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2020 가을학기 광학분야 특별세미나

2020.11.10 08:21

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장소 E6-2 1323 
일시 Nov. 12 (Thu.) 4:00 PM 
연사 김영덕 (Young Duck Kim) 교수 

Title: Two-dimensional van der Waals Heterostructures for Next-generation Light Source


Speaker: (Department of Physics, Kyung Hee University) 교수님 (Young Duck Kim) 김영덕


Place: E6-2 1323

(Available seats are very limited.Please enroll your information in this link to get access: )


Online address (zoom):


Date: 4pm, 11/12



Two-dimensional (2D) van der Waals materials including graphene, hexagonal boron nitride (hBN) and transition metal dichalcogenides (TMDCs) such as MoS2 and WSe2 have great potential for exploring the exotic quantum behaviors and realization of advanced optoelectronics devices. Especially, ultrafast light emitter in nanoscale is a critical component in the development of the high bandwidth on-chip optical interconnects. However, previous technology faces the major challenges such as big footprint, high cost integration and difficulties of direct high speed electrical pumping. Here, I will talk the first electrically driven ultrafast graphene light emitter that exhibits the ultrafast light modulation up to ~ 10 GHz with broad spectral range (visible to near infrared). Atomically thin hBN encapsulation layers to graphene allow the stable and practical high performance even under the ambient condition as well as efficient direct electronic cooling via near-field coupling of hybrid plasmon-phonon polaritonic modes. Ultrafast and broadband graphene light emitter paves the way towards the realization of complete graphene-based ultrafast optical communications.  I will also present the near UV (~390nm) electroluminescence (EL) and broadband photodetection from hBN heterostructures. Near UV EL in hBN are attributed to the electric field induced artificial color centers, which are vacancy-related defects with an excitonic mode in the intrinsic band gap of hBN (> 6 eV). These results demonstrate the promise of hBN-based van der Waals heterostructures for light sources and optoelectronics in the near UV to the visible regime. 


주관: 라영식 교수

번호 일시 장소 연사 제목
공지 2019/09/18 - 12/5  Seminar Room #1323  Prof. David Schuster and etc.  Fall 2019: Physics Seminar Serises
공지 2019/09/02 - 12/09  Seminar Room 1501  이호성 박사 (한국표준과학연구원) and etc.  Fall 2019: Physics Colloquium
34 2012/04/02, 4PM  E6, 1501  Yong Hee Jeong  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
33 Feb.15(Mon), 05:00PM  Zoom  Yoshichika Otani(Tokyo Univ.)  Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file
32 Jun. 14 (Tue) 4PM  Seminar Room (#2502, 2nd fl.)  Young-Sik Ra, Université Pierre et Marie Curie  Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction
31 2013/03/11-06/10  E6, 1501  강명수교수(KAIST) 외  Physics Colloquium : 2013 Spring
30 Oct. 10(Tue) 4PM  E6-2 #1323  김성웅 교수 (성균관대학교 에너지과학과)  Discovery of New 2D Materials with Diverse Physical Properties
» Nov. 12 (Thu.) 4:00 PM  E6-2 1323  김영덕 (Young Duck Kim) 교수  2020 가을학기 광학분야 특별세미나
28 2011/09/03-12/06  E6, 1501  김용균교수(한양대) 외  Physics Colloquium : 2011 Fall file
27 2015/09/07-12/01  E6, 1501  문은국 교수(KAIST) 외  Physics Colloquium : 2015 Fall file
26 2016/03/11-06/09  E6-2, 1501 외  박권(KAIS) 외  Physics Seminar Serises : 2016 Spring file
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22 2013/09/09-12/09  E6, 1501  박혁규교수(부산대) 외  Physics Colloquium : 2013 Fall
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