2012/11/23 by A. Gonzalez-Tudela, Alejandro Gonzalez-Tudela, F. P. Laussy +7 · 5 citations
Engineering · Physics and Astronomy · #Coupling (piping) #Harmonic #Harmonic oscillator #Laser linewidth #Limiting #Nonlinear Optical Materials Studies #Nonlinear Photonic Systems #Nonlinear system #Quantum #Spectral line #Strong Light-Matter Interactions #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1088/1367-2630/15/3/033036
published as New J. Phys. 15, 033036 (2013) · 27 pages, 8 figures
arxiv created 2012/11/23 · openalex publication_date 2013/03/22 · arxiv updated 2014/03/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We apply our recently developed theory of frequency-filtered and time-resolved N -photon correlations (del Valle et al 2012 Phys. Rev. Lett. 109 183601) to study the two-photon spectra of a variety of systems of increasing complexity: single-mode emitters with two limiting statistics (one harmonic oscillator or a two-level system) and the various combinations that arise from their coupling. We consider both the linear and nonlinear regimes under incoherent excitation. We find that even the simplest systems display a rich dynamics of emission, not accessible by simple single-photon spectroscopy. In the strong coupling regime, two-photon emission processes involving virtual states are revealed. Furthermore, two general results are unravelled by two-photon correlations with narrow linewidth detectors: (i) filtering-induced bunching and (ii) breakdown of the semi-classical theory. We show how to overcome the latter in a fully quantized picture.