Terahertz reflective ptychography

[en] As a widely used lensless coherent diffraction imaging approach, ptychography has recently been implemented in Terahertz range. Combining with the unique penetration property of THz radiation, THz ptychography allows inspecting visually opaque samples and retrieving both amplitude and phase information. Here, we demonstrate for the first time to our knowledge, THz ptychography in reflective configuration. Due to the large wavelength (96.5 μm), THz ptychography requires small recording distance. Particular care has been taken in the experimental setup to minimize the recording distance. Extended ptychographic iterative engine (ePIE) is applied to reconstruct quantitatively the amplitude and phase information of the object wavefront. A lateral resolution of 180 μm and a depth resolution of 1.1μm are achieved.

Research center :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Physics

Author, co-author :

Tang, Chao

Zhao, Yuchen ; Université de Liège - ULiège > CSL (Centre Spatial de Liège)

Tan, Fangrui

Wang, Dayong

Rong, Lu

Georges, Marc ; Université de Liège - ULiège > CSL (Centre Spatial de Liège)

Language :

English

Title :

Terahertz reflective ptychography

Publication date :

08 April 2020

Event name :

SPIE Photonics Europe 2020

Event organizer :

The International Society for Optics and Photonics (SPIE)

Event place :

Strasbourg, France

Event date :

29-03-2020 to 02-04-2020

Audience :

International

Main work title :

Unconventional Optical Imaging II

Author, co-author :

Fournier, Corinne

Georges, Marc ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)

Popescu, Gabriel

Collection name :

SPIE Proceedings Vol. 11351

Pages :

1135116

Name of the research project :

TERA4ALL

Funders :

FEDER - Fonds Européen de Développement Régional [BE]

Available on ORBi :

since 25 November 2020

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Bibliography

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