Figure 1: The schematic diagram of polarization resolved second harmonic generation four-channel Stokes-polarimeter setup.

The setup was module based. PSG is inserted for the calibration of PSA and was removed afterward. λ/2: half wave-plate, λ/4: quarter wave-plate, S: sample, M: mirror, F: filter, BS: beam splitter, FR: Fresnel rhomb, W1 and W2: Wollaston prism, L: focusing lens, I1, I2, I3, I4: photo-multiplier tubes (PMTs), TCSPC: time correlated single photon counting.