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Proceedings Paper

Resolution limits of terahertz ptychography
Author(s): Lorenzo Valzania; Erwin Hack; Peter Zolliker; Rolf Brönnimann; Thomas Feurer
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Paper Abstract

We present a study on the resolution limits and resolution factors of terahertz (THz) ptychography. Simulations of a binary amplitude object show that ptychography shares the same intrinsic resolution factors with digital holography, i.e. it is diffraction-limited. Reconstructions of amplitude and phase objects obtained from holographic and ptychographic experiments are comparable. A lateral resolution of around one wavelength λ is achieved on an amplitude object, while a depth resolution of around λ/5 is reported on a weakly diffracting phase object. THz ptychography is expected to complement THz holography for imaging biological samples and THz transparent specimens.

Paper Details

Date Published: 24 May 2018
PDF: 8 pages
Proc. SPIE 10677, Unconventional Optical Imaging, 1067720 (24 May 2018); doi: 10.1117/12.2307157
Show Author Affiliations
Lorenzo Valzania, EMPA (Switzerland)
Erwin Hack, EMPA (Switzerland)
Peter Zolliker, EMPA (Switzerland)
Rolf Brönnimann, EMPA (Switzerland)
Thomas Feurer, Univ. Bern (Switzerland)

Published in SPIE Proceedings Vol. 10677:
Unconventional Optical Imaging
Corinne Fournier; Marc P. Georges; Gabriel Popescu, Editor(s)

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