visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-04-28 16:00 
연사  
장소 E6 1323 
Title:  Adiabaticity and symmetry in optical waveguide design
 
Speaker: 유경식 (KAIST 전기및전자공학부)
 
Date: 4pm, 28th April
 
Place: E6 1323 (Available seats can be limited because of the COVID situation.)
 
Abstract
'Adiabaticity' and 'shortcuts to adiabaticity' are important concepts in many aspects of modern physics. In this talk, we discuss two specific examples of optical waveguide designs that involve adiabatic photonic state evolutions with potential applications in photonic integrated circuits. The first example is highly-efficient broadband adiabatic mode transformation between single-mode optical fibers and integrated silicon waveguides. Based on adiabatic mode transformation through tapered optical waveguides, we show that high-efficiency optical energy transfer between dissimilar waveguides can be achieved for building  seamless interfaces between heterogeneous photonic systems. The second example is strong time-asymmetric optical transmission near an exceptional point involving non-adiabatic state jumps. Using the conventional photonic integrated circuits platform, we experimentally verify that time-asymmetric responses can be obtained in a non-Hermitian dynamic system without encircling an exceptional point by carefully controlling evolution dynamics.
 
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)
354 2022-04-01 16:00    High-field Electron Transport and Interaction Induced Phenomena in 2D Materials file
353 2022-03-31 16:00    (광학분야 특별세미나)Ultrafast time-resolved spectroscopy in topological materials
352 2022-03-31 10:00    Weiss fields for Quantum Spin Dynamics file
351 2022-03-29 10:00    Non-reciprocal phase transitions file
350 2022-03-28 16:00    Ultimate-density atomic semiconductor via flat bands
349 2022-03-25 11:00    (응집물리 세미나) Hund's metallicity in ruthenate systems file
348 2022-03-21 16:00    Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
347 2022-03-18 11:00    (응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids file
346 2022-03-14 16:00    Quantitative phase imaging and artificial intelligence: label-free 3D imaging, classification, and inference
345 2022-03-07 16:00    Climate Physics and Modelling(우리말강의)
344 2022-02-28 16:00    Spin-based training of optical microscopes
343 2022-01-26 13:00    An Introduction to Cohomology groups file
342 2022-01-25 15:00    Emulating twisted double bilayer graphene with a multiorbital optical lattice file
341 2022-01-18 14:00    Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo file
340 2022-01-17 14:00    Five Lectures on Observational Probes of Dark Energy file
339 2022-01-12 11:00    Spectroscopic study of trapped ions towards probing dark matter and new physics file
338 2022-01-11 15:00    Ultrafast optical studies on CDW collective modes of the Weyl-CDW (TaSe4)2I file
337 2021-12-03 16:00    Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer file
336 2021-12-03 14:30    Topological Spin Textures: Skyrmions and Beyond file
335 2021-11-02 16:00    Metrology of Band Topology via Resonant Inelastic X-ray Scattering file