korean english


Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다


아 래


제목: Graphene plasmon and Plasmonics


연사: 황  의  헌 교수님 (성균나노과학기술원, 물리학과) 


일시: 2013년 11월 6일(수) 오후4:30


장소: 제1과학관 31214  e+첨단강의실 


초록: From the dynamical dielectric function of two-dimensional grapheme, which is calculated within the self-consistent-field approximation, we present the long-wavelength plasma oscillation (plasmon) in graphene layers, interacting via the long-range Coulomb interaction. Even though the plasmon in graphene has many desirable properties, including tunability via electrostatic gating and low loss, a combination of graphene layers effectively enhances the plasmonic resonance frequency and magnitude. We present the plasmon dispersion in multilayer graphene. The linear chiral gapless single-particle energy dispersion of graphene leads to plasmon properties with several unexpected experimentally observable characteristic features such as a nontrivial influence of an undoped layer on the multilayer plasmon dispersion and a strange influence from other layers even in the weak-coupling limit. Our predicted plasmon properties in multilayer graphene clearly distinguish graphene from the extensively studied usual parabolic 2D electron systems. We also present the collective excitations of coupled electron-phonon systems, taking into account the nonperturbative Coulomb coupling between electronic excitations in graphene and the substrate longitudinal-optical phonon modes. Our theoretical results provide the basis for the emerging and potentially far-reaching field of graphene plasmonics. The versatility of graphene means that graphene-based plasmonics may enable the manufacture of novel optical devices working in different frequency ranges, from terahertz to the visible, with extremely high speed, low driving voltage, low power consumption and compact sizes.

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1079608
327 2012학년도 2학기 콜로퀴움 일정 안내 2012.09.03 70746
326 <6/13> Efficient hybrid organic-inorganic light emitting diodes by surface modification of metal oxides 2012.06.01 79897
325 <5/30> Dark Energy 2012.05.23 71854
324 <5/23> 나노구조 산화물 재료의 기능성-용매화전자에서 전자화합물까지... 2012.05.17 165136
323 <5/16> 물리학자가 바라 본 단백질: 왜, 어떻게 연구하는가? 2012.05.10 270321
322 <5/9> Searching for 5th dimension 2012.05.03 73412
321 <5/2> Electrical Instability in Nanoscale Channel Devices: Top-down & Bottom-up Approaches 2012.04.19 84567
320 <4/18> 삼중항 여기자를 이용한 유기광전소자 연구 2012.04.05 164048
319 <4/4> Cooking up elements in the universe: Nuclear astrophysics with exotic ion beams 2012.03.29 84938
318 <3/28> 양자물리학의 성립 과정 2012.03.22 72917
317 <3/21> 우주가속팽창의 원인 규명 2012.03.15 90550
316 <3/14> 시공간 왜곡과 우주론(Spacetime warp and Cosmology) 2012.03.07 79068
315 2012학년도 1학기 콜로퀴움 일정 안내 [5] 2012.02.29 85312
314 <12/7> Optical Antennas 2011.11.30 88409
313 <11/30> 기능성 산화물의 현황과 응용 2011.11.24 80163
312 <11/23> How statistical physics contributes to Internet world: perspectives, methods and applications 2011.11.15 89326
311 <11/16> Study of carrier transport and charging effects in organic devices 2011.11.10 112492
310 <11/9> Bosons in high Tc superconductors: an experimental survey 2011.10.31 109861
309 <11/2> Color Science for Reflective mode Optical Shutter 2011.10.27 158424
308 <10/26> 빛으로 보는 세상 2011.10.17 79609