Beyond intensity modulation: new approaches to pump-probe microscopy

Abstract

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 microscopy that keep the beam intensity constant and instead modulate the inter-pulse time delay, the relative polarization, or the pulse length. These techniques can improve image quality for samples that have poor heat dissipation or long-lived radiative states, and can selectively address nonlinear interactions in the sample. We experimentally demonstrate this approach and point out the advantages over conventional intensity modulation.

References in corpus (2)

• Rapid-scan acousto-optical delay line with 34 kHz scan rate and 15 attosecond precision
• Crossed-beam pump-probe microscopy

Cited by in corpus (2)

• Noninvasive identification of carbon-based black pigments with pump-probe microscopy
• Contrast mechanisms in pump-probe microscopy of melanin