Enhanced LWIR response of InP/InAsP quantum discs-in-nanowire array photodetectors by photogating and ultra-thin ITO contacts
(2024) In Nanotechnology 35(21).- Abstract
Here we report on an experimental and theoretical investigation of the long-wavelength infrared (LWIR) photoresponse of photodetectors based on arrays of three million InP nanowires with axially embedded InAsP quantum discs. An ultra-thin top indium tin oxide contact combined with a novel photogating mechanism facilitates an improved LWIR normal incidence sensitivity in contrast to traditional planar quantum well photodetectors. The electronic structure of the quantum discs, including strain and defect-induced photogating effects, and optical transition matrix elements were calculated by an 8-band k·p simulation along with solving drift-diffusion equations to unravel the physics behind the generation of narrow linewidth intersubband... (More)
Here we report on an experimental and theoretical investigation of the long-wavelength infrared (LWIR) photoresponse of photodetectors based on arrays of three million InP nanowires with axially embedded InAsP quantum discs. An ultra-thin top indium tin oxide contact combined with a novel photogating mechanism facilitates an improved LWIR normal incidence sensitivity in contrast to traditional planar quantum well photodetectors. The electronic structure of the quantum discs, including strain and defect-induced photogating effects, and optical transition matrix elements were calculated by an 8-band k·p simulation along with solving drift-diffusion equations to unravel the physics behind the generation of narrow linewidth intersubband signals observed from the quantum discs.
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- author
- Jeddi, Hossein LU ; Adham, Kristi LU ; Zhao, Yue LU ; Witzigmann, Bernd ; Römer, Friedhard ; Bermeo, Marie LU ; Borgström, Magnus T. LU and Pettersson, Håkan LU
- organization
- publishing date
- 2024-05-20
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- infrared photodetectors, long-wavelength infrared (LWIR), nanowire array photodetectors, nanowires, photogating, quantum discs-in-nanowires, ultra-thin ITO contacts
- in
- Nanotechnology
- volume
- 35
- issue
- 21
- article number
- 215206
- publisher
- IOP Publishing
- external identifiers
-
- pmid:38382119
- scopus:85187199398
- ISSN
- 0957-4484
- DOI
- 10.1088/1361-6528/ad2bd0
- language
- English
- LU publication?
- yes
- id
- 5a4805c0-1730-4e11-a356-5a967a945853
- date added to LUP
- 2024-04-02 15:26:27
- date last changed
- 2024-04-16 17:19:00
@article{5a4805c0-1730-4e11-a356-5a967a945853, abstract = {{<p>Here we report on an experimental and theoretical investigation of the long-wavelength infrared (LWIR) photoresponse of photodetectors based on arrays of three million InP nanowires with axially embedded InAsP quantum discs. An ultra-thin top indium tin oxide contact combined with a novel photogating mechanism facilitates an improved LWIR normal incidence sensitivity in contrast to traditional planar quantum well photodetectors. The electronic structure of the quantum discs, including strain and defect-induced photogating effects, and optical transition matrix elements were calculated by an 8-band k·p simulation along with solving drift-diffusion equations to unravel the physics behind the generation of narrow linewidth intersubband signals observed from the quantum discs.</p>}}, author = {{Jeddi, Hossein and Adham, Kristi and Zhao, Yue and Witzigmann, Bernd and Römer, Friedhard and Bermeo, Marie and Borgström, Magnus T. and Pettersson, Håkan}}, issn = {{0957-4484}}, keywords = {{infrared photodetectors; long-wavelength infrared (LWIR); nanowire array photodetectors; nanowires; photogating; quantum discs-in-nanowires; ultra-thin ITO contacts}}, language = {{eng}}, month = {{05}}, number = {{21}}, publisher = {{IOP Publishing}}, series = {{Nanotechnology}}, title = {{Enhanced LWIR response of InP/InAsP quantum discs-in-nanowire array photodetectors by photogating and ultra-thin ITO contacts}}, url = {{http://dx.doi.org/10.1088/1361-6528/ad2bd0}}, doi = {{10.1088/1361-6528/ad2bd0}}, volume = {{35}}, year = {{2024}}, }