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
331 2021-06-11 14:30  Online seminar  Engineering sound waves and vibrations in multi-mode nanomechanical systems file
330 2021-06-08 10:00  Zoom webinar  Photonic crystal devices for sensing file
329 2021-05-27 16:00  온라인  찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
328 2021-05-17 17:00  Zoom webinar  Spin current generation and detection in uniaxial antiferromagnets file
327 2021-05-14 16:00  Online seminar  Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
326 2021-05-14 14:30  Online seminar  Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file
325 2021-04-19 19:00  Zoom webinar  Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
324 2021-04-09 10:00  Zoom webinar  Integrated Lithium Niobate Photonics file
323 2021-04-02 16:00  Online(Zoom)  Van der Waals heterostructures for orbital gating-based phototransistors and electronic spectroscopy
322 2021-04-02 14:30  Online(Zoom)  Quantum computing and entanglement generation using trapped ions and photons
321 2021-03-25 16:00  Online Seminar (Zoom)  Search for dark matter axion with Rydberg atoms file
320 2021-03-02 16:00  Online  Sensitive terahertz detection with graphene-based transistors file
319 2021-02-17 09:00  Online  석학 대중 강연 및 강의 시리즈 file
318 2021-02-15 17:00  Zoom  Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file
317 2021-02-02 14:30  Zoom  Quantum- & Nano-Photonics 세미나(Integrated Nanophotonics with Metamaterials, Microcomb, and Atomic Systems) file
316 2021-01-28 18:00  Online Seminar  Quantum metamaterials: concept, theory, prototypes and possible applications file
315 2021-01-28 15:00  Zoom  Topological Transport of Deconfined Hedgehogs in Magnets file
314 2020-12-23 10:00  Online  Online workshop for Quantitative Phase Imaging file
313 2020-12-11 16:00  online  Atomic and electronic reconstruction at van der Waals interface in twisted 2D materials
312 2020-12-11 14:30  online  Antisymmetric interlayer exchange coupling in magnetic multilayers