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Two-color two-photon Rabi oscillation of biexciton in single InAs/GaAs quantum dot
Institution:1. The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;2. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China;1. Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China;2. Department of Information Science and Electronics Engineering and Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, China;1. Department of Physics and the Department of Electrical and Computer Engineering, University of California at San Diego, La Jolla, CA, 92093, USA;2. Department of Electrical and Computer Engineering, University of California at San Diego, La Jolla, CA, 92093, USA;3. Department of Electrical Engineering, University of Texas at Dallas, Richardson, TX, 75080, USA
Abstract:A two-photon absorption resonance is observed when the sum-frequency of two laser pulses equals the creation energy of a biexciton in a single InAs/GaAs semiconductor quantum dot. Resonant excitation of the two-color two-photon transition results in a coherent oscillation that is remarkably similar to a single-color two-photon Rabi oscillation of the crystal-ground to biexciton optical transition. A model explaining the coherent two-photon absorption is presented.
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