Optical Studies and Transmission Electron Microscopy of HgCdTe Quantum Well Heterostructures for Very Long Wavelength Lasers

HgTe/CdHgTe quantum well (QW) heterostructures have attracted a lot of interest recently due to insights they provided towards the physics of topological insulators and massless Dirac fermions. Our work focuses on HgCdTe QWs with the energy spectrum close to the graphene-like relativistic dispersion...

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Veröffentlicht in:Nanomaterials (Basel, Switzerland) Jg. 11; H. 7; S. 1855
Hauptverfasser: Rumyantsev, Vladimir V., Razova, Anna A., Bovkun, Leonid S., Tatarskiy, Dmitriy A., Mikhailovskii, Vladimir Y., Zholudev, Maksim S., Ikonnikov, Anton V., Uaman Svetikova, Tatyana A., Maremyanin, Kirill V., Utochkin, Vladimir V., Fadeev, Mikhail A., Remesnik, Vladimir G., Aleshkin, Vladimir Y., Mikhailov, Nikolay N., Dvoretsky, Sergey A., Potemski, Marek, Orlita, Milan, Gavrilenko, Vladimir I., Morozov, Sergey V.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Basel MDPI AG 19.07.2021
MDPI
Schriftenreihe:Semiconductor Hetero-Nanostructures for Opto-Electronics Applications
Schlagworte:
Augers
Energy spectra
Experiments
Fermions
Graphene
Heterostructures
HgCdTe
Lasers
Mercury cadmium tellurides
Molecular beam epitaxy
Operating temperature
Optical measurement
Photoconductivity
Photoluminescence
Photons
Physics
Quantum wells
Radiation
Recombination
Retrofitting
Sensors
Spectrum analysis
stimulated emission
Topological insulators
Transmission electron microscopy
Waveguides
Wavelengths
Germany
HgCdTe
heterostructures
stimulated emission
ISSN:2079-4991, 2079-4991
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Zusammenfassung:HgTe/CdHgTe quantum well (QW) heterostructures have attracted a lot of interest recently due to insights they provided towards the physics of topological insulators and massless Dirac fermions. Our work focuses on HgCdTe QWs with the energy spectrum close to the graphene-like relativistic dispersion that is supposed to suppress the non-radiative Auger recombination. We combine various methods such as photoconductivity, photoluminescence and magneto-optical measurements as well as transmission electron microscopy to retrofit growth parameters in multi-QW waveguide structures, designed for long wavelengths lasing in the range of 10–22 μm. The results reveal that the attainable operating temperatures and wavelengths are strongly dependent on Cd content in the QW, since it alters the dominating recombination mechanism of the carriers.
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PMCID: PMC8308432
ISSN:2079-4991
2079-4991
DOI:10.3390/nano11071855