2015/03/27 by Morten P. Bakker, Bakker, Morten P., Thomas Ruytenberg +11
Computer Science · Engineering · Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Neural Networks and Reservoir Computing #Quantum Physics (quant-ph) #Semiconductor Lasers and Optical Devices #Semiconductor Quantum Structures and Devices
paper · pdf · doi:10.48550/arxiv.1503.08142
openalex publication_date 2015/03/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In an oxide apertured quantum dot (QD) micropillar cavity-QED system, we\nfound strong QD hysteresis effects and lineshape modifications even at very low\nintensities corresponding to less than 0.001 intracavity photons. We attribute\nthis to the excitation of charges by the intracavity field; charges that get\ntrapped at the oxide aperture, where they screen the internal electric field\nand blueshift the QD transition. This in turn strongly modulates light\nabsorption by cavity QED effects, eventually leading to the observed hysteresis\nand lineshape modifications. The cavity also enables us to observe the QD\ndynamics in real time, and all experimental data agrees well with a power-law\ncharging model. This effect can serve as a novel tuning mechanism for quantum\ndots.\n