Publication result detail

2.7 mu m quantum cascade detector: Above band gap energy intersubband detection

GIPARAKIS, M.; KNOTIG, H.; DETZ, H.; BEISER, M.; SCHRENK, W.; SCHWARZ, B.; STRASSER, G.; ANDREWS, A.

Original Title

2.7 mu m quantum cascade detector: Above band gap energy intersubband detection

English Title

2.7 mu m quantum cascade detector: Above band gap energy intersubband detection

Type

WoS Article

Original Abstract

Quantum cascade detectors (QCDs) are mid-infrared and far-infrared, low-noise, photovoltaic detectors utilizing intersubband transitions. This Letter presents an InAs/AlAs0.16Sb0.84 based QCD lattice matched to an InAs substrate. This material system exhibits properties like a low effective electron mass of the well material of 0.023 m(0), beneficial for higher optical absorption strength, and a high conduction band offset of 2.1 eV, allowing the design of QCDs in the mid-infrared and near-infrared region. The presented QCD has a peak spectral response at 2.7 mu m (0.459 eV), the center of a CO2 absorption band. To enable top side illumination, a grating was implemented. This additionally bypasses absorption by the narrow bandgap 0.345 eV (3.54 mu m) InAs substrate material. The QCD has a peak responsivity at a room temperature of 5.63 mA/W and a peak specific detectivity of 1.14 x 10(8) Jones. (c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

English abstract

Quantum cascade detectors (QCDs) are mid-infrared and far-infrared, low-noise, photovoltaic detectors utilizing intersubband transitions. This Letter presents an InAs/AlAs0.16Sb0.84 based QCD lattice matched to an InAs substrate. This material system exhibits properties like a low effective electron mass of the well material of 0.023 m(0), beneficial for higher optical absorption strength, and a high conduction band offset of 2.1 eV, allowing the design of QCDs in the mid-infrared and near-infrared region. The presented QCD has a peak spectral response at 2.7 mu m (0.459 eV), the center of a CO2 absorption band. To enable top side illumination, a grating was implemented. This additionally bypasses absorption by the narrow bandgap 0.345 eV (3.54 mu m) InAs substrate material. The QCD has a peak responsivity at a room temperature of 5.63 mA/W and a peak specific detectivity of 1.14 x 10(8) Jones. (c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Keywords

LASERS

Key words in English

LASERS

Authors

GIPARAKIS, M.; KNOTIG, H.; DETZ, H.; BEISER, M.; SCHRENK, W.; SCHWARZ, B.; STRASSER, G.; ANDREWS, A.

RIV year

2023

Released

14.02.2022

Publisher

AIP Publishing

Location

MELVILLE

ISBN

1077-3118

Periodical

APPLIED PHYSICS LETTERS

Volume

120

Number

7

State

United States of America

Pages from

1

Pages to

4

Pages count

4

URL

https://aip.scitation.org/doi/10.1063/5.0076856

Full text in the Digital Library

http://hdl.handle.net/11012/208237

BibTex

@article{BUT178603,
  author="Miriam {Giparakis} and Hedwig {Knotig} and Hermann {Detz} and Maximilian {Beiser} and Werner {Schrenk} and Benedikt {Schwarz} and Gottfried {Strasser} and Aaron Maxwell {Andrews}",
  title="2.7 mu m quantum cascade detector: Above band gap energy intersubband detection",
  journal="APPLIED PHYSICS LETTERS",
  year="2022",
  volume="120",
  number="7",
  pages="1--4",
  doi="10.1063/5.0076856",
  issn="0003-6951",
  url="https://aip.scitation.org/doi/10.1063/5.0076856"
}

Documents

5.0076856