Anisotropic linear and nonlinear optical properties from anisotropy-controlled metallic nanocomposites
Por:
Reyes-Esqueda J.A., Rodríguez-Iglesias V., Silva-Pereyra, HG, Torres-Torres C., Santiago-Ramirez, AL, Cheang-Wong J.C., Crespo-Sosa A., Rodríguez-Fernández L., López-Suárez A., Oliver A.
Publicada:
20 jul 2009
Categoría:
Atomic and Molecular Physics, and Optics
Resumen:
High-energy metallic ions were implanted in silica matrices, obtaining spherical-like metallic nanoparticles (NPs) after a proper thermal treatment. These NPs were then deformed by irradiation with Si ions, obtaining an anisotropic metallic nanocomposite. An average large birefringence of 0.06 was measured for these materials in the 300-800 nm region. Besides, their third order nonlinear optical response was measured using self-diffraction and P-scan techniques at 532 nm with 26 ps pulses. By adjusting the incident light's polarization and the angular position of the nanocomposite, the measurements could be directly related to, at least, two of the three linear independent components of its third order susceptibility tensor, finding a large, but anisotropic, response of around 10-7 esu with respect to other isotropic metallic systems. For the nonlinear optical absorption, we were able to shift from saturable to reverse saturable absorption depending on probing the Au NP's major or minor axes, respectively. This fact could be related to local field calculations and NP's electronic properties. For the nonlinear optical refraction, we passed from self-focusing to self-defocusing, when changing from Ag to Au. © 2009 Optical Society of America.
Filiaciones:
Reyes-Esqueda J.A.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Rodríguez-Iglesias V.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Silva-Pereyra, HG:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Torres-Torres C.:
Sección de Estudios de Posgrado e Investigación ESIME-Zacatenco, Instituto Politécnico Nacional, México, D.F. 07338, Mexico
Santiago-Ramirez, AL:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Cheang-Wong J.C.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Crespo-Sosa A.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Rodríguez-Fernández L.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
López-Suárez A.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
Oliver A.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 04510, DF, Mexico
All Open Access; Gold
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