{"id":62,"date":"2018-09-25T16:02:00","date_gmt":"2018-09-25T16:02:00","guid":{"rendered":"THz and THz Imaging What IS the 'killer application'\n\n<a href=\"https:\/\/www.ecs.soton.ac.uk\/people\/hnr#research\">Prof. Harvey Rutt<\/a>\n\n\u7b80\u5355\u7684\u4ecb\u7ecdThz\n\n\u9891\u7387 1THz=10^12Hz=1000GHz\n\u6ce2\u957f 300um\n\u6ce2\u6570 33cm^-1\n\u80fd\u91cf 4meV (kT=26meV at T=300K)\n\n\u4ecb\u4e8e\u7ea2\u5916\u4e0e\u5fae\u6ce2\u4e4b\u95f4\n\n\u522b\u540d\uff1aFar infrared\u3001sub-mm\u3001Te"},"modified":"2019-01-10T22:56:25","modified_gmt":"2019-01-10T14:56:25","slug":"868","status":"publish","type":"post","link":"https:\/\/blog.francis67.cc\/?p=62","title":{"rendered":"THz and THz Imaging"},"content":{"rendered":"<p>THz and THz Imaging What IS the &#8216;killer application&#8217;<\/p>\n<p><a href=\"https:\/\/www.ecs.soton.ac.uk\/people\/hnr#research\">Prof. Harvey Rutt<\/a><\/p>\n<p>\u7b80\u5355\u7684\u4ecb\u7ecdThz<\/p>\n<p>\u9891\u7387 1THz=10^12Hz=1000GHz<br \/>\n\u6ce2\u957f 300um<br \/>\n\u6ce2\u6570 33cm^-1<br \/>\n\u80fd\u91cf 4meV (kT=26meV at T=300K)<\/p>\n<p>\u4ecb\u4e8e\u7ea2\u5916\u4e0e\u5fae\u6ce2\u4e4b\u95f4<\/p>\n<p>\u522b\u540d\uff1aFar infrared\u3001sub-mm\u3001Tera Hz<\/p>\n<p>\u8fc7\u53bb\u66f4\u591a\u7528\u8fdc\u7ea2\u5916\uff0c\u6700\u8fd1\u559c\u6b22\u7528\u592a\u8d6b\u5179\uff0c\u672c\u8d28\u662f\u540c\u4e00\u4e2a\u4e1c\u897f\u3002\u5982\u679c\u73b0\u5728\u7528\u201c\u592a\u8d6b\u5179\u201d\u53bb\u641c\u7d22\uff0c\u5f80\u5f80\u4f1a\u6f0f\u6389\u5f88\u591a\u4ee5\u524d\u7684\u6587\u732e\u548c\u4e66\u7c4d\u3002<\/p>\n<p>\u7535\u5b50\u5b66\u548c\u5149\u5b66\u7684\u6027\u8d28\u6df7\u6742\u3002<\/p>\n<p>kT\u662f\u63a2\u6d4b\u7684\u6700\u5927\u95ee\u9898\uff0c\u4efb\u4f55\u6750\u6599\u90fd\u4e0d\u53ef\u907f\u514d\u3002<\/p>\n<p>THz\u901a\u4fe1\u9762\u5bf9\u7684\u57fa\u672c\u95ee\u9898<\/p>\n<ul>\n<li>very high atmospheric loss<\/li>\n<li>likely higher cost than mmW or IR<\/li>\n<li>limited source power<\/li>\n<li>higher noise temperatures<\/li>\n<li>the additional &#8216;Hz^(1\/2)&#8217; noise of hish bandwidth<\/li>\n<li>metal, anything wet, many constructional materials are high loss<\/li>\n<li>strict mechanical tolerances<\/li>\n<\/ul>\n<p>THz\u901a\u4fe1\u7684\u4f18\u70b9<\/p>\n<ul>\n<li>VAST bandwidth<\/li>\n<li>very high antenna gain from small antennas<\/li>\n<li>unregulated specturm &#8211; at the moment<\/li>\n<li>can be &#8216;convert&#8217;<\/li>\n<li>inherently short range may have advantages in some cases<\/li>\n<\/ul>\n<p>\u6574\u4f53\u7684\u601d\u8def\u662f\u8bf4\uff0c\u592a\u8d6b\u5179\u7ecf\u8fc7\u8fd9\u4e48\u591a\u5e74\u7684\u53d1\u5c55\uff0c\u4f9d\u7136\u6ca1\u6709\u5408\u9002\u7684\u5e94\u7528\u3002<\/p>\n<p>\u5728\u5b89\u68c0\u3001\u751f\u7269\u3001\u65e0\u635f\u63a2\u6d4b\u7b49\u4f20\u7edf\u9886\u57df\uff0c\u76f8\u6bd4\u522b\u7684\u6ca1\u6709\u66f4\u5927\u7684\u63d0\u5347\u3002<\/p>\n<p>\u5b9e\u9a8c\u5ba4\u7ea7\u522bOK\uff0c\u4f46\u662f\u8d70\u5411\u5b9e\u9645\u5e94\u7528\u8fd8\u4e0d\u5408\u9002\u3002<\/p>\n<p>\u53e6\u4e00\u4e2a\u601d\u8def\u662f\uff0c\u6839\u636e\u592a\u8d6b\u5179\u7684\u6027\u8d28\uff0c\u5bfb\u627e\u5176\u4ed6\u5408\u9002\u7684\u5e94\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>THz and THz Imaging What IS the &#8216;killer applicati [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[106,26],"class_list":["post-62","post","type-post","status-publish","format-standard","hentry","category-notes","tag-thz","tag-26"],"_links":{"self":[{"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=\/wp\/v2\/posts\/62","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=62"}],"version-history":[{"count":3,"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":129,"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions\/129"}],"wp:attachment":[{"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.francis67.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}