Transversely graded polarization volume gratings fabricated by freeform holographic photoalignment.
Opt Lett
; 49(1): 121-124, 2024 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-38134167
ABSTRACT
Polarization volume gratings (PVGs) based on chiral nematic liquid crystals offer a great potential as polarization-dependent holographic optical elements, but it is not easy to fabricate PVGs with varying pattern periods in the transverse plane. Here, we fabricate a PVG with an in-plane gradient of the pattern period by performing two-beam interference photoalignment on a flexible polyimide substrate. The pattern period varies depending on the local interference angle, which is controlled by the bent shape of the flexible substrate. We demonstrate fabrication of a PVG with a linearly graded sub-micrometer period, showing the potential of the proposed method to fabricate designer PVGs.
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MEDLINE
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En
Ano de publicação:
2024
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Article