visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2018-05-31 16:00 
일시 May 311 (Thu.), 04:00 PM 
장소 #1323, E6-2 
연사 Prof. Teun-Teun Kim 

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 장소 제목
465 2022-10-13 16:00  E6-2 #1323  (광학분야 세미나) Ultrafast Optics for Ultra-Precision Metrology and Realization of Flexible/Stretchable Laser-Induced-Graphene Electronics
464 2020-11-12 16:00  E6-2 1323  2020 가을학기 광학분야 특별세미나
463 2022-10-07 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer file
462 2022-10-28 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Machine-Learning-Guided Prediction models and Materials discovery for high Tc cuprates file
461 2017-10-10 16:00  E6-2 #1323  Discovery of New 2D Materials with Diverse Physical Properties
460 2023-04-06 16:00  E6-2 #1323  (광학분야 세미나)Nanophotonics-based approaches to explore Berry physics
459 2022-11-17 16:00  E6-2 #1323  (광학분야 세미나) Ultrastructural and Spectroscopic Studies by Super-Resolution Fluorescence Microscopy
458 2022-09-22 16:00  E6-2 #1323  (광학분야 세미나) Quasi-particle-like optical vortices in magnetic materials
457 2022-02-28 16:00  E6, #1501  Spin-based training of optical microscopes
456 2022-12-09 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) Single-shot measurements of strongly-correlated artificial molecular levels in semiconductor quantum dots file
455 2023-03-24 11:00  E6-2 #1323  (응집물리 세미나)Floquet simulators of topological surface states in isolation
454 2023-05-18 16:00  E6-2 #1323  (광학분야 세미나)Dielectric metasurfaces for optimized optical system and spatial light modulators
453 2022-05-10 16:00  E6 1323  (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
452 2022-05-30 16:00  E6, #1501  Light manipulation using 2D layered semiconductors
451 2022-09-29 16:00  E6-2 #1323  (광학분야 세미나) Ultrafast THz Field-Induced Nonlinear Optics
450 2013-03-11 16:00  E6, 1501  Physics Colloquium : 2013 Spring
449 2023-05-31 16:00  E6-2, #2502  [High-Energy Theory Seminar] Resurgence and complex Chern-Simons theory
448 2022-01-18 14:00  KI bldg. 5th fl. Room B501 & Zoom  Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo file
447 2016-06-14 16:00  Seminar Room (#2502, 2nd fl.)  Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction
446 2023-05-17 14:00  E6 #1323  Optical Response in the multilayer thin films