Fig. 1: Time- and frequency-resolved spectroscopy with correlated photons.
From: Correlated-photon time- and frequency-resolved optical spectroscopy
a Schematic overview of spectral (interference filter on the idler arm) and temporal heralding of fluorescent photons. `TWINS' indicates the Fourier Transform spectrometer used to spectrally resolve the fluorescence. b Experimental setup. LP: long-pass filter; DM: dichroic mirror; PBS: polarizing beam splitter used to select a single input polarization for the TWINS spectrometer; BP: bandpass filter; OBJ: microscope objective; SMF: single-mode fiber; MMF: multi-mode fiber; SPAD: single-photon avalanche diode; TCSPC: time-correlated single photon counting. c Setup for g(2) measurement. d Scheme of the TWINS interferometer. HW: half-waveplate; Plate: α-BBO plate; Wedges: movable α-BBO wedges; Pol: polarizer.
