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HL: Fachverband Halbleiterphysik
HL 13: Poster Session III
HL 13.16: Poster
Tuesday, September 28, 2021, 13:30–16:30, P
Carrier dynamics and modulation properties in tunnel- injection based quantum-dot structures — •Michael Lorke1, Igor Khanonkin2, Stephan Michael1, 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 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.