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)
235 2022-05-30 16:00    Light manipulation using 2D layered semiconductors
234 2022-06-03 09:30    (Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics file
233 2022-06-03 11:00    (응집물리 세미나) Theoretical Investigation of Exotic Quantum States in Low-dimensional Materials
232 2022-06-10 11:00    Record-quality two-dimensional electron systems file
231 2022-06-10 14:30    Combinatorial strategy for condensed matter physics: study on rare earth hexaborides thin films file
230 2022-06-10 16:00    Fe5GeTe2의 나선형 자성특성과 자기저항의 전류밀도 의존성 연구 file
229 2022-06-23 11:00    JILA’s search for the electron’s Electric Dipole Moment (eEDM) to probe physics beyond the standard model file
228 2022-07-14 13:30    Electronic structure and anomalous transport properties of topological materials by first principle calculation
227 2022-07-14 14:15    Hund and electronic correlations in ruthenium-based systems
226 2022-07-14 15:00    Pure two-dimensional quantum electron liquid and its phase transition
225 2022-07-21 16:00    Quintessential axions file
224 2022-08-01 10:00    [Update 세미나 영상] James Webb Space Telescope & OTE Commissioning
223 2022-08-08 14:00    Classical Shadow Tomography for Analog Quantum Simulators
222 2022-08-09 14:00    Quantum biology in fluorescent protein: a new model system to study quantum effects in biology file
221 2022-08-12 10:00    Twisted Bilayer Magnets file
220 2022-08-12 10:00    Twisted Bilayer Magnets file
219 2022-08-17 11:00    Robust Hamiltonian Engineering of Large Quantum Systems (큰 양자시스템의 견고한 해밀토니안 엔지니어링)
218 2022-08-18 10:00    Disorder-driven phase transition in the second-order non-Hermitian skin effect
217 2022-09-15 13:00    AdS black holes: a review
216 2022-09-21 10:30    [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT) file