TY - JOUR
T1 - Anisotropic linear and nonlinear optical properties from anisotropy-controlled metallic nanocomposites
AU - Reyes-Esqueda, Jorge Alejandro
AU - Rodríguez-Iglesias, Vladimir
AU - Silva-Pereyra, Héctor Gabriel
AU - Torres-Torres, Carlos
AU - Santiago-Ramírez, Ana Laura
AU - Cheang-Wong, Juan Carlos
AU - Crespo-Sosa, Alejandro
AU - Rodríguez-Fernández, Luis
AU - López-Suárez, Alejandra
AU - Oliver, Alicia
PY - 2009/7/20
Y1 - 2009/7/20
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=67749106292&partnerID=8YFLogxK
U2 - 10.1364/OE.17.012849
DO - 10.1364/OE.17.012849
M3 - Artículo
SN - 1094-4087
VL - 17
SP - 12849
EP - 12868
JO - Optics Express
JF - Optics Express
IS - 15
ER -