Work

Spatial frequency-dependent polarization holography in TI/PMMA photopolymers for high-density storage

Year: 2025

Type: article

Abstract: This study presents a systematic investigation of orthogonal polarization holographic storage in titaniumocene-doped poly (methyl methacrylate) (TI/PMMA) photopolymers, focusing on spatial frequency dependencies (328-3760 lines/mm) and their interplay with holographic performance. By unifying Maxwell’s equations with third-order dielectric tensor analysis, we developed a predictive theoretical framework to resolve the non-monotonic relationship between spatial frequency, diffraction efficiency ( η ), and refractive index modulation (Δ n ). Experimental results demonstrate a maximum Δ n of 1.29 × 10 −4 alongside a stable diffraction efficiency of 42% (1500 lines/mm, 50 ° incident intersection angle) and a record-low response time of 80.2 s at 3760 lines/mm. Notably, the material exhibits exceptional polarization fidelity, with polarization conversion ratios (PCR) exceeding 94% across thicknesses (1-3 mm) and exposure energies (10-30 mW). These findings provide a detailed research foundation for the polarization holographic storage of TI/PMMA polymer materials and offer feasibility and potential for high-density data storage of wavefront phase, polarization, and amplitude information simultaneously in the future.

Source: Optics Express

DOI: 10.1364/oe.562512

Authors: Peng Liu, Feiyang Song, Jingru Ouyang

Language: English

Topic: Photorefractive and Nonlinear Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: National Natural Science Foundation of China

Award: G672963548