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Main Title: Twofold gain enhancement by elongation of QDs in polarization preserving QD-SOAs
Author(s): Greif, Ludwig Albrecht Thorsten
Mittelstädt, Alexander
Jagsch, Stefan Thomas
Schliwa, Andrei
Type: Article
Referenced By: 10.14279/depositonce-10409
Language Code: en
Abstract: The impact of quantum dot (QD) elongation on key parameters of QD-based semiconductor optical amplifiers (SOAs) is investigated using a combination of 8-band k·p-theory including strain and piezoelectricity up to second order and a rate equation model describing the population of QD ground, excited and wetting layer states. By considering columnar QDs of selected aspect ratios, we show that chip gain and saturation gain can be enhanced by up to +3.6 dB via an increased elongation of the individual QDs while retaining polarization preserving amplification and gain recovery times below 700 fs. Our results enable the optimization of polarization preserving QD-SOA devices which combine ultrafast gain recovery with high gain and low power consumption.
Issue Date: 6-Jun-2019
Date Available: 21-Aug-2020
DDC Class: 530 Physik
Subject(s): self-assembled quantum dots
semiconductor optical amplifier
gain enhancement
Sponsor/Funder: DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelemente
Journal Title: Semiconductor Science and Technology
Publisher: Institute of Physics Publishing (IOP)
Publisher Place: Bristol
Volume: 34
Issue: 7
Article Number: 075003
Publisher DOI: 10.1088/1361-6641/ab1c06
EISSN: 1361-6641
ISSN: 0268-1242
Appears in Collections:FG Optische Charakterisierung von Halbleitern » Publications

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