Universal threshold for femtosecond laser ablation with oblique illumination
AffiliationUniv Arizona, Coll Opt Sci
MetadataShow full item record
PublisherAMER INST PHYSICS
CitationUniversal threshold for femtosecond laser ablation with oblique illumination 2016, 109 (16):161604 Applied Physics Letters
JournalApplied Physics Letters
RightsPublished by AIP Publishing.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractWe quantify the dependence of the single-shot ablation threshold on the angle of incidence and polarization of a femtosecond laser beam, for three dissimilar solid-state materials: a metal, a dielectric, and a semiconductor. Using the constant, linear value of the index of refraction, we calculate the laser fluence transmitted through the air-material interface at the point of ablation threshold. We show that, in spite of the highly nonlinear ionization dynamics involved in the ablation process, the so defined transmitted threshold fluence is universally independent of the angle of incidence and polarization of the laser beam for all three material types. We suggest that angular dependence of ablation threshold can be utilized for profiling fluence distributions in ultra-intense femtosecond laser beams. Published by AIP Publishing.
NoteFull Published Online: October 2016; 12 Month Embargo.
VersionFinal published version
SponsorsUnited States Air Force Office of Scientific Research [FA9550-12-1-0482, FA9550-16-1-0013]; U.S. Defense Threat Reduction Agency under program HDTRA [1-14-1-0009]; National Natural Science Foundation of China [11404335, 91538113]