{"id":212060,"date":"2025-04-22T02:16:03","date_gmt":"2025-04-22T07:16:03","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2025\/04\/researchers-develop-compact-superradiant-smith-purcell-device-with-ultra-narrow-linewidth"},"modified":"2025-04-22T02:16:03","modified_gmt":"2025-04-22T07:16:03","slug":"researchers-develop-compact-superradiant-smith-purcell-device-with-ultra-narrow-linewidth","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2025\/04\/researchers-develop-compact-superradiant-smith-purcell-device-with-ultra-narrow-linewidth","title":{"rendered":"Researchers develop compact superradiant Smith-Purcell device with ultra-narrow linewidth"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/researchers-develop-compact-superradiant-smith-purcell-device-with-ultra-narrow-linewidth.jpg\"><\/a><\/p>\n<p>Superradiant Smith-Purcell radiation (S-SPR) is a kind of free electron radiation with a train of free electron bunches passing over a periodic grating. In theory, the ultra-narrow spectral linewidth of S-SPR could be realized, which would be greatly beneficial to various applications such as imaging, sensing and communication.<\/p>\n<p>However, in the free electron accelerators, customized setups and orotrons, the instability of electron <a href=\"https:\/\/phys.org\/tags\/kinetic+energy\/\" rel=\"tag\" class=\"\">kinetic energy<\/a>, coulomb effect and the finite number of electron bunches worsened the radiation linewidth, and the large size of equipment limits the application scenarios.<\/p>\n<p><a href=\"https:\/\/doi.org\/10.1186\/s43593-025-00083-z\" target=\"_blank\">In a new paper<\/a> published in <i>eLight<\/i>, a team of scientists, led by Professor Fang Liu and Yidong Huang from the Department of Electronic Engineering, Tsinghua University, China, have developed the first compact S-SPR device with ultra-narrow and continuously tunable spectral linewidth.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Superradiant Smith-Purcell radiation (S-SPR) is a kind of free electron radiation with a train of free electron bunches passing over a periodic grating. In theory, the ultra-narrow spectral linewidth of S-SPR could be realized, which would be greatly beneficial to various applications such as imaging, sensing and communication. However, in the free electron accelerators, customized [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1497,1491],"tags":[],"class_list":["post-212060","post","type-post","status-publish","format-standard","hentry","category-energy","category-transportation"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/212060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=212060"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/212060\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=212060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=212060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=212060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}