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
279 2024-03-20 16:00  E6-2 #2502  [High-Energy Theory Seminar] Black hole states at finite N
278 2024-05-08 16:30  E6-2 #2502  [High Energy Theory Seminar] Black Holes from Heavy Operators in N=4 SYM
277 2024-05-16 14:30  E6-2 #2502 & Zoom  [Astrophysics Seminar] Observational Cosmology with Superconducting Sensors
276 2020-11-12 16:00  E6-2 1323  2020 가을학기 광학분야 특별세미나
275 2022-01-17 14:00  E6-2 Room 2502  Five Lectures on Observational Probes of Dark Energy file
274 2016-09-02 16:00  E6-2(1st fl) #1323  Quantum Electrical Transport in Topological Insulator Nanowires
273 2016-09-02 14:30  E6-2(1st fl.), #1323  Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction
272 2023-11-09 16:00  E6-2(Natural Science B/D). 1st fl. #1323  Assessing the Capability of Near-Term Photonic Devices Towards Quantum Supremacy
271 2023-11-16 16:00  E6-2(Natural Science B/D). 1st fl. #1323  Electric-field control of emergent phenomena in correlated oxide thin films
270 2023-11-23 16:00  E6-2(Natural Science B/D). 1st fl. #1323  Deciphering the Enigma of Quantum Materials by X-ray Scattering and Spectroscopy
269 2019-06-28 14:00  E6-2, #1322  1st Research-exchange meeting of computational material physics file
268 2023-03-02 11:00  E6-2, #1322  Probing Anomalies of Non-Invertible Symmetries with Symmetry TFTs
267 2023-08-23 16:00  E6-2, #1322  [High Energy Theory Seminar] A spacetime tensor network for AdS3/CFT2
266 2023-09-18 11:00  E6-2, #1322  Magic polarisation trapping of polar molecules for tunable dipolar interactions file
265 2023-11-30 10:30  E6-2, #1322  [High-Energy Theory Seminar] 3d-3d correspondence and 2d N = (0,2) boundary conditions
264 2015-11-10 16:00  E6-2, #1323  Rapid heating of matter using high power lasers
263 2023-06-08 16:00  E6-2, #1323  Thermal decoupling in high-Tc cuprate superconductors
262 2015-11-19 16:00  E6-2, #1323  Emergent Collective Phenomena and Functions at Reduced Dimensions
261 2015-12-09 14:00  E6-2, #1323  SWELLABLE COLLOIDAL PARTICLES ARE SWELL
260 2015-12-02 16:00  E6-2, #1323  Samarium Hexaboride: Is it a Topological insulator?