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Excitonic lasing of strain-free InP(As) quantum dots in AlInAs microdisk
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Date
2017-03-20
Authors
Lebedev, D. V.
Kulagina, M. M.
Troshkov, S. I.
Vlasov, A. S.
Davydov, V. Y.
Smirnov, A. N.
Bogdanov, A. A.
Merz, J. L.
Kapaldo, J.
GocaliĆska, Agnieszka M.
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AIP Publishing
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Abstract
Formation, emission, and lasing properties of strain-free InP(As)/AlInAs quantum dots (QDs) embedded in AlInAs microdisk (MD) cavity were investigated using transmission electron microscopy and photoluminescence (PL) techniques. In MD structures, the QDs have the nano-pan-cake shape with the height of similar to 2 nm, the lateral size of 20-50 nm, and the density of similar to 5-10(9) cm(-2). Their emission observed at similar to 940 nm revealed strong temperature quenching, which points to exciton decomposition. It also showed unexpected type-I character, indicating In-As intermixing as confirmed by band structure calculations. We observed lasing of InP(As) QD excitons into whispering gallery modes in MD having the diameter of similar to 3.2 lm and providing a free spectral range of similar to 27 nm and quality factors up to Q similar to 13 000. Threshold of similar to 50 W/cm(2Y) and spontaneous emission coupling coefficient of similar to 0.2 were measured for this MD-QD system. Published by AIP Publishing.
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Keywords
Whispering-gallery modes , Lasers , Emission , Microcavity , Boxes , Aluminium compounds , Excitons , III-V semiconductors , Indium compounds , Microcavity lasers , Microdisc lasers , Photoluminescence , Q-factor , Quantum dot lasers , Semiconductor quantum dots , Spontaneous emission , Transmission electron microscopy , Whispering gallery mode
Citation
Lebedev, D. V., Kulagina, M. M., Troshkov, S. I., Vlasov, A. S., Davydov, V. Y., Smirnov, A. N., Bogdanov, A. A., Merz, J. L., Kapaldo, J., Gocalinska, A., Juska, G., Moroni, S. T., Pelucchi, E., Barettin, D., Rouvimov, S. and Mintairov, A. M. (2017) 'Excitonic lasing of strain-free InP(As) quantum dots in AlInAs microdisk', Applied Physics Letters, 110(12), pp. 121101. doi: 10.1063/1.4979029
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© 2017, The Authors, Published by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Lebedev, D. V., Kulagina, M. M., Troshkov, S. I., Vlasov, A. S., Davydov, V. Y., Smirnov, A. N., Bogdanov, A. A., Merz, J. L., Kapaldo, J., Gocalinska, A., Juska, G., Moroni, S. T., Pelucchi, E., Barettin, D., Rouvimov, S. and Mintairov, A. M. (2017) 'Excitonic lasing of strain-free InP(As) quantum dots in AlInAs microdisk', Applied Physics Letters, 110(12), pp. 121101, and may be found at http://aip.scitation.org/doi/abs/10.1063/1.4979029