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
96 2023-07-10 16:00    Electronic structures of magnetic and non-magnetic ordering in d- and f-electrons systems
95 2023-07-11 11:00    Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
94 2023-07-12 11:00    Study of spin-1/2 antiferromagnetic kagome Heisenberg model by symmetric projected entangled simplex states
93 2023-07-14 11:00    Interfaces engineering of thin film oxides
92 2023-07-18 11:00    Non-Hermitian Casimir Effect of Magnons
91 2023-07-19 16:00    [High-Energy Theory Seminar]Deriving the Simplest Gauge-String Duality
90 2023-07-20 16:00    [CAPP Seminar] Cosmoparticle Physics of Dark Universe file
89 2023-07-26 10:00    [CAPP Seminar] Am Expansive Search for Dark Matter with ADMX and DM Radio
88 2023-08-23 16:00    [High Energy Theory Seminar] A spacetime tensor network for AdS3/CFT2
87 2023-08-24 11:00    Advancing magnonic metamaterials: spin waves in nanomagnetic arrays
86 2023-08-24 12:00    2023 가을학기 콜로키움 전체 일정 file
85 2023-08-29 16:00    [High Energy Theory Seminar] Towards string loop corrections in Calabi-Yau orientifold compactifications.
84 2023-09-07 12:00    2023 가을학기 광학분야 및 응집물리 특별세미나 전체 일정 file
83 2023-09-13 16:00    [High Energy Theory Seminar] Cosmic Birefringence from Dark Photon
82 2023-09-14 16:00    [CAPP seminar] Dark matter searches in Water Cherenkov Detectors file
81 2023-09-18 11:00    Magic polarisation trapping of polar molecules for tunable dipolar interactions file
80 2023-09-18 16:00    [CAPP Seminar] Searching for axions in quantum vacuum birefringence file
79 2023-09-21 16:00    [CAPP seminar] Axion Magnetic Resonance file
78 2023-09-26 16:00    [High Energy Theory Seminar]A new step in interacting dark sector cosmologies
77 2023-09-27 16:00    Chiral Magnets: Domain-Wall Skyrmions and String Theory Realization