Muller A, Flagg E B, Bianucci P, Wang X Y, Deppe D G, Ma W, Zhang J, Salamo G J, Xiao M, Shih C K
Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.
Phys Rev Lett. 2007 Nov 2;99(18):187402. doi: 10.1103/PhysRevLett.99.187402. Epub 2007 Nov 1.
We show that resonance fluorescence, i.e., the resonant emission of a coherently driven two-level system, can be realized with a semiconductor quantum dot. The dot is embedded in a planar optical microcavity and excited in a waveguide mode so as to discriminate its emission from residual laser scattering. The transition from the weak to the strong excitation regime is characterized by the emergence of oscillations in the first-order correlation function of the fluorescence, g(tau), as measured by interferometry. The measurements correspond to a Mollow triplet with a Rabi splitting of up to 13.3 microeV. Second-order correlation measurements further confirm nonclassical light emission.
我们证明，共振荧光，即相干驱动二能级系统的共振发射，可以用半导体量子点来实现。该量子点嵌入平面光学微腔中，并以波导模式进行激发，以便将其发射与残余激光散射区分开来。从弱激发态到强激发态的转变，其特征在于通过干涉测量法测得的荧光一阶关联函数(g(τ))中出现振荡。这些测量结果对应于一个拉比分裂高达13.3微电子伏特的莫洛三重态。二阶关联测量进一步证实了非经典光发射。
