Home > Research > Publications & Outputs > Resonant cavity-enhanced photodetector incorpor...

Links

Text available via DOI:

View graph of relations

Resonant cavity-enhanced photodetector incorporating a type-II superlattice to extend MWIR sensitivity

Research output: Contribution to journalJournal article

Published

Standard

Resonant cavity-enhanced photodetector incorporating a type-II superlattice to extend MWIR sensitivity. / Letka, Veronica; Bainbridge, Andrew; Craig, Adam; Al-Saymari, Furat; Marshall, Andrew.

In: Optics Express, Vol. 27, No. 17, 19.08.2019, p. 23970-23980.

Research output: Contribution to journalJournal article

Harvard

APA

Vancouver

Author

Bibtex

@article{301c05e76c3f40088a0e0ebade239e98,
title = "Resonant cavity-enhanced photodetector incorporating a type-II superlattice to extend MWIR sensitivity",
abstract = "Mid-infrared resonant cavity-enhanced photodetectors (RCE PD) present a promising technology for targeted gas detection. We demonstrate an RCE PD incorporating an InAs/InAsSb superlattice as the detecting element, extending the resonant wavelength beyond 4 µm. AlAsSb/GaSb mirrors and a unipolar barrier active region paralleling an nBn structure are also used, and performance is compared to a conventional broadband nBn detector incorporating the same superlattice. The RCE PD exhibited a Q-factor of ∼90 and an extremely stable resonance wavelength. Peak responsivity was 3.0 A W−1 at 240 K, equalling 84% quantum efficiency, a 5.5 times increase over the reference nBn at the same wavelength. Dark current density was 3.3×10−2 A cm−2 at 240 K, falling to 2.7×10−4 A cm−2 at 180 K. The broadband BLIP limit is approached at 180 K with specific detectivity of 2.1×1011 cm Hz1/2 W−1 , which presents thepotential of achieving BLIP-limited operation in the thermoelectric cooling regime.",
author = "Veronica Letka and Andrew Bainbridge and Adam Craig and Furat Al-Saymari and Andrew Marshall",
year = "2019",
month = aug
day = "19",
doi = "10.1364/OE.27.023970",
language = "English",
volume = "27",
pages = "23970--23980",
journal = "Optics Express",
issn = "1094-4087",
publisher = "Optical Society of American (OSA)",
number = "17",

}

RIS

TY - JOUR

T1 - Resonant cavity-enhanced photodetector incorporating a type-II superlattice to extend MWIR sensitivity

AU - Letka, Veronica

AU - Bainbridge, Andrew

AU - Craig, Adam

AU - Al-Saymari, Furat

AU - Marshall, Andrew

PY - 2019/8/19

Y1 - 2019/8/19

N2 - Mid-infrared resonant cavity-enhanced photodetectors (RCE PD) present a promising technology for targeted gas detection. We demonstrate an RCE PD incorporating an InAs/InAsSb superlattice as the detecting element, extending the resonant wavelength beyond 4 µm. AlAsSb/GaSb mirrors and a unipolar barrier active region paralleling an nBn structure are also used, and performance is compared to a conventional broadband nBn detector incorporating the same superlattice. The RCE PD exhibited a Q-factor of ∼90 and an extremely stable resonance wavelength. Peak responsivity was 3.0 A W−1 at 240 K, equalling 84% quantum efficiency, a 5.5 times increase over the reference nBn at the same wavelength. Dark current density was 3.3×10−2 A cm−2 at 240 K, falling to 2.7×10−4 A cm−2 at 180 K. The broadband BLIP limit is approached at 180 K with specific detectivity of 2.1×1011 cm Hz1/2 W−1 , which presents thepotential of achieving BLIP-limited operation in the thermoelectric cooling regime.

AB - Mid-infrared resonant cavity-enhanced photodetectors (RCE PD) present a promising technology for targeted gas detection. We demonstrate an RCE PD incorporating an InAs/InAsSb superlattice as the detecting element, extending the resonant wavelength beyond 4 µm. AlAsSb/GaSb mirrors and a unipolar barrier active region paralleling an nBn structure are also used, and performance is compared to a conventional broadband nBn detector incorporating the same superlattice. The RCE PD exhibited a Q-factor of ∼90 and an extremely stable resonance wavelength. Peak responsivity was 3.0 A W−1 at 240 K, equalling 84% quantum efficiency, a 5.5 times increase over the reference nBn at the same wavelength. Dark current density was 3.3×10−2 A cm−2 at 240 K, falling to 2.7×10−4 A cm−2 at 180 K. The broadband BLIP limit is approached at 180 K with specific detectivity of 2.1×1011 cm Hz1/2 W−1 , which presents thepotential of achieving BLIP-limited operation in the thermoelectric cooling regime.

U2 - 10.1364/OE.27.023970

DO - 10.1364/OE.27.023970

M3 - Journal article

VL - 27

SP - 23970

EP - 23980

JO - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 17

ER -