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)
345 2018-03-16 16:00    Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
344 2018-03-16 16:00    Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
343 2015-11-06 16:30    Topological Dirac line nodes in centrosymmetric semimetals
342 2019-04-19 14:30    A family of finite-temperature electronic phase transitions in graphene multilayers file
341 2019-11-01 14:30    Squeezing the best out of 2D materials file
340 2017-09-26 11:00    Time-resolved ARPES study of Dirac and topological materials
339 2016-04-08 13:30    Theoretical Overview of Iron-based superconductors and its future
338 2019-06-28 13:30    Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures file
337 2016-10-27 16:00    Terahertz Metal Optics
336 2016-11-18 10:30    Non-equilibrium many-body spin dynamics in diamond
335 2022-09-15 13:00    AdS black holes: a review
334 2022-05-18 16:00    Geometry, Algebra, and Quantum Field Theory
333 2022-05-19 16:00    Chasing Long Standing Neutrino Anomalies with MicroBooNE
332 2022-05-12 16:00    New frontiers of electroweak physics at the LHC
331 2024-01-16 16:00    [High Energy Theory Seminar] Towards quantum black hole microstates
330 2024-10-21 13:00    [Physics Seminar] “Non-Hermitian Point-Gap Topology in Junction Systems” file
329 2024-10-14 11:00    [RSVP, Oct 14th Mon] Ambassador of Hungary to Republic of Korea Special Lecture file
328 2019-12-27 15:00    The superconducting order parameter puzzle of Sr2RuO4 file
327 2019-12-27 15:00    The superconducting order parameter puzzle of Sr2RuO4 file
326 2019-09-26 16:00    Entanglement Swapping with Autonomous Polarization-Entangled Photon-Pairs from Warm Atomic Ensemble file