| Many important excitations on emerging solid state materials and biomacromolecules occur in the terahertz, or extreme infrared, range. Often these novel materials are only available in microscopic samples, with dimensions far below the diffraction limited focus for optical measurements using terahertz light. In order to overcome this diffraction limit we develop near field spectroscopic methods that include polarization sensitivity that provides a contrast mechanism to distinguish specific excitations from a large background. |
