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Proceedings Paper

Terahertz near-field microscopy
Author(s): Hou-Tong Chen; Gyu Cheon Cho; Roland Kersting
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Paper Abstract

We report on the development of an apertureless scanning near-field optical microscope for characterization of dielectric properties of nano-structures at terahertz frequencies. A spatial resolution of ≈ 150 nm is achieved, which corresponds to a sub-wavelength factor of ≈1/1000. The imaging mechanism is due to a resonant coupling between light field and the tip-surface system. This allows for image contrasts which exceed those can be expected from Mie scattering by orders of magnitude. Terahertz images of organic and inorganic structures show that the apertureless terahertz microscopy gives insight into the dielectric properties on submicron scale.

Paper Details

Date Published: 29 December 2004
PDF: 12 pages
Proc. SPIE 5593, Nanosensing: Materials and Devices, (29 December 2004); doi: 10.1117/12.571300
Show Author Affiliations
Hou-Tong Chen, Rensselaer Polytechnic Institute (United States)
Gyu Cheon Cho, IMRA America (United States)
Roland Kersting, Univ. of Munich (Germany)

Published in SPIE Proceedings Vol. 5593:
Nanosensing: Materials and Devices
M. Saif Islam; Achyut K. Dutta, Editor(s)

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