visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-04-28 16:00 
일시 4pm, 28th April 
장소 E6 1323 
연사 유경식 (KAIST 전기및전자공학부) 
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 장소 제목
174 2018-11-22 15:00  E6 Room(#1323)  Experimental and Computational Study on Physical Properties based on Granular System file
173 2019-08-06 16:00  E6 Room(#1323)  Visualization of in-plane piezoresponse vector fields file
172 2019-08-16 14:00  E6 Room(#1323)  Multiferroic and Magnetoelectric Effects by Tailoring Interfacial Chemistry and Physics in Correlated Oxides file
171 2019-05-08 16:00  E6 Room(#1323)  Imaging valley dependent electron transport in 2D semiconductors file
170 2019-08-01 14:00  E6 Room(#1323)  Low-density Superconductivity in SrTiO3 Probed by Planar Tunneling Spectroscopy file
169 2023-02-28 11:00  E6 Room(#1322)  Topotactic redox engineering toward novel material file
168 2022-06-23 11:00  E6 Room(#1322)  JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model file
167 2022-05-10 16:00  E6 1323  (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
» 2022-04-28 16:00  E6 1323  (광학분야 특별세미나)Adiabaticity and symmetry in optical waveguide design
165 2022-05-26 16:00  E6 1323  (광학분야 특별세미나)Topological photonic devices
164 2022-04-14 16:00  E6 1323  (광학분야 특별세미나)Holographic tomography of dielectric tensors at optical frequency
163 2024-08-16 11:00  E6 1322 (no zoom broadcasting)  Cathodoluminescence for nanophotonics: Applications to plasmonic bandgap materials and perovskite semiconductors file
162 2022-10-04 16:00  E6 #2501  Distinguishing 6d (1, 0) SCFTs
161 2022-03-29 10:00  E6 #1501/zoom, E6 #2502/zoom  Non-reciprocal phase transitions file
160 2022-03-31 10:00  E6 #1501/zoom  Weiss fields for Quantum Spin Dynamics file
159 2022-01-25 15:00  E6 #1501/online  Emulating twisted double bilayer graphene with a multiorbital optical lattice file
158 2022-10-24 16:00  E6 #1501(공동강의실)  Physics Colloquim(Fall 2022) file
157 2022-08-01 10:00  E6 #1501 & Zoom  [Update 세미나 영상] James Webb Space Telescope & OTE Commissioning
156 2022-07-14 14:15  E6 #1501 & Zoom  Hund and electronic correlations in ruthenium-based systems
155 2022-07-14 15:00  E6 #1501 & Zoom  Pure two-dimensional quantum electron liquid and its phase transition