Stimulated emission does not radiate in a pure dipole pattern.

ABSTRACT: Stimulated Emission (StE) remains relatively unused as an image-forming signal despite having potential advantages over fluorescence in speed, coherence, and ultimately resolution. Several ideas for the radiation pattern and directionality of StE remain prevalent, namely whether a single molecule would radiate StE itself in a pure dipole pattern, or whether its emission direction depends on the driving field. Previous StE imaging has been carried out in transmission, which would collect signal either way. Here, we introduce the StE driving field (the probe) at an angle, using total internal reflection to avoid incident probe light and its specular reflections in our detection path. In this non-collinear detection configuration which also collects some fluorescence from the sample, w

SUBMITTER: Barentine AES 

PROVIDER: S-EPMC10775344 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature