Paper Title:
Highly Porous Silica Nanoaerogels for Ultrafast Nonlinear Optical Applications
  Abstract

Highly porous silica nanoaerogels with low apparent density of ~0.1 g/cm3 and ~0.07 g/cm3 were synthesized through two-step sol-gel processing and low temperature supercritical fluid drying. The nonlinear refraction (γ) of silica nanoaerogels was estimated to be ~ -3.4 x 10-16 m2/W for ~0.1 g/cm3 and ~0.07 g/cm3 apparent densities with a signal-beam femtosecond z-scan spectroscopy. The third-order nonlinear refraction coefficient of nanostructure silica nanoaerogels was almost four orders larger than that of bulk silica materials. The large nonlinearrefraction with high nonlinear figure of merit (γ/βλ, β~2×10-10 m/W for 0.07 g/cm3 apparent density, β~6×10-10 m/W for 0.1 g/cm3 apparent density, λ~0.775 µm) is an ideal optical property for nonlinear applications of homeland security, battlefield enhancement, and industrial uses.

  Info
Periodical
Edited by
Hai-Doo Kim, Hua-Tay Lin and Michael J. Hoffmann
Pages
352-357
DOI
10.4028/www.scientific.net/KEM.287.352
Citation
J. T. Seo, S.M. Ma, K. Lee, H. Brown, A. Jackson, T. Skyles, N.M. Cubbage, B. Tabibi, K.P. Yoo, S. Y. Kim, S.S. Jung, M. Namkung, "Highly Porous Silica Nanoaerogels for Ultrafast Nonlinear Optical Applications", Key Engineering Materials, Vol. 287, pp. 352-357, 2005
Online since
June 2005
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$32.00
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