visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-11-1 10:30 
연사  
장소 #1323(E6-2 1st fl.) 

Time scale dependent dynamics in InAs/InP quantum dot gain media

 

Dr. Gadi Eisenstein, Technion

Nov. 1st (Tue), 10:30AM ,#1323(E6-2 1st fl.)

Recent advances in the density and uniformity of InAs / InP QDs, emitting near 1550 nm, have led to vast improvements in QD laser performance in terms of the dynamical properties and the temperature stability. Record modulation bandwidths and operation up to 150 0C have been demonstrated in the past few months. The superb dynamic performance can be traced to the carrier and gain dynamics of devices made of this material. These dynamics are dictated by physical processes in three time scales. A few to ten ps represents the direct photon density variations during modulation. Gain nonlinearity is determined by carrier capture and escape to and from the QDs; processes that last a fraction of 1 ps to about 3 ps. The sub 200 fs time scale brings the system into the coherent quantum regime as this time is shorter than the room temperature coherence time at room temperature.
Modulation characteristics are characterized using standard high speed telecom techniques and are modeled by a spatially resolved complex simulation. The time scale around 1 ps is extracted from multi wavelength pump probe measurements and the ultrashort coherent phenomena are measured using X-FROG. The two fast time scales are modeled using the same comprehensive numerical model that solves the Maxwell-Schrödinger equations by an FDTD code.

 

Contact: Yoonsoo Kim, Administrative Office (T.2599)

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)
585 2025-03-24 16:00  전응진 박사 (KIAS)  After the Higgs discovery file
584 2017-12-13 13:30    KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
583 2019-05-21 16:00    Classification of flat bands according to the band-crossing singularity of Bloch wave functions file
582 2019-09-02 16:00    Fall 2019: Physics Colloquium file
581 2023-05-26 11:00    (응집물리 세미나)Spectral Analyses of Stochastic Charge Trapping in Oxide Heterostructures file
580 2023-05-19 11:00    (응집물리 세미나)Dipole condensations in Tilted Bose-Hubbard Chains
579 2015-10-14 18:00    인터스텔라 영화 속의 물리 file
578 2022-03-28 16:00    Ultimate-density atomic semiconductor via flat bands
577 2009-09-07 16:00    Physics Colloquium : 2009 Fall file
576 2018-11-08 16:00    Conformality lost file
575 2017-03-06 16:00    Spring 2017: Physics Colloquium file
574 2014-05-28 17:00    부품소재산업이 미래다
573 2022-11-25 11:00    [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations file
572 2022-03-21 16:00    Multi-wavelength Studies on Relativistic Jets from Gamma-ray Bright Active Galactic Nuclei
571 2023-03-16 16:00    (광학분야 세미나) Investigation of 3D cell mechanics using refractive-index tomography
570 2024-10-17 16:00    Photonic Methods for Quantum Levitodynamics Beyond the Rayleigh Regime
569 2018-08-01 11:00    Future of AI: Is the brain a computer? file
568 2022-09-23 11:00    [Update 세미나 영상] (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions file
567 2020-09-11 14:00    SRC Seminar file
566 2025-04-03 16:00  윤홍 박사 (Corning Technology Center Korea)  Introduction of Corning Glass Innovation file