Comparison of electromagnetically induced transparency schemes in semiconductor quantum dot structures: Impact of many-body interactions

Abstract

We investigate the impact of many-body interactions on group-velocity slowdown achieved via electromagnetically induced transparency in quantum dots using three different coupling-probe schemes (ladder, $V$, and $\ensuremath{\Lambda}$, respectively). We find that for all schemes many-body interactions have an important impact on the slow light properties. In the case of the $\ensuremath{\Lambda}$ and $V$ schemes, the minimum required coupling power to achieve slow light is significantly reduced by many-body interactions. $V$ type schemes are found to be generally preferable due to a favorable redistribution of carriers in energy space.