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

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., Viktorov, E.A. and Erneux, T. (2015). Impact of the carrier relaxation paths on two-state operation in quantum dot lasers. IN: Physics and simulation of optoelectronic devices XXIII. Witzigmann, Bernd; Osiński, Marek; Henneberger, Fritz and Arakawa, Yasuhiko (eds) SPIE proceedings . USA: SPIE.

Abstract

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.

Publication DOI: https://doi.org/10.1117/12.2078746
Divisions: Engineering & Applied Sciences > Aston Institute of Photonics Technology
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: http://dx.doi.org/10.1117/12.2078746
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
Full Text Link: http://proceedi ... ticleid=2208492
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
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. ( 0000-0002-4152-0120)
Viktorov, E.A.
Erneux, T.

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