Coherent versus incoherent light scattering from a quantum dot

K. Konthasinghe, J. Walker, M. Peiris, C. K. Shih, Y. Yu, M. F. Li, J. F. He, L. J. Wang, H. Q. Ni, Z. C. Niu, A. Muller
2012 Physical Review B  
We analyze the light scattered by a single InAs quantum dot interacting with a resonant continuous-wave laser. High resolution spectra reveal clear distinctions between coherent and incoherent scattering, with the laser intensity spanning over four orders of magnitude. We find that the fraction of coherently scattered photons can approach unity under sufficiently weak or detuned excitation, ruling out pure dephasing as a relevant decoherence mechanism. We show how spectral diffusion shapes
more » ... ra, correlation functions, and phase-coherence, concealing the ideal radiatively-broadened two-level system described by Mollow.
doi:10.1103/physrevb.85.235315 fatcat:5lumnhhstvfrjaqiiq4aqbcmmy