Competitive hybridization in quantum dot-based nanodevices

Katawoura Beltako , Nicolas Cavassilas (1) , Fabienne Michelini (1)

1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence

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 beta, and between the filter and the electrode, via the dot-lead coupling Gamma. 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 beta/Gamma.

Domaines: Micro et nanotechnologies/Microélectronique

Katawoura Beltako, Nicolas Cavassilas, Fabienne Michelini. Competitive hybridization in quantum dot-based nanodevices. PHYSICS, SIMULATION, AND PHOTONIC ENGINEERING OF PHOTOVOLTAIC DEVICES V, 2016, Unknown, Unknown Region. ⟨10.1117/12.2212635⟩. ⟨hal-01434977⟩