Resolving the Temporal Evolution of Line Broadening in Single Quantum Emitters
Light emission from solid-state quantum emitters is inherently prone to environmental decoherence, which results in a line broadening and in the deterioration of photon indistinguishability . The temporal dynamics of the dephasing mechanisms usually elude established spectroscopy methods, such as μPL and Michelson interferometry, due to relatively long integration times required. Photon correlation Fourier spectroscopy (PCFS)  allows to study the temporal evolution of line broadening in various photonic structures. The time scales we probe range from a few nanoseconds to milliseconds and, simultaneously, the spectral resolution we achieve can be as small as ~2μeV. We discuss the practical implementation of PCFS and the possibility to use it to estimate the indistinguishability of consecutively emitted single photons for applications in quantum communication and photonic-based quantum information processing .
 A. V. Kuhlmann, et al., Nat. Phys. 9, 570–575 (2013)
 X. Brokmann, et al., Opt. Express 14, 6333-6341 (2006)
 D. Huber, et al., Nat. Commun. 8, 15506 (2016)