Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Enhanced LWIR response of InP/InAsP quantum discs-in-nanowire array photodetectors by photogating and ultra-thin ITO contacts

Jeddi, Hossein LU ; Adham, Kristi LU ; Zhao, Yue LU ; Witzigmann, Bernd ; Römer, Friedhard ; Bermeo, Marie LU ; Borgström, Magnus T. LU and Pettersson, Håkan LU (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.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; and
organization
publishing date
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}},
}