visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-11-1 10:30 
일시 Nov. 1st (Tue), 10:30AM 
장소 #1323(E6-2 1st fl.) 
연사 Dr. Gadi Eisenstein, Technion 

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 장소 제목
448 2016-10-27 16:00  #1323(E6-2)  Terahertz Metal Optics
447 2016-11-01 14:30  Seminar Room #1323(E6-2)  Search for dark sector particles in the B-factory experiments
446 2016-11-04 13:30  E6-2. #1323(1st fl.)  Exotic phenomena at oxide LaAlO3/SrTiO3 hetero-interface and their applications
445 2016-11-04 15:00  E6-2. #1323(1st fl.)  Quantum information experiments using few electron spins in semiconductors
» 2016-11-1 10:30  #1323(E6-2 1st fl.)  Time scale dependent dynamics in InAs/InP quantum dot gain media
443 2016-11-10 16:00  E6-2. #1323(1st fl.)  Low Dimensional Active Plasmonics and Electron Optics in Graphene
442 2016-11-11 13:30  #1323(E6-2. 1st fl.)  Bandgap Engineering of Black Phosphorus
441 2016-11-11 16:00  #1323(E6-2. 1st fl.)  Dirac fermions in condensed matters
440 2016-11-16 16:00  #1323(E6-2. 1st fl.)  Realizing Haldane Model in Fe-based Honeycomb Ferromagnetic Insulators
439 2016-11-18 10:30  #5318(5th fl.)  Non-equilibrium many-body spin dynamics in diamond
438 2016-11-24 16:00  #1323(E6-2. 1st fl.)  Harmonic oscillator physics with single atoms in a state-selective optical potential
437 2016-11-29 16:00  #1323(E6-2. 1st fl.)  Symmetry Protected Kondo Metals and Their Phase Transitions
436 2016-12-09 13:30  #1323(E6-2. 1st fl.)  Entanglement area law in strongly-correlated systems
435 2016-12-09 16:00  #1323(E6-2. 1st fl.  Shift Charge and Spin Photocurrents in Dirac Surface States of Topological Insulator
434 2016-12-12 13:30  1:30p.m. #1323(E6-2. 1st fl.)  “Possible symmetry in the phase diagrams of electron- & hole-doped cuprate high-Tc superconductors”
433 2016-12-8 16:00  #1323(E6-2. 1st fl.)  Dynamical Resonance between Two Optical Cavities via Optomechanical Oscillator
432 2017-01-09 16:00  Lecture Hall, College of Natural Sciences [#1501,E6-2]  Topological Defects and Phase Transitions" file
431 2017-02-01 14:00  #1323(E6-2. 1st fl.)  Quantum electron optics using flying electrons
430 2017-03-02 16:00  #1323(E6-2. 1st fl.)  “Progress in the comparison of ARPES to DMFT for d and f strongly correlated electron systems”
429 2017-03-06 16:00  Seminar Room 1501  Spring 2017: Physics Colloquium file