Electric field control of a quantum dot molecule through optical excitation

摘要

Nonresonant optical excitation of a coupled quantum dot system was seen to generate a shift in thenelectric-field-dependent photoluminescence spectra. By monitoring the interdot recombinationnassociated with an electron and hole in different dots we were able to precisely monitor the internalnelectric field generated. Power, wavelength, and applied field dependence of the charging wasnstudied. Such an optically generated electric field may provide a means for applying local oscillatingnvoltages, allowing for optical tuning of the device parameters. © 2010 American Institute ofnPhysics. u0004doi:10.1063/1.3430506