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)
525 2022-11-17 16:00    (광학분야 세미나) Ultrastructural and Spectroscopic Studies by Super-Resolution Fluorescence Microscopy
524 2022-09-22 16:00    (광학분야 세미나) Quasi-particle-like optical vortices in magnetic materials
523 2022-02-28 16:00    Spin-based training of optical microscopes
522 2022-12-09 11:00    [Update 세미나영상](응집물리 세미나) Single-shot measurements of strongly-correlated artificial molecular levels in semiconductor quantum dots file
521 2025-02-27 16:00  김도헌 교수(서울대)  Toward reliably coherent spin qubits in silicon file
520 2025-03-27 16:00  김건우 교수 (중앙대)  Quantum dynamics in synthetic spaces file
519 2023-03-24 11:00    (응집물리 세미나)Floquet simulators of topological surface states in isolation
518 2023-05-18 16:00    (광학분야 세미나)Dielectric metasurfaces for optimized optical system and spatial light modulators
517 2022-05-10 16:00    (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
516 2022-05-30 16:00    Light manipulation using 2D layered semiconductors
515 2025-03-13 16:00  고희동 교수(서울대)  분산관계 기반 파동 제어 구조물 설계 file
514 2022-09-29 16:00    (광학분야 세미나) Ultrafast THz Field-Induced Nonlinear Optics
513 2013-03-11 16:00    Physics Colloquium : 2013 Spring
512 2025-03-17 16:00  강동민 교수 (서울대)  String Theory, Quantum Field Theory and Physical Mathematics file
511 2023-05-31 16:00    [High-Energy Theory Seminar] Resurgence and complex Chern-Simons theory
510 2022-01-18 14:00    Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo file
509 2024-10-02 12:00    Data-driven discovery of neural computations through brain-wide and cell-type-specific dynamical systems file
508 2016-06-14 16:00    Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction
507 2023-05-17 14:00    Optical Response in the multilayer thin films
506 2021-02-15 17:00    Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file