visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-05-26 16:00 
일시 4pm, 26th May 
장소 E6 1323 
연사 황민수 (Department of Physics, Korea University) 
* 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 장소 제목
562 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
561 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
560 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
559 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
558 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
557 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
556 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
555 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
554 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
553 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
552 2013-03-11 16:00  E6, 1501  Physics Colloquium : 2013 Spring
551 2013-09-09 16:00  E6, 1501  Physics Colloquium : 2013 Fall
550 2014-03-10 16:00  E6, 1501  Physics Colloquium : 2014 Spring file
549 2014-05-28 17:00  KI Building, Matrix Hall  부품소재산업이 미래다
548 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
547 2015-03-04 12:00  1323호, E6-2  Bioimaging and Biosensing Using Near-Infrared Fluorescence file
546 2015-03-09 16:00  E6, 1501  Physics Colloquium : 2015 Spring file
545 2015-03-13 14:00  Connect Room, KI Bldg.  The 15th Innovative Workshop on Soft/Bio Materials file
544 2015-06-03 12:00  Room 101, E11  The First Wednesday Multidisciplinary Forum file
543 2015-07-15 14:00  E6-2,1323  Electronic and optical properties of titanate-based oxide superlattices