Photocurrent detection of radially polarized optical vortex with hot electrons in Au/GaN
| cam.depositDate | 2022-05-16 | |
| cam.issuedOnline | 2022-05-16 | |
| dc.contributor.author | Hou, Y | |
| dc.contributor.author | Kappers, M | |
| dc.contributor.author | Jin, C | |
| dc.contributor.author | Oliver, R | |
| dc.contributor.orcid | Hou, Y [0000-0001-9461-3841] | |
| dc.contributor.orcid | Oliver, R [0000-0003-0029-3993] | |
| dc.date.accessioned | 2022-05-16T23:30:51Z | |
| dc.date.available | 2022-05-16T23:30:51Z | |
| dc.date.issued | 2022 | |
| dc.date.updated | 2022-05-16T13:09:24Z | |
| dc.description.abstract | <jats:p>We report a GaN based metal–semiconductor–metal (MSM) infrared photodetector enabled with azimuthally distributed sub-wavelength gratings fabricated on one of the working electrodes. Under illumination, hot electron transfer is introduced by the plasmonic resonance in the infrared waveband formed at the interface of Au/GaN. Without the help of using any external optical polarizers, the device is able to detect radial polarization vortices in the form of photocurrents with a prescribed response spectrum. The detector exhibits a 10%–90% rise and fall time of 0.9 ms under modulated light, much faster than that of conventional ultraviolet GaN MSM photodetectors based on the band edge absorption. This work provides a viable way to measure spatially variant polarization beams with a compact plasmonic photodetectors fabricated from wide bandgap semiconductors.</jats:p> | |
| dc.identifier.doi | 10.17863/CAM.84632 | |
| dc.identifier.eissn | 1077-3118 | |
| dc.identifier.issn | 0003-6951 | |
| dc.identifier.uri | https://www.repository.cam.ac.uk/handle/1810/337214 | |
| dc.language.iso | eng | |
| dc.publisher | AIP Publishing | |
| dc.publisher.department | Department of Materials Science And Metallurgy | |
| dc.publisher.url | http://dx.doi.org/10.1063/5.0094454 | |
| dc.rights | Attribution 4.0 International | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | 51 Physical Sciences | |
| dc.subject | 40 Engineering | |
| dc.subject | 4018 Nanotechnology | |
| dc.title | Photocurrent detection of radially polarized optical vortex with hot electrons in Au/GaN | |
| dc.type | Article | |
| dcterms.dateAccepted | 2022-05-04 | |
| prism.endingPage | 202101 | |
| prism.issueIdentifier | 20 | |
| prism.publicationDate | 2022 | |
| prism.publicationName | Applied Physics Letters | |
| prism.startingPage | 202101 | |
| prism.volume | 120 | |
| pubs.funder-project-id | Engineering and Physical Sciences Research Council (EP/M010589/1) | |
| pubs.funder-project-id | EPSRC (via University of Sheffield) (unknown) | |
| pubs.funder-project-id | EPSRC (via University College London (UCL)) (EP/T028475/1) | |
| pubs.licence-display-name | Apollo Repository Deposit Licence Agreement | |
| pubs.licence-identifier | apollo-deposit-licence-2-1 | |
| rioxxterms.type | Journal Article/Review | |
| rioxxterms.version | VoR | |
| rioxxterms.versionofrecord | 10.1063/5.0094454 |
Files
Original bundle
1 - 1 of 1
Loading...
- Name:
- 5.0094454.pdf
- Size:
- 1.63 MB
- Format:
- Adobe Portable Document Format
- Description:
- Published version
- Licence
- https://creativecommons.org/licenses/by/4.0/