THG is particularly significant in nanotechnology due to its ability to probe and manipulate nanoscale structures and materials. The high spatial resolution achievable with THG makes it an invaluable tool in nanophotonics and nanomaterials characterization. For example, THG microscopy allows for the imaging of biological tissues and cells without the need for external labels or dyes, providing a non-invasive method for studying biological processes at the nanoscale.
