High-quality, high-resolution nano-optical images can be generated for characterization of a wide range of optical phenomena, such as graphene plamonics and surface phonon polaritons in hexagonal boron nitride (hBN), and chemical imaging of biological and other organic samples.
Left, Near-field optical images using a spatio-spectral scan shows a complete surface phonon polariton frequency response on a hBN flake across a 200 cm-1 range, with 3 cm-1 spectral resolution, and 10 cm-1 imaging step resolution. 1.5x1.5 µm with 10 nm pixel resolution.