Chenyin Dai, Yuxuan Chen, Xiangyu La, Zhen Tian, Jianming Dai
{"title":"Lateral terahertz emission from shaped plasma excited by colliding laser pulses.","authors":"Chenyin Dai, Yuxuan Chen, Xiangyu La, Zhen Tian, Jianming Dai","doi":"10.1364/OL.553691","DOIUrl":null,"url":null,"abstract":"<p><p>Plasma-based terahertz (THz) sources are generally limited by a saturation effect and consequent optical-THz conversion efficiency. Extending plasma volume is an effective approach to mitigate the saturation effect and increase THz generation efficiency. By reshaping gas plasma using two pairs of cylindrical lens to focus two counter-propagating laser pulses, we demonstrate enhanced broadband coherent THz radiation through the interaction of colliding laser pulses with gas plasma. The use of the cylindrical lens pairs changes the plasma shape to mitigate the THz saturation and increase the THz generation efficiency. The peak THz amplitude generated by cylindrical lens pairs is more than twice of that by spherical lenses. This method provides an important option for the development of promising terahertz sources.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 6","pages":"1933-1936"},"PeriodicalIF":3.1000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.553691","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
Lateral terahertz emission from shaped plasma excited by colliding laser pulses.
Plasma-based terahertz (THz) sources are generally limited by a saturation effect and consequent optical-THz conversion efficiency. Extending plasma volume is an effective approach to mitigate the saturation effect and increase THz generation efficiency. By reshaping gas plasma using two pairs of cylindrical lens to focus two counter-propagating laser pulses, we demonstrate enhanced broadband coherent THz radiation through the interaction of colliding laser pulses with gas plasma. The use of the cylindrical lens pairs changes the plasma shape to mitigate the THz saturation and increase the THz generation efficiency. The peak THz amplitude generated by cylindrical lens pairs is more than twice of that by spherical lenses. This method provides an important option for the development of promising terahertz sources.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
