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Laser-Inscribed stress-induced birefringence of sapphire

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posted on 2024-08-06, 12:05 authored by Hua Fan, Meguya Ryu, Reo Honda, Junko Morikawa, Zhen Ze Li, Lei Wang, Jovan Maksimovic, Saulius JuodkazisSaulius Juodkazis, Qi Dai Chen, Hong Bo Sun
Birefringence of 3×10-3 is demonstrated inside cross-sectional regions of 100 µm, inscribed by axially stretched Bessel-beam-like fs-laser pulses along the c-axis inside sapphire. A high birefringence and retardance of λ/4 at mid-visible spectral range (green) can be achieved using stretched beams with axial extension of 30–40 µm. Chosen conditions of laser-writing ensure that there are no formations of self-organized nano-gratings. This method can be adopted for creation of polarization optical elements and fabrication of spatially varying birefringent patterns for optical vortex generation.

Funding

Photonic crystals: The key to breaking the silicon-solar cell efficiency barrier

Australian Research Council

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Non-equilibrium material phases

Australian Research Council

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ISSN

2079-4991

Journal title

Nanomaterials

Volume

9

Issue

10

Article number

article no. 1414

Pagination

1414-

Publisher

MDPI AG

Copyright statement

Copyright © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Language

eng

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