Fig. 1. (a) Schematic of the setup design showing the analysis of individual NPs using a fs-pulsed NIR laser at 780 nm, where emitted anti-Stokes and scattered light from NPs are detected using VISC and NIRC, respectively. (b) Time traces of photon bursts from a mixture of 500 and 800 nm fluo-PS NPs passing through the laser focus. (c) Scatter plot with distribution histograms of VISC-A and NIRC-A showing separate population of 500 and 800 nm fluo-PS NPs. (d) Time traces of photon bursts from 200 nm fluo-PS NPs for VISC and NIRC seen above the background. (e) Scatter plot with distribution histograms for VISC-A and NIRC-A showing population of 200 nm fluo-PS NPs.