| 报告人简介 |
Chih-Kang (Ken) Shih received his PhD in Applied Physics from Stanford University in 1988. He joined the faculty of the University of Texas at Austin in 1990 as an assistant professor in the Department of Physics, and was later appointed Assistant Professor of Physics. In 2001, he was promoted to the full Professor rank. Since 2004 he has held the Jane and Roland Blumberg Professorship in Physics. Shih is a Fellow of the APS, and he received the 2011 Distinguished Alumni Award from the National Tsing-Hwa University. He has specialized in mesoscopic physics, solid state physics, scanning tunnelling microscopy and spectroscopy, nanoscale optical imaging and spectroscopy, and thin film growth.
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报告摘要 |
Semiconductor nanostructures such as quantum dots (QDs) have offered unique opportunities to investigate sophisticated quantum optical effects in a solid-state system. These include quantum interference, Rabi oscillations [1], as well as photon antibunching, and were previously only observable in isolated atoms or ions. In addition, QDs can be readily integrated into optical microcavities, making them attractive for a number of applications, particularly for quantum information processing and high efficiency quantum light sources. In spite of these tremendous progresses, one area that was little explored was coherently control of solid-state quantum emitters. Successful implementations of such coherent controls will open new applications in quantum information sciences. In this talk I will report our progress toward this endeavor. In particular I will show resonantly controlled light emissions of quantum dots in the cavity [2,3,4], including (a) Nearly ideal fidelity of Rabi flopping using pulse control, (b) direct observation of Mollow triplets in frequency domain, (c) simultaneously measured first-order and second order photon-photon correlations and (d) Direct observation of single-phonon mediated inter-level electronic transition.
[1] H. Htoon et. al., “Interplay of Rabi Oscillations and Quantum Interference in Semiconductor Quantum Dots”, Phys. Rev. Lett., 88, 087401 (2002)
[2] A. Muller et. al., “Resonance Fluorescence from a Coherently Driven Semiconductor Quantum Dot in a Cavity”, Phys. Rev. Lett., 99, 187402 (2007)
[3] E.B. Flagg et. al., “Resonantly driven coherent oscillations in a solid-state quantum emitter”, Nature Physics 5, 203 (2009)
[4] E.B. Flagg et. al., “Direct observation of single-phonon mediated inter-level electronic transition in semiconductor quantum dots”, Phys. Rev. Lett. 102, 097402 (2009)
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