Journal
PHOTONICS
Volume 10, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/photonics10050582
Keywords
lithium niobate; uniaxial birefringent crystal; femtosecond laser pulses; direct laser writing; Gaussian beam focusing; nonlinear optical interaction
Categories
Ask authors/readers for more resources
Double-track microstructures were induced in a z-cut lithium niobate crystal using 1030nm 240fs ultrashort laser pulses. The topography of the microstructures was characterized using atomic force microscopy in piezoelectric response mode. The spatial positions of laser-induced modification regions inside the crystal could be predicted using simple analytical expressions.
Double-track microstructures were induced in the bulk of a z-cut lithium niobate crystal by 1030 nm 240 fs ultrashort laser pulses with a repetition rate of 100 kHz at variable pulse energies exceeding the critical Kerr self-focusing power. The microstructure topography was characterized by atomic force microscopy in piezoelectric response mode. The spatial positions of laser-induced modification regions inside lithium niobate in the case of laser beam propagation along the crystal optical axis can be directly predicted by simple analytical expressions under the paraxial approximation. A dimensional analysis of the morphology of the double-track structures revealed that both their length and width exhibit a monotonous increase with the pulse energy. The presented results have important implications for direct laser writing technology in crystalline dielectric birefringent materials, paving the way to control the high spatial resolution by means of effective energy deposition in modified regions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available