Development of a Numerical Algorithm for Identifying Single Photon Detection with a Quantum Dot

We present a numerical identification scheme for single photon detection (SPD) using a lateral GaAs Quantum Dot (QD). Trapping and resetting of the photo‐generated single electrons can be sensed by the quantum point contact (QPC) fabricated near the dot. A step‐like increase of the QPC current can be observed after laser pulse irradiation meaning an electron is released from the dot. This increase could only be observed if a photo‐generated electron had been trapped in the dot. We show that our developed scheme successfully identifies SPD and measures computationally the trapping time of the generated electron. This work will allow us to analyze single photon to electron spin conversion in a statistical manner.