{"id":29356,"date":"2012-07-01T09:06:15","date_gmt":"2012-07-01T07:06:15","guid":{"rendered":"https:\/\/www.ufe.cz\/pozvanka-na-prednasku-prof-sajeev-john\/"},"modified":"2025-08-25T09:22:10","modified_gmt":"2025-08-25T07:22:10","slug":"invitation-to-a-lecture-prof-sajeev-john","status":"publish","type":"post","link":"https:\/\/www.ufe.cz\/en\/invitation-to-a-lecture-prof-sajeev-john\/","title":{"rendered":"Invitation to a lecture: Prof. Sajeev John"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"29356\" class=\"elementor elementor-29356 elementor-29348\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1f5e3a5 e-flex e-con-boxed e-con e-parent\" data-id=\"1f5e3a5\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1b84db7 elementor-widget elementor-widget-text-editor\" data-id=\"1b84db7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Photonic band gap(PBG) materials [1,2] are artificial periodic dielectric mictrostructures capable of trapping light in 3D [3] on subwavelength scales without absorption loss. This offers new opportunities for efficient solar energy trapping and harvesting in suitably micro-structured thin films [4-6]. It also enables virtually complete control of the low of light on microscopic scales in a 3D optical chip [7-9] as well as very strong coupling of light to matter where desired. By further engineering the electromagnetic density of states [10-12], it is possible to realize unprecendented coherent optical control of the quantum state of resonant atoms or quantum dots [13,14].This defines fundamentally new strong-coupling regime for quantum optics.\u00a0<br \/>I review some of the underlying physics and numerical approaches to describing light trapping in photonic crystals. I also discuss ongoing challenges to experimentally realize the consequences of this remarkable effect.<\/p><p>1. S. John, Physical Review Letters 58, 2486 (1987)<br \/>2. E. Yablonovitch, Physical Review Letters 58, 2059 (1987)<br \/>3. S. John, Physical Review Letters 53, 2169 (1984)<br \/>4. A. Chutinan and S. John, Physical Review A 78, 023825 (2005)<br \/>5. G. Demesy and S. John, J. Appl. Physics (in press)<br \/>6. A. Deinega and S. John, J. Appl. Physics (submitted)<br \/>7. A. Chutinan, S. John and O. Toader, Phys. Rev. Lett. 90, 123901 (2003)<br \/>8. A. Chutinan and S. John, Physical Review B 72, 161316 (2005)<br \/>9. A. Chutinan and S. John, Optics Express A 14, 1266 (2006)<br \/>10. D. Vujic and S. John, Physical Review A 76, 063814 (2007)<br \/>11. R.Z. Wang and S. John, Physical Review A 70, 043805 (2004)<br \/>12. R.Z. Wang and S. John, J. Photonics and Nanostructures(Elsevier) 2, 137 (2004)<br \/>13. Xun Mia and S. John, Physical Review Letters 103, 233601 (2009)<br \/>14. Xun Mia and S. John, Physical Review A 80, 063810 (2009)<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Prof. Sajeev John will give a lecture on Photonic Band Gap Materials: Light Trapping Crystals. The lecture will be held in English on Monday, July 9, 2012, at 11:00 a.m. in the large hall of our Institute.<\/p>\n","protected":false},"author":7,"featured_media":29350,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[51],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/posts\/29356"}],"collection":[{"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/comments?post=29356"}],"version-history":[{"count":0,"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/posts\/29356\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/media\/29350"}],"wp:attachment":[{"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/media?parent=29356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/categories?post=29356"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ufe.cz\/en\/wp-json\/wp\/v2\/tags?post=29356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}