Resolution limits of terahertz ptychography

Lorenzo Valzania; Erwin Hack; Peter Zolliker; Rolf Brönnimann; Thomas Feurer

doi:10.1117/12.2307157

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24 May 2018 Resolution limits of terahertz ptychography

Lorenzo Valzania; Erwin Hack; Peter Zolliker; Rolf Brönnimann; Thomas Feurer

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Proceedings Volume 10677, Unconventional Optical Imaging; 1067720 (2018) https://doi.org/10.1117/12.2307157
Event: SPIE Photonics Europe, 2018, Strasbourg, France

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.

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Lorenzo Valzania, Erwin Hack, Peter Zolliker, Rolf Brönnimann, and Thomas Feurer "Resolution limits of terahertz ptychography", Proc. SPIE 10677, Unconventional Optical Imaging, 1067720 (24 May 2018); https://doi.org/10.1117/12.2307157

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