Impact of the carrier relaxation paths on two-state operation in quantum dot lasers


We study InGaAs QD laser operating simultaneously at ground (GS) and excited (ES) states under 30ns pulsed-pumping and distinguish three regimes of operation depending on the pump current and the carrier relaxation pathways. An increased current leads to an increase in ES intensity and to a decrease in GS intensity (or saturation) for low pump range, as typical for the cascade-like pathway. Both the GS and ES intensities are steadily increased for high current ranges, which prove the dominance of the direct capture pathway. The relaxation oscillations are not pronounced for these ranges. For the mediate currents, the interplay between the both pathways leads to the damped large amplitude relaxation oscillations with significant deviation of the relaxation oscillation frequency from the initial value during the pulse.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: G. S. Sokolovskii; V. V. Dudelev; E. D. Kolykhalova; K. K. Soboleva; A. G. Deryagin; I. I. Novikov; M. V. Maximov; A. E. Zhukov; V. M. Ustinov; V. I. Kuchinskii; W. Sibbett; E. U. Rafailov; E. A. Viktorov and T. Erneux, "Impact of the carrier relaxation paths on two-state operation in quantum dot lasers", Proc. SPIE 9357, Physics and Simulation of Optoelectronic Devices XXIII, 93570K (March 16, 2015). Copyright 2015 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI:
Event Title: Physics and simulation of optoelectronic devices XXIII
Event Type: Other
Event Dates: 2015-02-09 - 2015-02-12
Uncontrolled Keywords: laser diodes,qunatum dots,relaxation oscillations,two-state operation,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
ISBN: 978-1-6284-1447-9
Last Modified: 30 May 2024 07:38
Date Deposited: 16 Dec 2015 12:55
Full Text Link: http://proceedi ... ticleid=2208492
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference contribution
Published Date: 2015-03
Authors: Sokolovskii, G.S.
Dudelev, V.V.
Kolykhalova, E.D.
Soboleva, K.K.
Deryagin, A.G.
Novikov, I.I.
Maximov, M.V.
Zhukov, A.E.
Ustinov, V.M.
Kuchinskii, V.I.
Sibbett, W.
Rafailov, E.U. (ORCID Profile 0000-0002-4152-0120)
Viktorov, E.A.
Erneux, T.



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