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Quantitative coherent scattering spectra in apertureless terahertz pulse near-field microscopes

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7 Author(s)
Moon, Kiwon ; Department of Electrical and Computer Engineering, POSTECH, Pohang, Kyungbuk 790-784, South Korea ; Youngwoong Do ; Lim, Meehyun ; Gyuseok Lee
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Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.4733475 

We present quantitative coherent measurements of scattering pulses and spectra in terahertz apertureless near-field microscopes. Broadband near-field image contrasts for both amplitude and phase spectra are measured directly from time-domain scattering signals with an unprecedentedly high single-scan signal-to-noise ratio (∼48 dB), with approach curves for both short (<200 nm) and long (up to 82 μm) ranges. By using the line dipole image method, we obtain quantitative broadband THz imaging contrasts with nanoscale resolution.

Published in:

Applied Physics Letters  (Volume:101 ,  Issue: 1 )

Date of Publication:

Jul 2012

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