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)
545 2015-09-15 16:00    Physics Colloquium : 2014 Fall file
544 2022-03-14 16:00    Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
543 2023-04-27 16:00    (광학분야 세미나)On-chip spectrometers based on CMOS image sensors
542 2021-05-27 16:00    찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
541 2016-03-11 13:30    Physics Seminar Serises : 2016 Spring file
540 2022-11-03 16:00    (광학분야 세미나) Single-photon emission from low-dimensional materials
539 2015-09-07 16:00    Physics Colloquium : 2015 Fall file
538 2025-03-28 11:00  명노준 교수 (조선대)  Quantum Transport in Strained-Engineered Graphene: Mesoscopic Perspective of Tunable Quantum Information Devices file
537 2025-05-15 16:00  노찬 박사(KAIST)  Generation of multimode Gaussian quantum states and their applications for quantum computing file
536 2022-04-11 16:00    Emergence of Statistical Mechanics in Quantum Systems
535 2022-04-04- 16:00    New paradigms in Quantum Field Theory
534 2022-05-09 16:00    Searching for new electronic properties in correlated material flatland
533 2022-05-23 16:00    Novel electronic transport in topological van der Waals magnets
532 2011-09-03 16:00    Physics Colloquium : 2011 Fall file
531 2022-10-13 16:00    (광학분야 세미나) Ultrafast Optics for Ultra-Precision Metrology and Realization of Flexible/Stretchable Laser-Induced-Graphene Electronics
530 2020-11-12 16:00    2020 가을학기 광학분야 특별세미나
529 2022-10-07 11:00    [Update 세미나 영상] (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer file
528 2022-10-28 11:00    [Update 세미나영상] (응집물리 세미나) Machine-Learning-Guided Prediction models and Materials discovery for high Tc cuprates file
527 2017-10-10 16:00    Discovery of New 2D Materials with Diverse Physical Properties
526 2023-04-06 16:00    (광학분야 세미나)Nanophotonics-based approaches to explore Berry physics