Programme

O.3 -- Oral, VCTP-44

Date: Monday, 29 July 2019

Time: 11:20 - 11:40

Photovoltaic effect due to asymmetric electron-hole interaction in semiconductor quantum wells

Huynh Thanh Duc (1), Ngo Thanh Cong (1), and Torsten Meier (2)

(1) Ho Chi Minh City Institute of Physics, Vietnam Academy of Science and Technology; (2) Department of Physics, University of Paderborn

We demonstrate the existence of a ballistic photocurrent which results from the excitation of excitons in non-centrosymmetric semiconductor quantum wells. Unlike several other cases, where excitonic effects quantitatively modify photocurrents which originate from single-particle properties, the photocurrent we discuss is a true many-body effect that caused by asymmetric electron-hole attraction. We also show that the coherent dynamics of excitons gives rise to oscillations in the photocurrent transients.

Presenter: Huynh Thanh Duc