Journal
NANOMATERIALS
Volume 12, Issue 15, Pages -Publisher
MDPI
DOI: 10.3390/nano12152599
Keywords
HgCdTe; MCT; quantum well; stimulated emission; room temperature; mid-IR; carrier heating
Categories
Funding
- Ministry of Science and Higher Education of the Russian Federation [075-15-2020-797, 13.1902.21.0024]
- CNRS through IRP TeraMIR
- French Agence Nationale pour la Recherche [ANR-19-CE30-0032]
- Agence Nationale de la Recherche (ANR) [ANR-19-CE30-0032] Funding Source: Agence Nationale de la Recherche (ANR)
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Stimulated emission in the 2.65-2.75 μm wavelength range at room temperature was observed in HgCdTe quantum well laser heterostructures. The effects of non-uniform excitation beam profile on SE threshold and carrier heating were studied.
Heterostructures with thin Hg(Cd)Te/CdHgTe quantum wells (QWs) are attractive for the development of mid-infrared interband lasers. Of particular interest are room-temperature operating emitters for the short-wavelength infrared range (SWIR, typically defined as 1.7-3 mu m). In this work, we report on the observation of stimulated emission (SE) in the 2.65-2.75 mu m wavelength range at room temperature in an optically pumped HgCdTe QW laser heterostructure. We study a series of three samples with lengths ranging from 2.5 to 7 mm and discuss the effects related to the non-uniformity of the excitation beam profile. SE threshold intensity and the magnitude of pump-induced carrier heating are found to be effectively dependent on the chip size, which should be accounted for in possible designs of HgCdTe-based optical converters. We also pay attention to the problem of active medium engineering in order to push the SE wavelength towards the 3-5 mu m atmospheric window and to lower the SE threshold.
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