Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 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 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.

1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph