visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-05-26 16:00 
연사  
장소 E6 1323 
* Title: Topological photonic devices
 
* Speaker: 황민수 (Department of Physics, Korea University)
 
* Date: 4pm, 26th May
 
* Place: E6 1323 (Available seats can be limited because of the COVID situation.)
 
* Abstract
Nanophotonics deals with a control of light at the nanoscale being closely connected with the rapid advances. Properly engineered nanostructures allow the subwavelength propagation of light and its strong confinement in nanowaveguides and nanocavities, making possible the field enhancement and lasing. Recent developments in the physics of photonic topological insulators (PTIs) and bound states in the continuum (BICs) allowed to advance the field of nanophotonics and introduce novel all-dielectric nanostructures and nanolasers empowered by topology and interference effects. Optical BICs have provided a useful way to suppress out-of-plane losses and enhance quality factor (Q factor) in an infinite periodic structure, as a result of destructive mode inference in the far field. The intrinsic topological nature of BICs enables strong optical responses or low-power operation to be achieved. Exploiting long-lived, spatially-confined BICs has emerged from the numerous approaches considered as a promising route to boost nanophotonic Q factors. Moreover, in photonic systems, light propagation without backscattering and defect/imperfection-immune operation has been pursued to develop an ideal light source. Such distinctive features are considered particularly important in nanophotonic devices that are sensitive to small perturbations. After a new branch of optics, called “photonic topological insulators”, appeared and grew rapidly, controlling the topological phases of photonic structures has emerged as a novel manipulation of light. Here, the operational mechanisms, optical characterizations, and practical applications of photonic crystals based on BICs and PTIs are outlined. Their scientific and engineering challenges and results are also discussed.
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)
185 2017-08-16 16:00    Phonon-driven spin-Floquet valleytro-magnetism file
184 2024-07-22 14:00    Nonthermal electronic orders in photo-doped Mott insulators
183 2019-10-15 16:00    Moiré superlattices and graphene quasicrystal file
182 2023-05-15 16:00    Role of dark Higgs boson in DM physics and cosmology file
181 2020-11-17 12:00    Quantum- & Nano-Photonics" 세미나 시리즈 file
180 2020-12-02 10:00    Recent progress in Axion Dark Matter eXperiment (ADMX) technology file
179 2016-04-18 15:30    First Principles Approaches for Intermolecular Interactions: From Gas-Phase Dimers to Liquid Water and Molecular Crystal Polymorphism file
178 2018-06-22 10:00    Success in Research Career file
177 2018-11-23 15:00    Entanglement string and Spin Liquid with Holographic duality file
176 2021-02-02 14:30    Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file
175 2019-10-29 10:00    Unconventional Spin Transport in Quantum Materials file
174 2022-04-08 11:00    (응집물리 세미나) Flat-surface-assisted physical phenomena occurring in single crystal metal thin film file
173 2018-11-21 15:00    Engineering topological quantum physics at the atomic scale file
172 2016-06-14 15:00    No-Insulation High Temperature Superconductor Magnet Technology for Compact, Reliable, and Low-Cost High Field DC Magnets
171 2019-12-18 16:00    Road to Higher Tc Superconductivity file
170 2019-07-16 16:00    2019 Physics Distinguished Lecture file
169 2019-07-10 16:00    Public Lectures file
168 2018-10-04 16:00    Engineering light absorption in an ultrathin semiconductor metafilm file
167 2019-12-05 16:00    Subwavelenth Photonic Devices: From Single Photon Sources to Solar Cell file
166 2023-06-16 13:00    Quantum critical states under extreme conditions