Title

Near-infrared femtosecond laser machining initiated by ultraviolet multiphoton ionization

Authors

Authors

X. Yu; Q. Bian; B. Zhao; Z. Chang; P. B. Corkum;S. Lei

Comments

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Abbreviated Journal Title

Appl. Phys. Lett.

Keywords

FUSED-SILICA; MULTIWAVELENGTH EXCITATION; OPTICAL-BREAKDOWN; ABLATION; DIELECTRICS; PULSES; IRRADIATION; ENERGY; QUARTZ; FIELD; Physics, Applied

Abstract

We report on the experimental study of microstructures fabricated on the surface of fused silica by two femtosecond laser pulses, a tightly focused 266 nm beam followed by a loosely focused 800 nm beam. By setting the fluence of each pulse below the damage threshold, visible microstructures are fabricated using the combined beams. Our results suggest that the ultraviolet pulse generates seed electrons through multiphoton absorption, and the near-infrared pulse utilizes these electrons to cause damage by avalanche ionization. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4794946]

Journal Title

Applied Physics Letters

Volume

102

Issue/Number

10

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

4

WOS Identifier

WOS:000316501200011

ISSN

0003-6951

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