Terahertz near-field microscopy based on a collection mode detector

Mitrofanov, O.; Brener, I.; Harel, R.; Wynn, J. D.; Wynn, J.D.; Pfeiffer, L. N.; Pfeiffer, L.N.; West, K. W.; West, K.W.; Federici, J.
November 2000
Applied Physics Letters;11/27/2000, Vol. 77 Issue 22
Academic Journal
We report on the development of a collection mode near-field probe for the terahertz spectral range. The near-field detector is based on an aperture type probe with dimensions of 30x30 μm[sup 2]. The collection mode technique provides higher sensitivity and higher resolution than the similar illumination mode approach. Spatial resolution better than 40 μm is demonstrated for a broad spectrum of 300-600 μm, which equals to λ/15 for the longest wavelength. The observed resolution is determined by the size of the probe aperture. © 2000 American Institute of Physics.


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