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Title: Effect of laser parameters and assist gas on spectral response of silicon fibrous nanostructure

Abstract

This article report, for the first time, the influence of laser parameters on the spectral response of weblike silicon fibrous nanostructures. These nanostructures are formed by femtosecond laser irradiation at megahertz pulse frequency under atmosphere and nitrogen ambient. The observed decreasing in reflectance is correlated with the density of fibrous nanostructures and the size of the agglomerated nanoparticles. Compared to bulk silicon, Raman spectra of fibrous nanostructures shows a downward shift and asymmetric broadening at the first order phonon peak. The shift and broadening are attributed to phonon confinement of fibrous nanostructure. Polarization and nitrogen gas modify the morphology of generated nanomaterials but does not have effect on light absorptance. Pulsewidth and pulse frequency do not have significant effect on light absorptance.

Authors:
; ;  [1];  [2]
  1. Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3 (Canada)
  2. Department of Aerospace Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3 (Canada)
Publication Date:
OSTI Identifier:
21476616
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 108; Journal Issue: 9; Other Information: DOI: 10.1063/1.3505755; (c) 2010 American Institute of Physics; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; ASYMMETRY; LASER RADIATION; MORPHOLOGY; NANOSTRUCTURES; NITROGEN; PHONONS; POLARIZATION; PULSES; RAMAN SPECTRA; REFLECTIVITY; SEMICONDUCTOR LASERS; SILICON; SPECTRAL REFLECTANCE; SPECTRAL RESPONSE; VISIBLE RADIATION; ELECTROMAGNETIC RADIATION; ELEMENTS; LASERS; NONMETALS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; QUASI PARTICLES; RADIATIONS; SEMICONDUCTOR DEVICES; SEMIMETALS; SOLID STATE LASERS; SPECTRA; SURFACE PROPERTIES

Citation Formats

Mahmood, Abdul Salam, Venkatakrishnan, Krishnan, Alubiady, M, and Tan, Bo. Effect of laser parameters and assist gas on spectral response of silicon fibrous nanostructure. United States: N. p., 2010. Web. doi:10.1063/1.3505755.
Mahmood, Abdul Salam, Venkatakrishnan, Krishnan, Alubiady, M, & Tan, Bo. Effect of laser parameters and assist gas on spectral response of silicon fibrous nanostructure. United States. https://doi.org/10.1063/1.3505755
Mahmood, Abdul Salam, Venkatakrishnan, Krishnan, Alubiady, M, and Tan, Bo. 2010. "Effect of laser parameters and assist gas on spectral response of silicon fibrous nanostructure". United States. https://doi.org/10.1063/1.3505755.
@article{osti_21476616,
title = {Effect of laser parameters and assist gas on spectral response of silicon fibrous nanostructure},
author = {Mahmood, Abdul Salam and Venkatakrishnan, Krishnan and Alubiady, M and Tan, Bo},
abstractNote = {This article report, for the first time, the influence of laser parameters on the spectral response of weblike silicon fibrous nanostructures. These nanostructures are formed by femtosecond laser irradiation at megahertz pulse frequency under atmosphere and nitrogen ambient. The observed decreasing in reflectance is correlated with the density of fibrous nanostructures and the size of the agglomerated nanoparticles. Compared to bulk silicon, Raman spectra of fibrous nanostructures shows a downward shift and asymmetric broadening at the first order phonon peak. The shift and broadening are attributed to phonon confinement of fibrous nanostructure. Polarization and nitrogen gas modify the morphology of generated nanomaterials but does not have effect on light absorptance. Pulsewidth and pulse frequency do not have significant effect on light absorptance.},
doi = {10.1063/1.3505755},
url = {https://www.osti.gov/biblio/21476616}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 108,
place = {United States},
year = {Mon Nov 15 00:00:00 EST 2010},
month = {Mon Nov 15 00:00:00 EST 2010}
}