Fig. 5: Broadband steady-state and time-resolved full Stokes vector spectroscopy of a standard achiral dye in aqueous solutions with low and high viscosity.
From: Broadband transient full-Stokes luminescence spectroscopy
Structure of rhodamine B is shown at the top right. a–c, Steady-state Stokes vector measurements (excitation 515 nm, 200 fs and 50 kHz) in a low-viscosity environment with horizontal (h) and vertical (v) excitation polarizations to inhibit and induce photoselection effects, respectively. Vertical excitation polarizations correspond to solid lines, and horizontal excitation polarizations to dashed lines. We point out that all spectra overlap in a, and in b and c the dashed lines are all flat about 0. d–f, Time-resolved intensity differences (excitation 515 nm, 200 fs and 50 kHz) over the Stokes polarization basis (normalized to total intensity maximum) in a high-viscosity environment with vertical excitation polarization to induce photoselection. g, Time evolution of all three Stokes components (averaged over a 10 nm range about the emission peak) in low-viscosity and high-viscosity environments with vertical excitation polarization (2 ns time bins and 0.5 ns time steps).
