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
댓글 0
번호 | 날짜 | 장소 | 제목 |
---|---|---|---|
544 | 2021-02-15 17:00 | Zoom | Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets |
543 | 2020-12-09 10:00 | Zoom | Searching for the QCD axion with the ARIADNE experiment |
542 | 2017-04-27 16:00 | Seminar Room(#1323, E6-2) | 반도체 양자점을 이용한 단광자 광원 |
541 | 2017-03-06 16:00 | Seminar Room 1501 | Spring 2017: Physics Colloquium |
540 | 2019-09-02 16:00 | Seminar Room 1501 | Fall 2019: Physics Colloquium |
539 | 2017-03-21 16:00 | Seminar Room 1323 | Spring 2017: Physics Seminar Serises |
538 | 2018-07-02 15:00 | Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus | High Precision Magnetic Field Measurement for the Muon g-2 Experiment |
537 | 2017-12-14 15:00 | Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus | Exploring the Universe via GWs in the era of multi-messenger astronomy |
536 | 2016-06-14 16:00 | Seminar Room (#2502, 2nd fl.) | Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction |
535 | 2016-11-01 14:30 | Seminar Room #1323(E6-2) | Search for dark sector particles in the B-factory experiments |
534 | 2019-09-18 16:00 | Seminar Room #1323 | Fall 2019: Physics Seminar Serises |
533 | 2018-07-27 15:00 | Room 5318, KAIST Natural Sciences Lecture Hall(E6). | Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima |
532 | 2018-07-27 15:00 | Room 5318, KAIST Natural Sciences Lecture Hall(E6). | Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima |
531 | 2018-07-26 14:00 | Room 5318, KAIST Natural Sciences Lecture Hall(E6). | Inflation in String Theory and Backreaction |
530 | 2018-07-26 14:00 | Room 5318, KAIST Natural Sciences Lecture Hall(E6). | Inflation in String Theory and Backreaction |
529 | 2018-07-13 14:00 | Room 5318, KAIST Natural Sciences Lecture Hall(E6). | Loop Induced Single Top Partner Production and Decay at the LHC |
528 | 2018-07-12 17:00 | Room 5318, KAIST Natural Sciences Lecture Hall(E6) | The MilliQan Experiment: Search for Milli-Charged Particles at the LHC |
527 | 2023-04-04 16:00 | Room 2501, KAIST Natural Sciences Lecture Hall(E6) | Chiral Magnetism: A Geometric Perspective |
526 | 2023-02-20 16:00 | Room 1323, KAIST Natural Sciences Lecture Hall(E6) | Physics of ferromagnet/superconductor junctions |
525 | 2015-06-03 12:00 | Room 101, E11 | The First Wednesday Multidisciplinary Forum |