title: Real-time terahertz near-field microscope.
abstract: We report a terahertz near-field microscope with a high dynamic range that can capture images of a 370 x 740 μm2 area at 35 frames per second. We achieve high spatial resolution (14 μm corresponding to λ/30 for a center frequency at 0.7 THz) on a large area by combining two novel techniques: terahertz generation by tilted-pulse-front excitation and electro-optic balanced imaging detection using a thin crystal. To demonstrate the microscope capability, we reveal the field enhancement at the gap position of a dipole antenna after the irradiation of a terahertz pulse.
authors.affiliation: Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan. blanchard@icems.kyoto-u.ac.jp
authors.forename: F
authors.initials: F
authors.lastname: Blanchard
authors.forename: A
authors.initials: A
authors.lastname: Doi
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
authors.forename: H
authors.initials: H
authors.lastname: Hirori
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
authors.forename: Y
authors.initials: Y
authors.lastname: Kadoya
authors.forename: K
authors.initials: K
authors.lastname: Tanaka
mesh_terms: D003199:Computer Systems; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation*; D008853:Microscopy / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055069:Terahertz Imaging / Q000295:instrumentation*