Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/155174

Title

Mechanism of fine ripple formation on surfaces of (semi) transparent materials via a half-wavelength cavity feedback

Author(s)

Buividas, Ricardas;  Rosa, Lorenzo;  Sliupas, Remigijus;  Kudrius, Tadas;  Slekys, Gintas;  Datsyuk, Vitaly;  Juodkazis, Saulius

Abstract

The mechanism of the fine ripples, perpendicular to laser polarization, on the surface of (semi)transparent materials with period smaller than the vacuum wavelength, λ, of the incident radiation is proposed and experimentally validated. The sphere-to-plane transformation of nanoplasma bubbles responsible for the in-bulk ripples accounts for the fine ripples on the surface of dielectrics and semiconductors. The mechanism is demonstrated for 4H:SiC and sapphire surfaces using 800 nm/150 fs and 1030 nm/300 fs laser pulses. The ripples are pinned to the smallest possible standing wave cavity inside material of refractive index n. This defines the corresponding period, Λ = (λ/n)/2, of a light standing wave with intensity, E2, at the maxima of which surface ablation occurs. The mechanism accounts for the fine ripples at the breakdown conditions. Comparison with ripples recorded on different materials and via other mechanisms using femtosecond pulses is presented and application potential is discussed.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Nanotechnology, Vol. 22, no. 5 (Feb 2011)

Publication year

2011

FOR Code(s)

0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics;  0904 Chemical Engineering;  1007 Nanotechnology

Keyword(s)

Fabrication;  Femtosecond laser pulses;  Nanostructures

Publisher

Institute of Physics Publishing

ISSN

0957-4484

Publisher URL

http://dx.doi.org/10.1088/0957-4484/22/5/055304

Copyright

Copyright © 2011 IOP Publishing Ltd.

Research Projects

Ultrafast photonic hammer: a new strategy to synthesise super dense super hard nanomaterials, Australian Research Council grant number DP0988054

Peer reviewed