visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2015-07-23 13:30 
일시 2015/07/23,1:30PM 
장소 E4, B401 
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)

번호 날짜 장소 제목
435 2022-07-21 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Quintessential axions file
434 2023-12-14 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Superconducting qubits for large-scale quantum computers file
433 2022-09-21 16:00  College of Natural Science E6-2, Rm. 1323  Materials and Device Nanofabrication of Optical Metasurfaces file
432 2015-03-13 14:00  Connect Room, KI Bldg.  The 15th Innovative Workshop on Soft/Bio Materials file
431 2015-12-09 11:00  E4(KI Building), Connect room (2nd fl.)  Functional Imaging & Monitoring of Brain & Breast with Diffuse Light
430 2015-12-17 11:00  E4(KI Building), Matrix Hall (2nd fl.)  Wavefront engineering for in-vivo Deep brain imaging
» 2015-07-23 13:30  E4, B401  Enhanced ZnO based UV photonics and related applications file
428 2023-04-28 11:00  E6 #1323  Tkachenko wave: From the modern field theory viewpoint
427 2023-05-17 14:00  E6 #1323  Optical Response in the multilayer thin films
426 2022-10-06 13:00  E6 #1323  Counting States with Global Symmetry
425 2022-04-13 10:30  E6 #1323/zoom  Harnessing topology and correlations from singularities in 3d-kagome metals
424 2022-01-11 15:00  E6 #1501  Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I file
423 2022-01-26 13:00  E6 #1501  An Introduction to Cohomology groups file
422 2022-08-01 10:00  E6 #1501 & Zoom  [Update 세미나 영상] James Webb Space Telescope & OTE Commissioning
421 2022-07-14 14:15  E6 #1501 & Zoom  Hund and electronic correlations in ruthenium-based systems
420 2022-07-14 15:00  E6 #1501 & Zoom  Pure two-dimensional quantum electron liquid and its phase transition
419 2022-07-14 13:30  E6 #1501 & Zoom  Electronic structure and anomalous transport properties of topological materials by first principle calculation
418 2022-10-24 16:00  E6 #1501(공동강의실)  Physics Colloquim(Fall 2022) file
417 2022-01-25 15:00  E6 #1501/online  Emulating twisted double bilayer graphene with a multiorbital optical lattice file
416 2022-03-31 10:00  E6 #1501/zoom  Weiss fields for Quantum Spin Dynamics file