2020 가을학기 광학분야 특별세미나
2020.11.10 08:21
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: https://forms.gle/rZv77u2dsptVMZuy6 )
Online address (zoom): https://kaist.zoom.us/j/93997220310
Date: 4pm, 11/12
Abstract
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
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
348 | 5. 9(월),16:00 | E6, #1501 | 김창영교수 (서울대) | Searching for new electronic properties in correlated material flatland |
347 | 5. 23(월),16:00 | E6, #1501 | 김준성교수 (postech 물리학과) | Novel electronic transport in topological van der Waals magnets |
346 | 2011/09/03-12/06 | E6, 1501 | 김용균교수(한양대) 외 |
Physics Colloquium : 2011 Fall
![]() |
» | Nov. 12 (Thu.) 4:00 PM | E6-2 1323 | 김영덕 (Young Duck Kim) 교수 | 2020 가을학기 광학분야 특별세미나 |
344 | Oct. 10(Tue) 4PM | E6-2 #1323 | 김성웅 교수 (성균관대학교 에너지과학과) | Discovery of New 2D Materials with Diverse Physical Properties |
343 | 2. 28(월),16:00 | E6, #1501 | 김동규교수 (KAIST 물리학과) | Spin-based training of optical microscopes |
342 | 4pm, 10th May | E6 1323 | 권혁준 (Korea Institute for Advanced Study, KIAS) | (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics |
341 | 5. 30(월), 16:00 | E6, #1501 | 공수현교수 (고려대학교 물리학과) | Light manipulation using 2D layered semiconductors |
340 | 2013/03/11-06/10 | E6, 1501 | 강명수교수(KAIST) 외 | Physics Colloquium : 2013 Spring |
339 | Jan. 18(Tue), 2pm-3pm | KI bldg. 5th fl. Room B501 & Zoom | YoungJu Jo (Stanford University) |
Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo
![]() |
338 | 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 |
337 | Feb.15(Mon), 05:00PM | Zoom | Yoshichika Otani(Tokyo Univ.) |
Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets
![]() |
336 | 2012/04/02, 4PM | E6, 1501 | Yong Hee Jeong | A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4 |
335 | Dec.10(Thu), 01:55 PM | Zoom | Yin Wen (University of Tokyo) | Consistency of Boltzmann equation and light dark matter from inflaton decay |
334 | 2016/09/05-12/12 4PM | Natual Scien Bldg.(E6)m #1501 | Yeong Kwan Kim 외 |
Physics Colloquium : 2016 Fall
![]() |
333 | Jan.28(Thu), 03:00PM | Zoom | Yaroslav Tserkovnyak (UCLA) |
Topological Transport of Deconfined Hedgehogs in Magnets
![]() |
332 | DEC. 26 (Wed), 04:00 PM | E6-1. 3rd fl. #3434 | Y. Kim, A. Go, K. Hwang and E.-G. Moon |
Informal Workshop on Topology and Correlation
![]() |
331 | Jun 22(Tue) 17:00 | Zoom webinar | Wei Han (Peking University, China) |
Spintronics meets Quantum Materials
![]() |
330 | Jun 8 (Tue), 10:00 AM | Zoom webinar | Toshihiko Baba (Yokohama National University, Japan) |
Photonic crystal devices for sensing
![]() |
329 | Sep. 14(Mon) 17:30~ | Zoom webinar | Teruo Ono (Kyoto U. Japan) |
KAIST Global Forum for Spin and Beyond (Third Forum)
![]() |