visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2018-05-31 16:00 
연사  
장소 #1323, E6-2 

Physics Seminar Series

 

 

Dynamic control of optical properties with gated-graphene metamaterials

 

Prof. Teun-Teun Kim

 

Center for Integrated Nanostructure Physics (CINAP)

Institute for Basic Science (IBS)

Sungkyunkwan University (SKKU)

 

May 311 (Thu.), 04:00 PM

#1323, E6-2

 

Abstract:

In this talk, I will present recent my research results with different design of artificial media, called metamaterials which consist of the arrangement of periodic subwavelength optical elements that exhibit unusual optical properties beyond what natural materials can offer. I will show the gate-induced switching and linear modulation of terahertz waves can be achieved in a hybrid material system consisting of artificially constructed meta-atoms and an atomically thin graphene layer [1]. It has been experimentally demonstrated that by integrating graphene with metamaterials, significant transmission amplitude modulation of up to 50% with high modulation speed of about 80ns was achieved with gated graphene metamaterials. Based this approach, I will introduce electrically controllable unique optical properties such as optical activity [2], anomalous refraction, and focusing [3], and analogue of electromagnetically induced transparency (EIT) [4] by integrating 2D graphene layer onto metamaterials with different functional unit cells. The switching and linear modulation of unique optical properties are realized by changing coupling among meta-atoms or electrical conductivity of metallic structures caused by increased sheet conductivity of the single layer graphene. Benefitting from the electrically controllable unique optical properties, the proposed graphene based meta-devices are expected to provide a myriad of important applications such as active polarization controllers, active slow light devices, ultrasensitive sensors and nonlinear devices. 

Reference 

[1] S. H. Lee, et al, Nature Materials 11,936-641 (2012)

[2] T. -T. Kim, et al, Science Advances 3, e1701377 (2017)

[2] T. -T. Kim, et al, Advanced Optical Materials 6(1)1700507, (2018)

[3] T. -T. Kim, et al, ACS Photonics, 5(5), 1800-1807(2018).

 

 

Department of Physics, KAIST

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
294 2021-03-25 16:00    Search for dark matter axion with Rydberg atoms file
293 2021-04-02 14:30    Quantum computing and entanglement generation using trapped ions and photons
292 2021-04-02 16:00    Van der Waals heterostructures for orbital gating-based phototransistors and electronic spectroscopy
291 2021-04-09 10:00    Integrated Lithium Niobate Photonics file
290 2021-04-19 19:00    Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
289 2021-05-14 14:30    Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file
288 2021-05-14 16:00    Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
287 2021-05-17 17:00    Spin current generation and detection in uniaxial antiferromagnets file
286 2021-05-27 16:00    찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
285 2021-06-08 10:00    Photonic crystal devices for sensing file
284 2021-06-11 14:30    Engineering sound waves and vibrations in multi-mode nanomechanical systems file
283 2021-06-11 16:00    Pseudogap in surface-doped black phosphorus file
282 2021-06-22 17:00    Spintronics meets Quantum Materials file
281 2021-07-29 14:00    Gravitationally Induced Dark Sector and Inflationary Dynamics file
280 2021-11-02 16:00    Metrology of Band Topology via Resonant Inelastic X-ray Scattering file
279 2021-12-03 14:30    Topological Spin Textures: Skyrmions and Beyond file
278 2021-12-03 16:00    Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer file
277 2022-01-11 15:00    Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I file
276 2022-01-12 11:00    Spectroscopic study of trapped ions towards probing dark matter and new physics file
275 2022-01-17 14:00    Five Lectures on Observational Probes of Dark Energy file