Competitive hybridization in quantum dot-based nanodevices

Katawoura Beltako; Nicolas Cavassilas; Fabienne Michelini

doi:10.1117/12.2212635

14 March 2016 Competitive hybridization in quantum dot-based nanodevices

Katawoura Beltako, Nicolas Cavassilas, Fabienne Michelini

Proceedings Volume 9743, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices V; 97431E (2016) https://doi.org/10.1117/12.2212635
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

By means of nonequilibrium Green's functions using the Born approximation to treat the light-matter coupling, we numerically investigate impacts of competitive hybridization on the photocurrent of a quantum dot based optoelectronic device. The model of device is an absorbing quantum dot connected to two semiconducting electrodes through energy filtering quantum dots. Hybridization occurs between the absorber and the filter, via the inter-dot coupling β, and between the filter and the electrode, via the dot-lead coupling Γ. At the tunnel resonance between the absorber and the filter, the investigation reveals the existence of two operating regimes in the nanodevice characterized by opposite variations of the photocurrent depending on ratio β/ Γ.

Citation Download Citation

Katawoura Beltako, Nicolas Cavassilas, and Fabienne Michelini "Competitive hybridization in quantum dot-based nanodevices", Proc. SPIE 9743, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices V, 97431E (14 March 2016); https://doi.org/10.1117/12.2212635

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