Open AccessNanoscale heat transfer in direct nanopatterning into gold films by a nanosecond laser pulse
Author(s) -
Yuanhai Lin,
Tianrui Zhai,
Xinping Zhang
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.008396
Subject(s) - materials science , laser , heat transfer , heat flux , nanosecond , nanoscopic scale , laser ablation , colloidal gold , nanotechnology , optics , optoelectronics , nanoparticle , thermodynamics , physics
We investigate nanoscale heat transfer and heat-flux overlapping effects in nanopatterning through interactions between interferogram produced by 5-ns laser pulses at 355 nm and gold films. These mechanisms played different roles in direct writing of gold nanolines with different periods. Continuous gold nanolines were produced for large periods, where heat-flux overlapping is too small to effect the laser-metal interactions. Thus, the heat-transfer distance and direct laser-ablation determined the width of resultant gold nanolines. However, gold nanolines consisting of isolated gold nanoparticles were produced for small periods, where the overlapped heat-flux exceeds the threshold for removing or melting gold films.