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Femtosecond optical nonlinearities of Au/TiO2 thin films prepared by a sputtering method

Published online by Cambridge University Press:  18 February 2011

Ichiro Tanahashi  and
Akihiro Mito
Ichiro Tanahashi*
Affiliation:
Nanomaterials Microdevices Research Center, Osaka Institute of Technology, Asahi-ku, Osaka 535-8585, Japan
Akihiro Mito
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), NMIJ, Tsukuba, Ibaraki 305-8563, Japan
*
a)Address all correspondence to this author. e-mail: tanahashi@chem.oit.ac.jp
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Abstract

A multitarget sputtering method was applied to embed Au nanoparticles in TiO2 thin films (Au/TiO2 films) with a high concentration of Au particles (19–41 at%). The absolute values of imaginary part of the third-order nonlinear susceptibility, |Im [χ(3)]|, of the Au/TiO2 films, exhibited a peak around the localized surface plasmon resonance absorption peak (around 660 nm), and the maximum value was estimated to be 3.6 × 10−7 esu measured by the femtosecond Z-scan technique. The figure of merit, |Im [χ(3)]|/α, (α is the absorption coefficient of the film at the corresponding wavelength of the measurement) of the film was calculated to be 1.4 × 10−12 esu·cm, which was larger than that of the Au/SiO2 film. This is mainly due to the local field enhancement.

Keywords

AuOptical propertiesSputtering
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 6 , 28 March 2011 , pp. 763 - 769
Copyright
Copyright © Materials Research Society 2011

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References

REFERENCES

1.Ricard, D., Roussignol, P., and Flytzanis, C.: Surface-mediated enhancement of optical phase conjugation in metal colloids. Opt. Lett. 10, 511 (1985).CrossRefGoogle ScholarPubMed
2.Uchida, K., Kaneko, S., Omi, S., Hata, C., Tanji, H., Asahara, Y., Ikushima, A., Tokizaki, T., and Nakamura, A.: Optical nonlinearities of a high concentration of small metal particles dispersed in glass: Copper and silver particles. J. Opt. Soc. Am. B 11, 1236 (1994).CrossRefGoogle Scholar
3.Matsuoka, J., Mizutani, R., Kaneko, S., Nasu, H., Kamiya, K., Kadono, K., Sakaguchi, T., and Miya, M.: Sol-gel processing and optical nonlinearity of gold colloid-doped silica glass. J. Ceram. Soc. Jpn. 101, 53 (1993).CrossRefGoogle Scholar
4.Arnold, G.W. and Borders, J.A.: Aggregation and migration of ion-implanted silver in Lithia-alumina silicate glass. J. Appl. Phys. 48, 1488 (1977).CrossRefGoogle Scholar
5.Tanahashi, I., Yoshida, M., Manabe, Y., Tohda, T., Sasaki, S., Tokizaki, T., and Nakamura, A.: Preparation and femtosecond third-order nonlinear optical properties of Cu/SiO2 composite thin films. Jpn. J. Appl. Phys. 33, 1410 (1994).CrossRefGoogle Scholar
6.Tanahashi, I., Manabe, Y., Tohda, T., Sasaki, S., and Nakamura, A.: Optical properties of Au/SiO2 composite thin films prepared by a sputtering method. J. Appl. Phys. 79, 1244 (1996).CrossRefGoogle Scholar
7.Cui, F., Hua, Z., Wei, C., Li, J., Gao, Z., and Shi, J.: Highly dispersed Au nanoparticles incorporated mesoporous TiO2 thin films with ultrahigh Au content. J. Mater. Chem. 19, 7632 (2009).CrossRefGoogle Scholar
8.Mito, A., Hagimoto, K., and Takahashi, C.: Determination of the third-order optical nonlinear susceptibility of fused silica using optical harmonic generation methods. Nonlinear Opt. 13, 3 (1995).Google Scholar
9.Milam, D.: Measurement of nonlinear refractive-index coefficients using time-resolved interferometry: Application to optical materials for high-power neodymium lasers. Appl. Opt. 37, 546 (1998).CrossRefGoogle Scholar
10.Kreibig, U. and von Fragstein, C.: The limitation of electron mean free path in small silver particles. Z. Phys. 224, 307 (1969).CrossRefGoogle Scholar
11.Kreibig, U.: Anomalous frequency and temperature dependence of the optical absorption of small gold particles. J. Phys. 38, C2 (1977).Google Scholar
12.Sheik, M., Said, A.A., Wei, T.H., Hagan, D.J., and Van Stryland, E.W.: Sensitive measurement of optical nonlinearities using a single beam. IEEE J. Quantum Electron. 26, 760 (1990).CrossRefGoogle Scholar
13.Cheung, Y.M. and Gayen, S.K.: Optical nonlinearities of tea studied by Z-scan and four-wave mixing techniques. J. Opt. Soc. Am. B 11, 636 (1994).CrossRefGoogle Scholar
14.Hamanaka, Y., Nakamura, A., Hayashi, N., and Omi, S.: Dispersion curves of complex third-order optical susceptibilities around the surface plasmon resonance in Ag nanocrystal-glass composites. J. Opt. Soc. Am. B 20, 1227 (2003).CrossRefGoogle Scholar
15.Inouye, H., Tanaka, K., Tanahashi, I., and Hirao, K.: Ultrafast dynamics of nonequilibrium electrons in a gold nanoparticle system. Phys. Rev. B 57, 11334 (1998).CrossRefGoogle Scholar