GaAsP-GaAs nanowire quantum dots for novel quantum emitters
Lead Research Organisation:
UNIVERSITY COLLEGE LONDON
Department Name: Electronic and Electrical Engineering
Abstract
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Organisations
People |
ORCID iD |
| Huiyun Liu (Principal Investigator) |
Publications
Ali H
(2018)
High-Responsivity Photodetection by a Self-Catalyzed Phase-Pure p-GaAs Nanowire.
in Small (Weinheim an der Bergstrasse, Germany)
Boras G
(2020)
Checked patterned elemental distribution in AlGaAs nanowire branches via vapor-liquid-solid growth.
in Nanoscale
Boras G
(2024)
Quantum dots synthesis within ternary III-V nanowire towards light emitters in quantum photonic circuits: a review
in Nanotechnology
Boras G
(2021)
Self-Catalyzed AlGaAs Nanowires and AlGaAs/GaAs Nanowire-Quantum Dots on Si Substrates
in The Journal of Physical Chemistry C
Boras G
(2019)
III-V ternary nanowires on Si substrates: growth, characterization and device applications
in Journal of Semiconductors
Chan S
(2019)
Investigation into the current loss in InAs/GaAs quantum dot solar cells with Si-doped quantum dots
in Journal of Physics D: Applied Physics
Chen C
(2023)
Initialization of Nanowire or Cluster Growth Critically Controlled by the Effective V/III Ratio at the Early Nucleation Stage.
in The journal of physical chemistry letters
| Description | 1. Controlled and reproducible doping is essential for nanowires (NWs) to realize their functions. In this project, the doping mechanism of self-catalyzed NWs and the influence of self-catalytic droplets on the doping process are systematically studied This study is an essential step toward the design and fabrication of nanowire devices. 2. The growth of self-catalyzed core-shell NWs is investigated systematically using GaAs(P) NWs. The defects in the core NW are found to be detrimental for the shell growth. These defects are effectively eliminated by introducing beryllium (Be) doping during the NW core growth. Shells with pure zinc-blende crystal quality and highly regular morphology are successfully grown on the defect-free NW cores. These results provide useful information on guiding the growth of high-quality shell, which can greatly enhance the NW device performance. 3. Nanowire QW laser was achieved with record low threshold. 4. Nanowire quantum well structures have been developed as promising candidate for nanowire lasers. |
| Exploitation Route | These findings will enable high-qiality Nanowire materials and devices possible. We developed high-quality GaAs/GaAsP quantum-well nanowire emitters, including single-photon emitter and lasers. These devices could be potentially used in quantum technology and lighting areas. |
| Sectors | Digital/Communication/Information Technologies (including Software) Electronics Energy |
| Description | A National Research Facility for Epitaxy |
| Amount | £12,250,477 (GBP) |
| Funding ID | EP/X015300/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 05/2022 |
| End | 06/2027 |
| Description | EPSRC Centre for Doctoral Training in Compound Semiconductor Manufacturing |
| Amount | £6,589,026 (GBP) |
| Funding ID | EP/S024441/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 05/2019 |
| End | 12/2027 |
| Description | EPSRC Future Manufacturing Hub |
| Amount | £10,330,423 (GBP) |
| Funding ID | EP/P006973/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 09/2016 |
| End | 09/2023 |
| Description | H2020-MSCA-ITN-2016 Marie Sklodowska-Curie Innovative Training Networks |
| Amount | € 1,000,000 (EUR) |
| Organisation | European Commission |
| Department | Horizon 2020 |
| Sector | Public |
| Country | European Union (EU) |
| Start | 01/2017 |
| End | 12/2020 |
| Description | National Epitaxy Facility |
| Amount | £12,000,000 (GBP) |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 01/2017 |
| End | 12/2021 |
| Description | Phosphide-based nanowires for visible and near-infrared miniature photon emitters |
| Amount | £940,501 (GBP) |
| Funding ID | EP/W002302/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 03/2022 |
| End | 04/2025 |
| Title | Analysed Data for Nanoskived GaAsP/GaAs Heterostructures: PL Spectra Fit Parameters, Geometrical Data from SEM, Transition Energies from Nextnano Simulations |
