What Techniques are Used in Sub Wavelength Imaging?
Several innovative techniques have been developed for sub wavelength imaging:
Near-Field Scanning Optical Microscopy (NSOM): This technique involves scanning a very fine probe tip close to the sample surface to capture high-resolution images. Super-Resolution Fluorescence Microscopy: Methods like STED, PALM, and STORM utilize fluorescent molecules and specialized illumination patterns to surpass the diffraction limit. Plasmonic Imaging: Leveraging the properties of surface plasmons, this method enhances the resolution by confining light to very small regions. Structured Illumination Microscopy (SIM): By using patterned light, SIM can reconstruct high-resolution images beyond the diffraction limit. Electron Microscopy: Techniques like SEM and TEM use electron beams, which have much shorter wavelengths than visible light, to achieve sub-nanometer resolution.
