Green functions for photovoltaic response of quantum wire-dot-wire junctions

We investigate the photovoltaic properties of a quantum dot connected to quantum wire reservoirs using numerical calculations within the non-equilibrium Green function formalism. We examine impacts of the hopping parameter that controls each dot-wire contact for a monochromatic light at energy equal to the isolated dot gap. Global current increases when the hopping decreases, following the short-circuit current and the open-circuit voltage.