| Description | This dataset is used in the research "Improving Quantum Well Tube Homogeneity Using Strained Nanowire Heterostructures". It underpins the findings that the radial quantum well heterostructure, specifically the GaAsP/GaAs core/shell, configuration is able to host highly strained systems that improve optoelectronic homogeneity with a reduced dependence on overall morphological variations. h5 dataset containing 3 groups of analysed data: Photoluminescence (PL) map fitting data: Lasher-Stern-Wurfel (LSW) fitting parameters, coordinates of individual heterostructures within PL map, raw PL spectra and corresponding LSW fitted curves Data from analysed Scanning Electron Microscopy (SEM) images including diameters, coordinates of individual structures, solidity and eccentricity of detected heterostructures Transitions energies from nextnano simulations for 10 eigenvalues at a series of quantum well (QW) widths, L, from L = 3 to 12 nm at differing phosphorous concentrations (P = 44%, 47% and 50%) in the strained systems and in an unstrained system for comparison. Analysis scripts (MATLAB) are also provided, with a readme.txt file for instructions on how to use and replicate figures from the associated manuscript. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2023 |
| Provided To Others? | Yes |
| Impact | It underpins the findings that the radial quantum well heterostructure, specifically the GaAsP/GaAs core/shell, configuration is able to host highly strained systems that improve optoelectronic homogeneity with a reduced dependence on overall morphological variations. |
| URL | https://figshare.manchester.ac.uk/articles/dataset/Analysed_Data_for_Nanoskived_GaAsP_GaAs_Heterostr... |
| Title | Analysed Data for Nanoskived GaAsP/GaAs Heterostructures: PL Spectra Fit Parameters, Geometrical Data from SEM, Transition Energies from Nextnano Simulations |
| Description | This dataset is used in the research "Improving Quantum Well Tube Homogeneity Using Strained Nanowire Heterostructures". It underpins the findings that the radial quantum well heterostructure, specifically the GaAsP/GaAs core/shell, configuration is able to host highly strained systems that improve optoelectronic homogeneity with a reduced dependence on overall morphological variations. h5 dataset containing 3 groups of analysed data: Photoluminescence (PL) map fitting data: Lasher-Stern-Wurfel (LSW) fitting parameters, coordinates of individual heterostructures within PL map, raw PL spectra and corresponding LSW fitted curves Data from analysed Scanning Electron Microscopy (SEM) images including diameters, coordinates of individual structures, solidity and eccentricity of detected heterostructures Transitions energies from nextnano simulations for 10 eigenvalues at a series of quantum well (QW) widths, L, from L = 3 to 12 nm at differing phosphorous concentrations (P = 44%, 47% and 50%) in the strained systems and in an unstrained system for comparison. Analysis scripts (MATLAB) are also provided, with a readme.txt file for instructions on how to use and replicate figures from the associated manuscript. |
| Type Of Material | Database/Collection of data |
| Year Produced | 2023 |
| Provided To Others? | Yes |
| Impact | This research dataset is highly valuable for identifying high-quality devices with a substantial number of samples. |
| URL | https://figshare.manchester.ac.uk/articles/dataset/Analysed_Data_for_Nanoskived_GaAsP_GaAs_Heterostr... |
| Title | Imagery, Spectra, and SEM |
| Description | The dataset containing 2 groups of data: 1. Photoluminescence (PL) map fitting data (Lasher-Stern Werfel (LSW) fitting parameters, coordinates of individual heterostructures within PL map, raw PL spectra and corresponding LSW fitted curves) 2. Data from analysed Scanning Electron Microscopy (SEM) images (diameters, coordinates of individual structures, solidity and eccentricity of detected heterostructures) |
| Type Of Material | Database/Collection of data |
| Year Produced | 2023 |
| Provided To Others? | Yes |
| Impact | This dataset underpins the measurement of intrawire and interwire disorder for GaAs/GaAsP nanowire segments. It shows that highly homogeneous emission can be achieved through strain management in quantum well systems. |
| URL | https://figshare.manchester.ac.uk/articles/dataset/Research_Data_for_Improving_Quantum_Well_Tube_Hom... |