Singly doped colloidal quantum dots as optically addressed nanopositionable qubits
Colloidal quantum dots (CQDs) are isolated semiconductor nanocrystals with a size-tunable bandgap that can be prepared and processed by well-established solvent-based chemistry, and are currently used for a number of optoelectronic applications. When doped with a single atom, they also have great po...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
|
| Series: | Materials for Quantum Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2633-4356/ad13a0 |
| _version_ | 1826531309328007168 |
|---|---|
| author | Rachel M Barrett David J Binks |
| author_facet | Rachel M Barrett David J Binks |
| author_sort | Rachel M Barrett |
| collection | DOAJ |
| description | Colloidal quantum dots (CQDs) are isolated semiconductor nanocrystals with a size-tunable bandgap that can be prepared and processed by well-established solvent-based chemistry, and are currently used for a number of optoelectronic applications. When doped with a single atom, they also have great potential as a platform for optically addressable spin qubits. This perspective first describes the process by which doped CQDs can be made and the electronic structure produced in them by doping with a single atom. The properties that make them particularly well-suited as a spin-photon interface are identified: a local environment for the dopant that is free of unwanted spins; an optical cross-section for the dopant that can be enhanced by orders of magnitude via an exchange interaction with the band edge exciton of the dot; and, as an isolated nanocrystal, the scope for nano-positioning and hence precise incorporation into device structures. Lastly, two areas for development are discussed which would enhance the impact of singly doped quantum dots on quantum technology. The first of these is a synthetic method that ensures deterministic doping with single atoms and the second is to expand the range of dopants available. |
| first_indexed | 2024-03-08T21:45:24Z |
| format | Article |
| id | doaj.art-dde27e1c19ea4e0fadb13815a09004cb |
| institution | Directory Open Access Journal |
| issn | 2633-4356 |
| language | English |
| last_indexed | 2025-03-14T01:33:17Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials for Quantum Technology |
| spelling | doaj.art-dde27e1c19ea4e0fadb13815a09004cb2025-03-12T14:26:37ZengIOP PublishingMaterials for Quantum Technology2633-43562023-01-013404300110.1088/2633-4356/ad13a0Singly doped colloidal quantum dots as optically addressed nanopositionable qubitsRachel M Barrett0David J Binks1https://orcid.org/0000-0002-9102-0941Department of Physics and Astronomy & Photon Science Institute, University of Manchester , Manchester M13 9PL, United KingdomDepartment of Physics and Astronomy & Photon Science Institute, University of Manchester , Manchester M13 9PL, United KingdomColloidal quantum dots (CQDs) are isolated semiconductor nanocrystals with a size-tunable bandgap that can be prepared and processed by well-established solvent-based chemistry, and are currently used for a number of optoelectronic applications. When doped with a single atom, they also have great potential as a platform for optically addressable spin qubits. This perspective first describes the process by which doped CQDs can be made and the electronic structure produced in them by doping with a single atom. The properties that make them particularly well-suited as a spin-photon interface are identified: a local environment for the dopant that is free of unwanted spins; an optical cross-section for the dopant that can be enhanced by orders of magnitude via an exchange interaction with the band edge exciton of the dot; and, as an isolated nanocrystal, the scope for nano-positioning and hence precise incorporation into device structures. Lastly, two areas for development are discussed which would enhance the impact of singly doped quantum dots on quantum technology. The first of these is a synthetic method that ensures deterministic doping with single atoms and the second is to expand the range of dopants available.https://doi.org/10.1088/2633-4356/ad13a0spin qubitcolloidal quantum dotspin-photon interface |
| spellingShingle | Rachel M Barrett David J Binks Singly doped colloidal quantum dots as optically addressed nanopositionable qubits Materials for Quantum Technology spin qubit colloidal quantum dot spin-photon interface |
| title | Singly doped colloidal quantum dots as optically addressed nanopositionable qubits |
| title_full | Singly doped colloidal quantum dots as optically addressed nanopositionable qubits |
| title_fullStr | Singly doped colloidal quantum dots as optically addressed nanopositionable qubits |
| title_full_unstemmed | Singly doped colloidal quantum dots as optically addressed nanopositionable qubits |
| title_short | Singly doped colloidal quantum dots as optically addressed nanopositionable qubits |
| title_sort | singly doped colloidal quantum dots as optically addressed nanopositionable qubits |
| topic | spin qubit colloidal quantum dot spin-photon interface |
| url | https://doi.org/10.1088/2633-4356/ad13a0 |
| work_keys_str_mv | AT rachelmbarrett singlydopedcolloidalquantumdotsasopticallyaddressednanopositionablequbits AT davidjbinks singlydopedcolloidalquantumdotsasopticallyaddressednanopositionablequbits |