Characterization of Polarization Holographic Gratings Obtained on Azopolymer Thin Films by Digital Holographic Microscopy

Veronica Cazac
Institute of Applied Physics of Moldova, Chisinau, Moldova
Tampere University, Faculty of Information Technology and Communication Sciences, Finland

Constantin Loshmanschii
Institute of Applied Physics of Moldova, Chisinau, Moldova

Elena Achimova
Institute of Applied Physics of Moldova, Chisinau, Moldova

Alexei Meshalkin
Institute of Applied Physics of Moldova, Chisinau, Moldova

Vladimir Abashkin
Institute of Applied Physics of Moldova, Chisinau, Moldova

Vladimir Podlipnov (Login required)
Samara National Research University, Russia

Paper #3433 received 25 May 2021; revised manuscript received 25 Sep 2021; accepted for publication 25 Sep 2021; published online 30 Sep 2021.

DOI: 10.18287/JBPE21.07.030306


Polarization diffraction gratings are formed by one-step polarization holographic recording in azopolymer thin films. The evolution of the gratings parameters, such as the modulation of diffraction efficiency and relief depth with regard to different exposure dose is analyzed. Phase-shifting digital holographic microscopy is applied for the measurement of the light-induced polarization diffraction gratings. For the accurate hologram acquisition and reconstruction of the complex amplitude transmitted by the gratings, we performed all-optical (without moving components) phase-shifting implemented within in the imaging system of the digital holographic microscope. The experimental measurement results and theoretical predictions were compared and analyzed.


digital holographic microscopy; polarization holographic gratings; image processing; diffraction efficiency; azopolymer; thin films; phase imaging

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