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Enhanced ZnO based UV photonics and related applications

2015.07.23 11:14

물리학과 조회 수:818

장소 E4, B401 
일시 2015/07/23,1:30PM 
연사 Prof. Gilles Lérondel (Univ. of Technology of Troyes) 

Enhanced ZnO based UV photonics and related applications

2015/07/23, Thu, 1:30PM, E4 B401

Prof. Gilles Lérondel, Univ. of Technology of Troyes

 

Widedirectbandgapaswellaslargeexcitonbindingenergyandrelativelyhighrefractiveindex,areonlyafewoftheintrinsicpropertiesmakingzincoxideextremelyrelevantforUVphotonicsandrelatedapplications.DespitenumerousstudiesonZnOsincethefirstobservationatroomtemperatureofUVstimulatedemission[1]inepitaxialthinfilm,resonantlight-matterinteractionviaperiodicpatterningattheemissiondiffractionlimit(∽100nm),stillremainamajorissuewhateverthemateriali.e.thinfilmsornanowires.WewillreviewsomeofourlatestresultsobtainedtowardsthisgoalonwaveguidinghighqualityepitaxialthinfilmsgrownonsapphireeitherbyPLDorOCVD.Wewillstartwiththeobservationofrandomlasing[1]andhighgainandlowloss[2]insuchathinfilm.WewillthenshowhowhighgainandlowlosscanbeusedforanewkindofefficientopticalenergytransferbetweenZnOandultrathinluminescentfilms[3].Wewillthenfinallydiscussaboutthepatterningissueofsuchhighqualityepitaxialthinfilmusingtop-downapproach.Whileresonantpatterningisdesirableforafullcontrolofthespontaneousemissionrate,micronscalestructuringcombinedwithin-planewaveguidingcanalsoleadtoenhancedstimulatedemissioni.e.lowerthresholdandhigherinternalquantumefficiency[4].Suchwaveguidingenhancedpropertiesareespeciallyrelevantforsolidstatelightingandsensingapplications.

 

 

Contact: Prof. Yong-Hoon Cho (yonghcho@kaist.ac.kr, 2549)

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271 Apr. 09 (Mon.), 11:00 AM  E6-2. 1st fl. #1323  Dr. Seung-Sup B. Lee  Doublon-holon origin of the subpeaks at the Hubbard band edges file
270 Mar. 29 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Seung Hyub Baek  Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
269 Mar. 16 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. JinHee Kim  산화물 다층박막에서의 다양한 물리현상 file
268 Nov. 1 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. YoungWook Kim  Squeezing the best out of 2D materials file
267 May. 11 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Kun Woo Kim  Disordered Floquet topological insulators file
266 Apr. 12 (Tue.), 4 PM  E6-2. 1st fl. #1323  Dr. Jeehoon Kim, POSTECH  Confinement of Superconducting Vortices in Magnetic Force Microscopy
265 Dec. 7 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Joon Ho Jang  Novel probes of interacting electrons in 2D systems file
264 Sep. 10 (Tue.), 03:00 PM  E6-2. 1st fl. #1323  Dr. Mikhail Kiselev  Two-Stage Kondo Effect file
263 Jun. 01 (Fri.), 11:00 AM  E6-2. 1st fl. #1323  Dr. Seung Sae Hong  Topological phases in low-dimensional quantum materials file
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260 Oct. 18 (Tue.), 3PM  E6-2. 1st fl. #1323  Dr. JunHo Suh, Korea Research Institute of Standards and Science  “Hybrid quantum systems with mechanical oscillators”
259 May. 17 (Thu.), 01:30 PM  E6-2. 1st fl. #1323  Prof. Yong-Baek Kim University of Toronto  Quantum Spin Liquid in Kitaev Materials file
258 DEC. 27 (Thu), 04:00 PM  E6-2. 1st fl. #1323  Prof. Na Young Kim  Quantum Innovation (QuIN) Laboratory file
257 Sep. 27 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Joon Sue Lee  Spin-charge conversion in topological insulators for spintronic applications file
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254 Nov. 9 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Pilkyung Moon  Moiré superlattices – from twisted bilayer graphene to quasicrystal file
253 DEC. 11 (Tue), 04:00 PM  E6-2. 1st fl. #1323  Prof. Hiroshi Shinaoka  Natural compact representation of Matsubara Green’s functions: applications to analytic continuation and quantum many-body simulations file
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