Two-photon photoluminescence excitation spectroscopy of single quantum dots
Two-photon photoluminescence excitation spectroscopy of single quantum dots
We present experimental and theoretical study of single semiconductor quantum dots excited by two non-degenerate, resonantly tuned variably polarized lasers. The first laser is tuned to excitonic resonances. Depending on its polarization it photogenerates a coherent single exciton state. The second laser is tuned to biexciton resonances. By scanning the …