Abstract
Solar energy is one of the most important sustainable energy sources. In solar energy conversion devices, such as solar cell, due to electron-photon interaction, electrons can be excited from the valence band to the conduction band by absorbing photon energy, and leaving holes in the valence band. If a system has a driving force such as a bias voltage, electron-hole pairs will separate and the system will have photo-current. In order to design solar cell devices, photo-current is the central topic and it has received a lot of attention. Another important phenomenon in solar cell systems is the shot noise, which caused by current-current correlation. It has been proved that even in the DC case, shot noise is a remarkable phenomenon and it will affect current-voltage characteristics in nanoscale devices. Therefore, if we want to design better solar cell system in nanoscale, we not only need to calculate photo-current, but also need to consider shot noise of the system. However, the study of shot noise mainly focuses on non-interacting system, and less attention has been paid on the systems with electron-photon interaction. In my talk, I will first introduce a well-defined method for calculating photo-current and then propose two different approaches to investigate shot noise in mesoscopic systems with electron-photon interaction.
Anyone interested is welcome to attend.