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Title: Dynamics of femtosecond laser-induced periodic surface structures on silicon by high spatial and temporal resolution imaging

Abstract

The formation dynamics of periodic ripples induced by femtosecond laser pulses (pulse duration τ = 50 fs and central wavelength λ = 800 nm) are studied by a collinear pump-probe imaging technique with a temporal resolution of 1 ps and a spatial resolution of 440 nm. The ripples with periods close to the laser wavelength begin to appear upon irradiation of two pump pulses at surface defects produced by the prior one. The rudiments of periodic ripples emerge in the initial tens of picoseconds after fs laser irradiation, and the ripple positions keep unmoved until the formation processes complete mainly in a temporal span of 1500 ps. The results suggest that the periodic deposition of laser energy during the interaction between femtosecond laser pulses and sample surface plays a dominant role in the formation of periodic ripples.

Authors:
 [1];  [2]; ; ; ; ;  [1]
  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22273645
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DEPOSITION; LASER RADIATION; PERIODICITY; PULSED IRRADIATION; SILICON; SPATIAL RESOLUTION; SURFACES

Citation Formats

Jia, X., E-mail: jiaxin@sdju.edu.cn, Department of Mathematics and Physics, Shanghai Dianji University, Shanghai 201306, Jia, T. Q., E-mail: tqjia@phy.ecnu.edu.cn, Peng, N. N., Feng, D. H., Zhang, S. A., and Sun, Z. R. Dynamics of femtosecond laser-induced periodic surface structures on silicon by high spatial and temporal resolution imaging. United States: N. p., 2014. Web. doi:10.1063/1.4870445.
Jia, X., E-mail: jiaxin@sdju.edu.cn, Department of Mathematics and Physics, Shanghai Dianji University, Shanghai 201306, Jia, T. Q., E-mail: tqjia@phy.ecnu.edu.cn, Peng, N. N., Feng, D. H., Zhang, S. A., & Sun, Z. R. Dynamics of femtosecond laser-induced periodic surface structures on silicon by high spatial and temporal resolution imaging. United States. doi:10.1063/1.4870445.
Jia, X., E-mail: jiaxin@sdju.edu.cn, Department of Mathematics and Physics, Shanghai Dianji University, Shanghai 201306, Jia, T. Q., E-mail: tqjia@phy.ecnu.edu.cn, Peng, N. N., Feng, D. H., Zhang, S. A., and Sun, Z. R. 2014. "Dynamics of femtosecond laser-induced periodic surface structures on silicon by high spatial and temporal resolution imaging". United States. doi:10.1063/1.4870445.
@article{osti_22273645,
title = {Dynamics of femtosecond laser-induced periodic surface structures on silicon by high spatial and temporal resolution imaging},
author = {Jia, X., E-mail: jiaxin@sdju.edu.cn and Department of Mathematics and Physics, Shanghai Dianji University, Shanghai 201306 and Jia, T. Q., E-mail: tqjia@phy.ecnu.edu.cn and Peng, N. N. and Feng, D. H. and Zhang, S. A. and Sun, Z. R.},
abstractNote = {The formation dynamics of periodic ripples induced by femtosecond laser pulses (pulse duration τ = 50 fs and central wavelength λ = 800 nm) are studied by a collinear pump-probe imaging technique with a temporal resolution of 1 ps and a spatial resolution of 440 nm. The ripples with periods close to the laser wavelength begin to appear upon irradiation of two pump pulses at surface defects produced by the prior one. The rudiments of periodic ripples emerge in the initial tens of picoseconds after fs laser irradiation, and the ripple positions keep unmoved until the formation processes complete mainly in a temporal span of 1500 ps. The results suggest that the periodic deposition of laser energy during the interaction between femtosecond laser pulses and sample surface plays a dominant role in the formation of periodic ripples.},
doi = {10.1063/1.4870445},
journal = {Journal of Applied Physics},
number = 14,
volume = 115,
place = {United States},
year = 2014,
month = 4
}
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  • The surface morphology of a Niobium sample, irradiated in air by a femtosecond laser with a wavelength of 800 nm and pulse duration of 100 fs, was examined. The period of the micro/nanostructures, parallel and perpendicularly oriented to the linearly polarized fs-laser beam, was studied by means of 2D Fast Fourier Transform analysis. The observed Laser-Induced Periodic Surface Structures (LIPSS) were classified as Low Spatial Frequency LIPSS (periods about 600 nm) and High Spatial Frequency LIPSS, showing a periodicity around 300 nm, both of them perpendicularly oriented to the polarization of the incident laser wave. Moreover, parallel high spatial frequency LIPSS were observedmore » with periods around 100 nm located at the peripheral areas of the laser fingerprint and overwritten on the perpendicular periodic gratings. The results indicate that this method of micro/nanostructuring allows controlling the Niobium grating period by the number of pulses applied, so the scan speed and not the fluence is the key parameter of control. A discussion on the mechanism of the surface topology evolution was also introduced.« less