Nonlinear differential equation denoting behavior of beam waist of main beam and 2nd harmonics efficiency are derived by using paraxial theory. These equations are numerically solved for investigating impact of usual parameters of laser, plasma along with quantum contribution on beam waist and efficiency of 2nd harmonics. Comparison of current study is also done with cold quantum plasma and classical relativistic plasma cases.
期刊介绍：
Journal of Contemporary Physics (Armenian Academy of Sciences) is a journal that covers all fields of modern physics. It publishes significant contributions in such areas of theoretical and applied science as interaction of elementary particles at superhigh energies, elementary particle physics, charged particle interactions with matter, physics of semiconductors and semiconductor devices, physics of condensed matter, radiophysics and radioelectronics, optics and quantum electronics, quantum size effects, nanophysics, sensorics, and superconductivity.
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