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)
435 2018-10-04 16:00    Engineering light absorption in an ultrathin semiconductor metafilm file
434 2018-10-11 16:00    Dirac electrons in a graphene quasicrystal file
433 2018-10-12 14:30    Quantum Advantage in Learning Parity with Noise file
432 2018-10-12 16:00    Direct observation of a two-dimensional hole gas at oxide interfaces file
431 2018-10-15 16:00    Universal properties of macroscopic current-carrying systems file
430 2018-10-16 10:00    Capturing protein cluster dynamics and gene expression output in live cells file
429 2018-10-18 10:00    Understanding membrane protein folding using single-molecule force techniques file
428 2018-10-18 16:00    Applications of nonlinear optics for condensed matter researches file
427 2018-10-19 10:00    Energy conversion processes during magnetic reconnection in a laboratory plasma file
426 2018-10-24 10:30    Photonic integration of next-generation clocks and Hertz-absolute-accuarcy optical frequenncy synthesizers file
425 2018-10-25 16:00    Abelian and non-Abelian dark photons file
424 2018-10-26 16:00    Coexisting triple-point and nodal-line topological magnons and thermal Hall effect in pyrochlore iridates file
423 2018-11-01 16:00    Direct holography from a single snapshot file
422 2018-11-08 16:00    Conformality lost file
421 2018-11-09 14:30    Moiré superlattices – from twisted bilayer graphene to quasicrystal file
420 2018-11-09 16:00    Quantum sensing and imaging with diamond defect centers for nano-scale spin physics file
419 2018-11-21 15:00    Engineering topological quantum physics at the atomic scale file
418 2018-11-22 15:00    Experimental and Computational Study on Physical Properties based on Granular System file
417 2018-11-23 15:00    Entanglement string and Spin Liquid with Holographic duality file
416 2018-11-29 16:00    양자 칸델라 실현을 위한 단일 광자 발생장치 개발 file