Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

Mid-infrared InAs/InAsSb superlattice nBn photodetector monolithically integrated onto silicon

Tools
- Tools
+ Tools

Delli, Evangelia, Letka, Veronica, Hodgson, Peter D., Repiso, Eva, Hayton, Jonathan P., Craig, Adam P., Lu, Qi, Beanland, R., Krier, Anthony, Marshall, Andrew R. J. and Carrington, Peter J. (2019) Mid-infrared InAs/InAsSb superlattice nBn photodetector monolithically integrated onto silicon. ACS Photonics, 6 (2). pp. 538-544. doi:10.1021/acsphotonics.8b01550

[img]
Preview
PDF
WRAP-mid-infrared-InAsInAsSb-superlattice-nBn-photodetector-monolithically-integrated-silicon-Beanland-2019.pdf - Published Version - Requires a PDF viewer.
Available under License Creative Commons Attribution 4.0.

Download (3893Kb) | Preview
Official URL: https://doi.org/10.1021/acsphotonics.8b01550

Request Changes to record.

Abstract

Mid-infrared (MIR) silicon photonics holds the potential for realizing next generation ultracompact spectroscopic systems for applications in gas sensing, defense, and medical diagnostics. The direct epitaxial growth of antimonide-based compound semiconductors on silicon provides a promising approach for extending the wavelength of silicon photonics to the longer infrared range. This paper reports on the fabrication of a high performance MIR photodetector directly grown onto silicon by molecular beam epitaxy. The device exhibited an extended cutoff wavelength at ∼5.5 μm and a dark current density of 1.4 × 10–2 A/cm2 under 100 mV reverse bias at 200 K. A responsivity of 0.88 A/W and a specific detectivity in the order of 1.5 × 1010 Jones was measured at 200 K under 100 mV reverse bias operation. These results were achieved through the development of an innovative structure which incorporates a type-II InAs/InAsSb superlattice-based barrier nBn photodetector grown on a GaSb-on-silicon buffer layer. The difficulties in growing GaSb directly on silicon were overcome using a novel growth procedure consisting of an efficient AlSb interfacial misfit array, a two-step growth temperature procedure and dislocation filters resulting in a low defect density, antiphase domain free GaSb epitaxial layer on silicon. This work demonstrates that complex superlattice-based MIR photodetectors can be directly integrated onto a Si platform, which provides a pathway toward the realization of new, high performance, large area focal plane arrays and mid-infrared integrated photonic circuits.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Superlattices as materials, Photonics
Journal or Publication Title: ACS Photonics
Publisher: American Chemical Society (ACS)
ISSN: 2330-4022
Official Date: 16 January 2019
Dates:
DateEvent
16 January 2019Published
Volume: 6
Number: 2
Page Range: pp. 538-544
DOI: 10.1021/acsphotonics.8b01550
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/N018605/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
10216/114Royal Academy of Engineeringhttp://dx.doi.org/10.13039/501100000287
UNSPECIFIEDJoy Welch Educational Charitable TrustUNSPECIFIED
UNSPECIFIEDLancaster Universityhttp://dx.doi.org/10.13039/100010029

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics

twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us