Real-time terahertz digital holography with a quantum cascade laser

Scientific Reports
Massimiliano LocatelliPaolo De Natale

Abstract

Coherent imaging in the THz range promises to exploit the peculiar capabilities of these wavelengths to penetrate common materials like plastics, ceramics, paper or clothes with potential breakthroughs in non-destructive inspection and quality control, homeland security and biomedical applications. Up to now, however, THz coherent imaging has been limited by time-consuming raster scanning, point-like detection schemes and by the lack of adequate coherent sources. Here, we demonstrate real-time digital holography (DH) at THz frequencies exploiting the high spectral purity and the mW output power of a quantum cascade laser combined with the high sensitivity and resolution of a microbolometric array. We show that, in a one-shot exposure, phase and amplitude information of whole samples, either in reflection or in transmission, can be recorded. Furthermore, a 200 times reduced sensitivity to mechanical vibrations and a significantly enlarged field of view are observed, as compared to DH in the visible range. These properties of THz DH enable unprecedented holographic recording of real world dynamic scenes.

References

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Citations

May 23, 2020·Nature Communications·Rayko Ivanov StantchevEmma Pickwell-MacPherson
Feb 6, 2017·The Review of Scientific Instruments·Nikita V ChernomyrdinKirill I Zaytsev
May 3, 2018·Optics Express·Daniel M Mittleman
Jun 30, 2019·Optics Express·Maksim KulyaVladimir Katkovnik
Dec 25, 2019·Applied Optics·Artëm T TurovAndrei Gorodetsky
Dec 25, 2019·Applied Optics·Yuchen ZhaoMarc Georges
Aug 1, 2020·Optics Letters·Nikolay V PetrovPatrick Mounaix
Mar 4, 2020·Optics Express·Jie ZhaoWeimin Zhu
Dec 25, 2019·Applied Optics·Lorenzo ValzaniaPeter Zolliker
Nov 25, 2018·Optics Express·M HumphreysD R S Cumming
Jul 3, 2021·Sensors·Gintaras ValušisHartmut G Roskos

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