{"id":260,"date":"2022-01-05T13:54:37","date_gmt":"2022-01-05T05:54:37","guid":{"rendered":"https:\/\/www.eee.hku.hk\/microLED\/?p=260"},"modified":"2022-01-05T13:55:11","modified_gmt":"2022-01-05T05:55:11","slug":"confocal-microscopic-analysis-of-optical-crosstalk-in-gan-micro-pixel-light-emitting-diodes","status":"publish","type":"post","link":"https:\/\/www.eee.hku.hk\/microLED\/confocal-microscopic-analysis-of-optical-crosstalk-in-gan-micro-pixel-light-emitting-diodes\/","title":{"rendered":"Confocal microscopic analysis of optical crosstalk in GaN micro-pixel light-emitting diodes"},"content":{"rendered":"\n

– KH Li, YF Cheung, WS Cheung, and HW Choi<\/em><\/p>\n\n\n\n

\"\"
(a) Cross-sectional schematic diagrams depicting architectures of (a) \u03bc<\/em>LED, (b) tf-\u03bc<\/em>LED, and (c) iso-\u03bc<\/em>LED. Microphotographs showing emission from a group of pixels of the respective devices in (d)\u2013(f). Cross-sectional emission intensity maps (142\u2009\u00d7\u20091000\u2009\u03bc<\/em>m2<\/sup> along x-z plane) of the respective devices plotted on linear scale (g)\u2013(i) and logarithmic scale (j)\u2013(l). Planar intensity maps of the respective devices plotted on logarithmic scale (m)\u2013(o).<\/figcaption><\/figure>\n\n\n\n

Applied Physics Letters, vol. 107, 17, pp. 171103 (2015)<\/em><\/strong><\/p>\n\n\n\n

The optical crosstalk phenomenon in GaN micro-pixel light-emitting diodes (LED) has been investigated by confocal microscopy. Depth-resolved confocal emission images indicate light channeling along the GaN and sapphire layers as the source of crosstalk. Thin-film micro-pixel devices are proposed, whereby the light-trapping sapphire layers are removed by laser lift-off. Optical crosstalk is significantly reduced but not eliminated due to the remaining GaN layer. Another design involving micro-pixels which are completely isolated is further proposed; such devices exhibited low-noise and enhanced optical performances, which are important attributes for high-density micro-pixel LED applications including micro-displays and multi-channel optical communications.<\/p>\n\n\n\n

DOI: <\/a><\/a><\/a><\/a><\/a><\/a>10.1063\/1.4934840<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

– KH Li, YF Cheung, WS Cheung, and HW Choi Applied Physics Letters, vol. 107, 17, pp. 171103 (2015) The optical crosstalk phenomenon in GaN…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[5,4,8],"class_list":["post-260","post","type-post","status-publish","format-standard","hentry","category-publications","tag-display","tag-microled","tag-monolithic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/260","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/comments?post=260"}],"version-history":[{"count":2,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/260\/revisions"}],"predecessor-version":[{"id":263,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/260\/revisions\/263"}],"wp:attachment":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/media?parent=260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/categories?post=260"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/tags?post=260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}