visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나

2020 가을학기 광학분야 특별세미나

2020.11.10 08:21

admin 조회 수:1625

날짜 2020-11-12 16:00 
일시 Nov. 12 (Thu.) 4:00 PM 
장소 E6-2 1323 
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

번호 날짜 장소 제목
311 2020-12-10 13:55  Zoom  Consistency of Boltzmann equation and light dark matter from inflaton decay
310 2020-12-09 10:00  Zoom  Searching for the QCD axion with the ARIADNE experiment file
309 2020-12-02 10:00  Zoom  Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
308 2020-11-26 16:00  Online(Zoom)  2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
307 2020-11-20 16:00  Online  Coherent control of field gradient induced quantum dot spin qubits
306 2020-11-20 14:30  Online  Lumpy Cooper pairs in an iron-based superconductor
305 2020-11-17 12:00  Online(Zoom)  Quantum- & Nano-Photonics" 세미나 시리즈 file
» 2020-11-12 16:00  E6-2 1323  2020 가을학기 광학분야 특별세미나
303 2020-10-23 14:00  E6-2 #1323  Plasmon spectroscopy of low-dimensional superconductors in fluctuating regime file
302 2020-10-16 16:00  https://kaist.zoom.us/j/89198078609  Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern file
301 2020-10-16 14:30  https://kaist.zoom.us/j/89198078609  Nanoscale magnetic resonance detection towards nano MRI file
300 2020-10-15 17:00  https://bit.ly/3ndIiJn  Time crystals, quasicrystals, and time crystal dynamics in the superfluid universe file
299 2020-10-15 16:00  CAPP Seminar Room #C303, Creation Hall (3F), KAIST Munji Campus  Graphene-based Josephson junction microwave bolometer file
298 2020-10-15 16:00  (https://kaist.zoom.us/j/93997220310)  Towards resource-efficient and fault-tolerant quantum computation with nonclassical light
297 2020-10-09 09:00  https://kaist.zoom.us/j/85161896513?pwd=U3pwWFFZaWVRamxDZUR5REhNeVk0UT09  Quantum Many-Body Simulation file
296 2020-09-28 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond(Fourth Forum) file
295 2020-09-24 09:00  Zoom Video  (CAPP/IBS)Searching for Dark Matter with a Superconducting Qubit , Cryogenic Microwave Circuit Development at the NSTU file
294 2020-09-22 09:30  Zoom webinar  Physics and applications of soliton microcombs(Quantum- & Nano-Photonics) file
293 2020-09-14 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond (Third Forum) file
292 2020-09-11 14:00  zoom  SRC Seminar file