Ultrafast laser-inscribed nanogratings in sapphire for geometric phase elements
We systematically studied femtosecond laser-inscribed self-organized nanogratings and geometric phase elements such as a polarization diffraction focusing lens and Q-plate in sapphire crystal. Besides the void structures observed in the focus, nanogratings with periods of 150~300 nm were observed, depending on a nanoslit that took the role of a seeding effect by localized light field enhancement. The non-polarized refractive index change and birefringence were measured with values around 1∼2×10-3 and 6×10-4, respectively. Based on the laser-inscribed form birefringence, a geometric phase lens and Q-plate were successfully demonstrated in sapphire with high imaging and a focusing effect. We expect that our findings may promote the understanding of laser-induced nanogratings in bulk and potential applications in geometric phase elements.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:46 |
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| Enthalten in: |
Optics letters - 46(2021), 3 vom: 01. Feb., Seite 536-539 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Xu, Shuai [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Revised 03.02.2021 published: Print Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1364/OL.413177 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM320893731 |
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| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a We systematically studied femtosecond laser-inscribed self-organized nanogratings and geometric phase elements such as a polarization diffraction focusing lens and Q-plate in sapphire crystal. Besides the void structures observed in the focus, nanogratings with periods of 150~300 nm were observed, depending on a nanoslit that took the role of a seeding effect by localized light field enhancement. The non-polarized refractive index change and birefringence were measured with values around 1∼2×10-3 and 6×10-4, respectively. Based on the laser-inscribed form birefringence, a geometric phase lens and Q-plate were successfully demonstrated in sapphire with high imaging and a focusing effect. We expect that our findings may promote the understanding of laser-induced nanogratings in bulk and potential applications in geometric phase elements | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Fan, Hua |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Zhen-Ze |e verfasserin |4 aut | |
| 700 | 1 | |a Hua, Jian-Guan |e verfasserin |4 aut | |
| 700 | 1 | |a Yu, Yan-Hao |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Lei |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Qi-Dai |e verfasserin |4 aut | |
| 700 | 1 | |a Sun, Hong-Bo |e verfasserin |4 aut | |
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