MICROWAVE-ASSISTED TRANSPORT THROUGH A QUANTUM-DOT

We present results on microwave-assisted transport through quantum dot s. First, the important energy/frequency scales are discussed. Then, m easurements of the current versus gate voltage characteristics in the presence of microwaves are presented. At finite source-drain bias, mic rowave-induced features are observed, and at zero source-drain bias, a n oscillating photocurrent is observed. A model of photon-assisted tra nsport is discussed that can account for the experimental observations .