: Localized heating that changes the medium's refractive index.
: A third "probe" beam hits this temporary structure and is diffracted, allowing researchers to measure the material's internal dynamics in real-time. Key Applications Laser-Induced Dynamic Gratings | Springer Nature Link Laser-Induced Dynamic Gratings
(LIDGs) are temporary optical structures created when two or more coherent laser beams interfere within a material. Unlike permanent gratings etched into glass, these "transient" patterns exist only while the light is present, making them vital for real-time optical processing. How They Work : Localized heating that changes the medium's refractive
: Two laser beams intersect in a photosensitive medium (solid, liquid, or gas). Laser-Induced Dynamic Gratings
: Spatially varying excitation of atoms or molecules.