Electroluminescence enhancement in mid-infrared InAsSb resonant cavity light emitting diodes for CO 2 detection

Al-Saymari, F.A. and Craig, A.P. and Noori, Y.J. and Lu, Q. and Marshall, A.R.J. and Krier, A. (2019) Electroluminescence enhancement in mid-infrared InAsSb resonant cavity light emitting diodes for CO 2 detection. Applied Physics Letters, 114 (17). ISSN 0003-6951

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In this work, we demonstrated a mid-infrared resonant cavity light emitting diode (RCLED) operating near 4.2 μm at room temperature, grown lattice-matched on a GaSb substrate by molecular beam epitaxy, suitable for CO 2 gas detection. The device consists of a 1 λ-thick microcavity containing an InAs 0.90 Sb 0.1 active region sandwiched between two high contrast, lattice-matched AlAs 0.08 Sb 0.92 /GaSb distributed Bragg reflector (DBR) mirrors. The electroluminescence emission spectra of the RCLED were recorded over the temperature range from 20 to 300 K and compared with a reference LED without DBR mirrors. The RCLED exhibits a strong emission enhancement due to resonant cavity effects. At room temperature, the peak emission and the integrated peak emission were found to be increased by a factor of ∼ 70 and ∼ 11, respectively, while the total integrated emission enhancement was ∼ × 33. This is the highest resonant cavity enhancement ever reported for a mid-infrared LED operating at this wavelength. Furthermore, the RCLED also exhibits a superior temperature stability of ∼ 0.35 nm/K and a significantly narrower (10×) spectral linewidth. High spectral brightness and temperature stable emission entirely within the fundamental absorption band are attractive characteristics for the development of next generation CO 2 gas sensor instrumentation. © 2019 Author(s).

Item Type: Journal Article
Journal or Publication Title: Applied Physics Letters
Additional Information: Copyright 2019 American Institute of Physics. The following article appeared in Applied Physics Letters, 114, (17) 2019 and may be found at http://dx.doi.org/10.1063/1.5090840 This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3101
Departments: Faculty of Science and Technology > Physics
ID Code: 133799
Deposited By: ep_importer_pure
Deposited On: 20 May 2019 09:40
Refereed?: Yes
Published?: Published
Last Modified: 22 Feb 2020 05:07
URI: https://eprints.lancs.ac.uk/id/eprint/133799

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