On the importance of antimony for temporal evolution of emission from self-assembled (InGa) (AsSb)/GaAs quantum dots on GaP(001)
Year: 2021
Type: article
Abstract: Understanding the carrier dynamics of nanostructures is the key for development and optimization of novel semiconductor nano-devices. Here, we study the optical properties and carrier dynamics of (InGa)(AsSb)/GaAs/GaP quantum dots (QDs) by means of non-resonant energy and time-resolved photoluminescence depending on temperature. Studying this material system is fundamental in view of the ongoing implementation of such QDs for nano memory devices. The structures studied in this work include a single QD layer, QDs overgrown by a GaSb capping layer, and solely a GaAs quantum well, respectively. Theoretical analytical models allow to discern the common spectral features around the emission energy of 1.8 eV related to the GaAs quantum well and the GaP substrate. We observe type-I emission from QDs with recombination times between 2 ns and 10 ns, increasing towards lower energies. Moreover, based on the considerable tunability of the QDs depending on Sb incorporation, we suggest their utilization as quantum photonic sources embedded in complementary metal-oxide-semiconductor platforms, due to the feasibility of a nearly defect-free growth of GaP on Si. Finally, our analysis confirms the nature of the pumping power blue-shift of emission originating from the charged-background induced changes of the wavefunction spatial distribution.
Source: New Journal of Physics
Authors: Petr Steindl, Elisa Maddalena Sala, Benito Alén, Dieter Bimberg, Petr Klenovský
Institutions: Leiden University, Masaryk University, Engineering and Physical Sciences Research Council, Technische Universität Berlin, University of Sheffield, Institute of Micro and Nanotechnology, Chinese Academy of Sciences, Changchun Institute of Optics, Fine Mechanics and Physics, Český metrologický institut
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,195
Funders: European Commission, Deutsche Forschungsgemeinschaft, Ministerstvo Školství, Mládeže a Tělovýchovy, Ministerio de Ciencia e Innovación, Central European Institute of Technology, QuantERA, Horizon 2020 Framework Programme, H2020 European Institute of Innovation and Technology, European Metrology Programme for Innovation and Research
Awards: Many-photon quantum entanglement, G114353912, G1301723534, G1821410893, G1953887145, G2693309452, G3389233040, G3485162421, G3496015395, G3545540176, G3690828678, G3703044891, G3843345816, G4012842235, G4121902406, G434337789, G5005566375, G5032364540, CEITEC 2020, QuantERA ERA-NET Cofund in Quantum Technologies, G5524032613, G5773346445, G589851834, G5962630234, G6055825738, Quantum Semiconductor Technologies Exploiting Antimony, G6321684584, G7222672934, G8653124682
OpenAlex ID: W3122486701