Third-order optical nonlinearity of gold nanoparticle arrays embedded in a BaTiO3 matrix.

Au:BaTiO(3) composite films comprising hexagon-shaped Au nanoparticle arrays covered with BaTiO(3) matrix were fabricated by double-layer nanosphere lithography and pulsed laser deposition technique. The optical nonlinearity of the composite film was determined using the Z-scan technique at a wavelength of 532 nm and a pulse duration of 25 ps. The third-order nonlinear optical susceptibility, chi(3), was found to be 2.9x10(-8) esu, which is comparable with the best values in metal-dielectric films comprising randomly distributed spherical particles but with much higher metal concentrations. The local electric field enhancement in and near the particles was investigated using the dipole discrete approximation method.

[1]  G. Lu,et al.  How the morphology of biochips roughness increases surface-enhanced chemiluminescence , 2007 .

[2]  Zhenghao Chen,et al.  Linear and nonlinear optical properties of Ag nanocluster/BaTiO3 composite films , 2002 .

[3]  S. Maier,et al.  Plasmonics: Localization and guiding of electromagnetic energy in metal/dielectric structures , 2005 .

[4]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[5]  George C. Schatz,et al.  Silver nanoparticle array structures that produce giant enhancements in electromagnetic fields , 2005 .

[6]  G. Lu,et al.  Enhancement of optical nonlinearity in periodic gold nanoparticle arrays , 2006, Nanotechnology.

[7]  E. Purcell,et al.  Scattering and Absorption of Light by Nonspherical Dielectric Grains , 1973 .

[8]  J. M. Ballesteros,et al.  Pulsed laser deposition of Cu:Al2O3 nanocrystal thin films with high third-order optical susceptibility , 1997 .

[9]  R. W. Christy,et al.  Optical Constants of the Noble Metals , 1972 .

[10]  S. Aștilean,et al.  Gold films deposited over regular arrays of polystyrene nanospheres as highly effective SERS substrates from visible to NIR. , 2006, The journal of physical chemistry. B.

[11]  Michael Vollmer,et al.  Optical properties of metal clusters , 1995 .

[12]  R. V. Duyne,et al.  Nanosphere lithography: A materials general fabrication process for periodic particle array surfaces , 1995 .

[13]  E. W. Stryland,et al.  Sensitive Measurement of Optical Nonlinearities Using a Single Beam Special 30th Anniversary Feature , 1990 .

[14]  Zhenghao Chen,et al.  Structural and optical properties of BaTiO3 ultrathin films , 2006 .

[15]  Young S. Choi,et al.  Third-order optical nonlinearities of sol-gel-processed AuSiO2 thin films in the surface plasmon absorption region , 1997 .

[16]  George C. Schatz,et al.  Nanoscale Optical Biosensor : Short Range Distance Dependence of the Localized Surface Plasmon Resonance of Noble Metal Nanoparticles , 2022 .

[17]  Kam Sing Wong,et al.  Large third-order optical nonlinearity in Au:TiO2 composite films measured on a femtosecond time scale , 1998 .

[18]  S. S. Kim,et al.  Third-order optical nonlinearity of Cu nanoparticle-dispersed Ba0.5Sr0.5TiO3 films prepared by alternating pulsed laser deposition , 2006 .

[19]  Don A. Gregory,et al.  Cancellation of photoinduced absorption in metal nanoparticle composites through a counterintuitive consequence of local field effects , 1997 .

[20]  P. Roussignol,et al.  Surface-mediated enhancement of optical phase conjugation in metal colloids. , 1985, Optics letters.

[21]  Satoshi Sasaki,et al.  Optical nonlinearities of Au/SiO2 composite thin films prepared by a sputtering method , 1996 .

[22]  George C. Schatz,et al.  A nanoscale optical biosensor: The long range distance dependence of the localized surface plasmon resonance of noble metal nanoparticles , 2004 .

[23]  Vladimir M. Shalaev,et al.  Resonant Field Enhancements from Metal Nanoparticle Arrays , 2004 .

[24]  Lechner,et al.  Metal nanoparticle gratings: influence of dipolar particle interaction on the plasmon resonance , 2000, Physical review letters.

[25]  Paul F. Liao,et al.  Enhanced fields on rough surfaces: dipolar interactions among particles of sizes exceeding the Rayleigh limit , 1985 .