Impact of Coulomb Scattering on the Ultrafast Gain Recovery in InGaAs Quantum Dots

J. Gomis-Bresco, S. Dommers, V. V. Temnov, U. Woggon, M. Laemmlin, D. Bimberg, E. Malic, M. Richter, E. Schöll, and A. Knorr
Phys. Rev. Lett. 101, 256803 – Published 16 December 2008

Abstract

The application of quantum dot (QD) semiconductor optical amplifiers (SOAs) in above 100-Gbit Ethernet networks demands an ultrafast gain recovery on time scales similar to that of the input pulse 100GHz repetition frequency. Microscopic scattering processes have to act at shortest possible time scales and mechanisms speeding up the Coulomb scattering have to be explored, controlled, and exploited. We present a microscopic description of the gain recovery by coupled polarization- and population dynamics in a thermal nonequilibrium situation going beyond rate-equation models and discuss the limitations of Coulomb scattering between 0D and 2D-confined quantum states. An experiment is designed which demonstrates the control of gain recovery for THz pulse trains in InGaAs QD-based SOAs under powerful electrical injection.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 6 June 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.256803

©2008 American Physical Society

Authors & Affiliations

J. Gomis-Bresco, S. Dommers, V. V. Temnov, and U. Woggon*

  • Institut für Optik und Atomare Physik, Technische Universität Berlin, 10623 Berlin, Germany

M. Laemmlin and D. Bimberg

  • Institut für Festkörperphysik, Technische Universität Berlin, 10623 Berlin, Germany

E. Malic, M. Richter, E. Schöll, and A. Knorr

  • Institut für Theoretische Physik, Technische Universität Berlin, 10623 Berlin, Germany

  • *ulrike.woggon@tu-berlin.de

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 101, Iss. 25 — 19 December 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×