Optical properties of hybrid quantum dot/quantum well active region based on GaAs system

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Date
2012
Authors
Thoma, Jiri
Ochalski, Tomasz J.
Hugues, Maxime
Zhang, Shiyong
Hegarty, Stephen P.
Huyet, Guillaume
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AIP Publishing
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Abstract
We experimentally investigate the optical properties of a novel hybrid material/structure consisting of a GaInNAs quantum well and stacked InAs/InGaAs quantum dot layers on GaAs substrate. We demonstrate that the strong quantum confined Stark effect within the quantum well can effectively control well-dot detuning when reverse bias voltage is applied. With a combination of low-and room-temperature time resolved luminescence spectra we infer device absorption recovery time under 30 ps. These properties could be utilized in high-speed optoelectronics devices, in particular electro-absorption modulated lasers and reconfigurable multisection devices, where the hybrid quantum dots - quantum well material system could offer easily and rapidly interchangeable function, i.e., emission gain or variable attenuation, of each section depending on the external bias. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4752279]
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Keywords
Quantum wells , Quantum dots , Photoluminescence , III-V semiconductors , Stark effect
Citation
Thoma, J., Ochalski, T. J., Hugues, M., Zhang, S., Hegarty, S. P. and Huyet, G. (2012) 'Optical properties of hybrid quantum dot/quantum well active region based on GaAs system', Journal of Applied Physics, 112(6), 063103 (4pp). doi: 10.1063/1.4752279
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© 2012, American Institute of Physics. 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 Thoma, J., Ochalski, T. J., Hugues, M., Zhang, S., Hegarty, S. P. and Huyet, G. (2012) 'Optical properties of hybrid quantum dot/quantum well active region based on GaAs system', Journal of Applied Physics, 112(6), 063103 (4pp). doi: 10.1063/1.4752279 and may be found at http://aip.scitation.org/doi/10.1063/1.4752279