Apertureless terahtertz near-field microscopy

Terahertz near-field microscopy may serve as a novel tool to measure the high-frequency permittivity of dielectric surfaces on submicrometre semiconductor structures. We present an apertureless THz near-field microscope, which allows for spatial resolutions as small as 150 nm. A new model has been developed that considers the field coupling the scanning probe with a sample and reproduces the image data qualitatively and quantitatively.