Beyond intensity modulation: new approaches to pump-probe microscopy

Pump-probe microscopy is an emerging nonlinear imaging technique based on high repetition rate lasers and fast intensity modulation. Here, we present new methods for pump-probe that keep the beam constant instead modulate inter-pulse time delay or relative polarization. These techniques can improve image quality samples have poor heat dissipation long-lived radiative states selectively address interactions in sample. We experimentally demonstrate this approach point out advantages over conventional