Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 18: Semiconductor Lasers II

HL 18.4: Vortrag

Montag, 20. März 2017, 15:30–15:45, POT 06

Gain compression induced polarization mode competition in quantum-dot micropillar lasers: Effects of coherent feedback on multi-mode rate equations — •Benjamin Kurt Miller, Christoph Redlich, Lina Jaurigue, Benjamin Lingnau, and Kathy Lüdge — Institut f. Theo. Physik, Sekr. EW 7-1, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

Quantum-dot (QD) high-Q micropillar lasers are promising optoelectronic devices for data communication. The effects of feedback on QD lasers has profound consequences on stability and behavior, as seen in our previous work on single-mode QD micropillar lasers [1]. We investigated bimodal systems without feedback [2] and our preliminary results found that introducing feedback would induce novel dynamics. We present a bifurcation analysis of two-mode light emission from QD semiconductor micropillar VCSEL lasers subjected to optical feedback. Our model includes multi-mode rate equations with phenomenological gain compression parameters; a deterministic spontaneous emission parameter; and delayed, optical feedback. In this presentation, we consider the effects of tuning feedback phase, time delay, and intensity on the stability and output of a QD micropillar VCSEL. Our results offer optimization data for future experimental implementation.

References: [1]C. Otto, B. Globisch, K. Lüdge, E. Schöll and T. Erneux, Int. J. Bifurcation Chaos 22, 1250246 (2012). [2]C. Redlich, B. Lingnau, S. Holzinger, E. Schlottmann, S. Kreinberg, C. Schneider, M. Kamp, S. Höfling, J. Wolters, S. Reitzenstein, and K. Lüdge, New J. Phys. 18, 063011 (2016).