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Crack-free femtosecond laser processing of lithium niobate benefited by high substrate temperature
- Source :
- Journal of Applied Physics. 129:063102
- Publication Year :
- 2021
- Publisher :
- AIP Publishing, 2021.
-
Abstract
- Femtosecond lasers (fs-lasers) offer a powerful and advantageous tool for fabricating a very large variety of materials. When processing transparent dielectrics, structural defects, such as cracks and broken edges, are always present, thus restricting the precision of fs-laser processing. In this paper, the formation and suppression mechanism of fs-laser induced structural defects are systematically studied. We demonstrate a novel method to improve the processing precision of lithium niobate (LiNbO 3) by elevating the substrate temperature. A crack-free ablation hole with a smooth edge was fabricated at the substrate temperature of 1000 °C. Our results show that the increase of absorptivity and the suppression of incubation effects are responsible for the high precision processing at a high substrate temperature, which not only inhibits the formation of defects, but also additionally increases the efficiency of fs-laser processing. This work provides a simple method to efficiently suppress the defect formation induced by fs-laser in LiNbO 3 samples, paving the way for a new technique for high precision fs-laser processing.
- Subjects :
- 010302 applied physics
Work (thermodynamics)
Materials science
business.industry
Lithium niobate
General Physics and Astronomy
02 engineering and technology
Substrate (electronics)
Dielectric
Molar absorptivity
Edge (geometry)
021001 nanoscience & nanotechnology
Laser
01 natural sciences
law.invention
chemistry.chemical_compound
chemistry
law
0103 physical sciences
Femtosecond
Optoelectronics
0210 nano-technology
business
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 129
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........91f97dab6c8d52449619f6b88f13d0b3