Regensburg 2019 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 39: Quantum dots and wires: Optical properties I
HL 39.3: Talk
Thursday, April 4, 2019, 10:00–10:15, H34
Carrier dynamics and modulation properties in tunnel-injection based quantum-dot structures — •Michael Lorke1, Stephan Michael1, Igor Khanonkin2, Gadi Eisenstein2, and Frank Jahnke1 — 1Institute for Theoretical Physics, University of Bremen, Germany — 2Andrew and Erna Viterbi Department of Electrical Engineering, Technion, Haifa, Israel
For tunnel-injection (TI) quantum-dot (QD) lasers record high small signal modulation bandwidth and improved performance of 1.55µm InAs QDs on InP-based hetero-structures (1) were reported, which underscores their application potential for high-speed optical communication networks. However, large signal modulation, which really is the fingerprint of applicability in optical communication, is much less investigated. We present a theoretical analysis of TI laser and amplifier devices by combining material realistic electronic structure calculations with a detailed description of the carrier dynamics. Based on these investigations, we can give design guidelines to optimize the modulation bandwidth and turn-on delay.