Extended Data Fig. 6: Non resonant pumping vs. resonant pumping.
From: Optical control of resonances in temporally symmetry-broken metasurfaces
(a) Pump-probe spectral time trace (720 nm pump with a fluence of 100 µJ/cm2) for a metasurface at the resonance broadening position, where both pump and probe pulses are x-polarized. The SP-BIC at 799 nm shifts by 3.9 nm and exponentially returns to the initial wavelength with a time constant of 20 ps, with minimal changes in resonance amplitude. (b) Same configuration as in (a) but with the pump pulses y-polarized, resonantly pumping Mie 1. The SP-BIC shifts 9.2 nm, and increase in resonance amplitude suggests an increase in γrad due to the experiments being performed in the undercoupled regime.
