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Updated: Jun 12, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
Published on: September 25, 2020
Polarization holographic recording in amorphous polymer with photoinduced linear and circular birefringence
Gabriella Cipparrone1, Pasquale Pagliusi, Clementina Provenzano
1IPCF-CNR, UOS Cosenza, Excellence Centre CEMIF.CAL and Physics Department, University of Calabria, Ponte P. Bucci, Cubo 33B, 87036 Rende-CS, Italy. gabriella.cipparrone@fis.unical.it
Abstract:
Polarization grating recording in an amorphous and nonchiral azo copolymer has been investigated. The reported study shows that the amorphous polymeric film undergoes a light-guided inhomogeneous supramolecular modification as a consequence of the illumination with proper polarized light patterns, acquiring new functionalities. Both linear and circular, spatially modulated, photoinduced birefringences occur, attaining their peak values in the linearly and circularly polarized regions of the light pattern, respectively. The photoinduced anisotropic structures strongly affect the polarization state of the light propagating through them, and the characterization of their optical diffraction enables measurement of the amplitude of the linear and circular birefringences. The recorded gratings show long-time stability and full reconfigurability functional to the multiple holographic recording.
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