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2 February 2012 Utilizing nonlinear optical properties of nanoparticles for imaging and sensing
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Nonlinear optical properties of barium titanate (BaTiO3) nanoparticles are investigated as a function of size and shape. BaTiO3 is an attractive option as a nonlinear material because it can exhibit a high second and third order electronic susceptibility even at the nanoscale. These particles are employed as contrast agents/biomarkers and phase conjugate nanomirrors in imaging, utilizing second harmonic generation for two-photon microscopy and four-wave mixing for three-photon microscopy and scattering reversal image enhancement. Silver is also used to create a shell around the BaTiO3 nanoparticle to see if a core/shell structure enhances any of the nonlinear effects.
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Brian G. Yust, Neema Razavi, Francisco Pedraza, and Dhiraj K. Sardar "Utilizing nonlinear optical properties of nanoparticles for imaging and sensing", Proc. SPIE 8231, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications VIII, 82310H (2 February 2012);

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