8 February 2015 Flexibility properties of type-II InAs/GaSb SL to design MWIR pin photodiodes
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InAs/GaSb superlattice (SL) is a peculiar quantum system for infrared detection, where electrical and optical properties are directly governed by the composition and the periodicity of the InAs/GaSb cell. Indeed, several structures with different InAs to GaSb thickness ratios in each SL period, can target the same cut-off wavelength. Likewise, the type of conductivity of the non-intentionally doped SL structure is also linked to the InAs/GaSb SL period. The objective of this communication is to use the flexibility properties of InAs/GaSb SL to design and then to fabricate by MBE a pin photodiode where the active zone is made of different SL periods. Electrical and electro-optical characterizations are reported. The results show that SL structure for the MWIR domain can be designed by combining the best of each SL periods.
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P. Christol, P. Christol, M. Delmas, M. Delmas, J. B. Rodriguez, J. B. Rodriguez, E. Giard, E. Giard, I. Ribet-Mohamed, I. Ribet-Mohamed, J. Imbert, J. Imbert, S. Derelle, S. Derelle, V. Trinité, V. Trinité, "Flexibility properties of type-II InAs/GaSb SL to design MWIR pin photodiodes", Proc. SPIE 9370, Quantum Sensing and Nanophotonic Devices XII, 93701Z (8 February 2015); doi: 10.1117/12.2076569; https://doi.org/10.1117/12.2076569

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