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)
305 2022-01-12 11:00    Spectroscopic study of trapped ions towards probing dark matter and new physics file
304 2019-09-10 15:00    (2+1) D Duality Web from 3D Euclidean Lattice file
303 2022-01-25 15:00    Emulating twisted double bilayer graphene with a multiorbital optical lattice file
302 2019-07-21 12:00    Challenges and Opportunities in Theoretical Particle Physics 2019 file
301 2024-03-13 16:00    [High-Energy Theory Seminar] The Schwarzschild Black Hole from Perturbation Theory to all Orders
300 2019-08-06 16:00    Visualization of in-plane piezoresponse vector fields file
299 2012-02-13 16:00    Physics Colloquium : 2012 Spring
298 2016-06-01 16:00    Laboratory experiments relevant to mesospheric clouds, Saturn’s rings & astrophysical jets
297 2023-03-22 16:00    (High Energy Theory Seminar) Boltzmann or Bogoliubov? A Case of Gravitational Particle Production
296 2019-07-03 15:00    Many-body quantum electrodynamis (QED) with atoms and photons: A new platform for quantum optics" file
295 2023-01-12 14:40    JILA 1D Wannier-Stark optical lattice clock file
294 2018-07-26 14:00    Inflation in String Theory and Backreaction file
293 2018-07-26 14:00    Inflation in String Theory and Backreaction file
292 2023-08-29 16:00    [High Energy Theory Seminar] Towards string loop corrections in Calabi-Yau orientifold compactifications.
291 2024-10-30 14:30    [Seminar Invitation] Mario Cuoco (CNR-SPIN, c/o University of Salerno, Fisciano, Italy) / 2024.10.30. 14:30 / E6-2, #3441
290 2020-08-17 20:00    Using magnetic tunnel junctions to compute like the brain file
289 2020-08-25 20:00    KAIST Global Forum for Spin and Beyond (Second Forum) file
288 2025-03-10 16:00  Marko Rancic (University of Luxembourg)  Quantum computing for physics and optimization problems file
287 2024-07-10 16:00    [High Energy Theory Seminar] The Weak Gravity Conjecture in Perturbative String Theory
286 2023-06-14 16:00    [High-Energy Theory Seminar]Vertex algebras and extended operators in 4d N=2 SCFTs