Linear and Nonlinear Optical Properties of Aligned Elongated Silver Nanoparticles Embedded in Silica

Rangel-Rojo, R.; Reyes‐Esqueda, Jorge‐Alejandro; Torres-Torres, C.; Oliver, A.; Rodrı́guez-Fernández, L.; Crespo-Sosa, A.; Cheang-Wong, J.C.; McCarthy, John E.; Bookey, Henry T.; Kar, A. K.

doi:10.5772/8514

Cited by 4 publications

(6 citation statements)

References 40 publications

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“…Ensembles of elongated metal nanoparticles embedded in transparent media are of interest due to their intrinsic anisotropy 1 that results in linear and nonlinear dichroism and birefringence 2 3 . Conventionally, such anisotropic glass-metal nanocomposites (GMNs) are fabricated by stretching glass slabs containing spherical nanoparticles 4 .…”

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confidence: 99%

Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser

Chervinskii

Drevinskas

Karpov

et al. 2015

Sci Rep

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We studied a femtosecond laser shaping of silver nanoparticles embedded in soda-lime glass. Comparing experimental absorption spectra with the modeling based on Maxwell Garnett approximation modified for spheroidal inclusions, we obtained the mean aspect ratio of the re-shaped silver nanoparticles as a function of the laser fluence. We demonstrated that under our experimental conditions the spherical shape of silver nanoparticles changed to a prolate spheroid with the aspect ratio as high as 3.5 at the laser fluence of 0.6 J/cm2. The developed approach can be employed to control the anisotropy of the glass-metal composites.

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mentioning

confidence: 99%

Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser

Chervinskii

Drevinskas

Karpov

et al. 2015

Sci Rep

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“…In this case, the transmittance recovers within the pulse length, indicating an ultrafast recovery time. A fit to the data using the expressions 22 that yields the |χ (3) | value, through a comparison with the signal obtained in a reference material CS 2 , under the same experimental conditions, was performed. In Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Because the Kerr signal arises from |χ (3) |, in order to resolve a possible contribution to the measured Kerr signal from nonlinear absorption, we conducted standard pump-probe experiments for quantifying the nonlinear absorption of the samples. From the results, we did not observe any nonlinear absorption even for the highest energies (3 nJ) available from our laser system, and we can therefore safely assume that the nonlinearity is purely refractive.…”

Section: Resultsmentioning

confidence: 99%

“…The non-zero self-diffractive response for orthogonal incident polarization during the ps experiment allow us to indicate that the nonlinear response is purely refractive in origin, while for the ns pulses a thermal effect seems to be the dominant contribution for the nonlinearity of index. The |χ (3) | value for the Au Nps was calculated using the equation, 24 1 ,…”

Section: Time-resolved Optical Kerr Gatementioning

confidence: 99%

“…2 Their ultrafast and sharp third order optical nonlinearities make them very attractive for all-optical photonic applications, since additionally, they exhibit good optical and mechanical stabilities. 3 There have been observed important changes in the nonlinear optical response of metallic NPs given by polarization 4 and pulse duration. 5 On the other hand, the mechanisms of nonlinear optical response of an optical media with metallic NPs apparently depend on the surrounding in different ways; 6 for example, the nonlinear refractive index can be enhanced by the inhibition of the mechanism of absorptive nonlinearity or the interaction of the plasmonic response with the neighborhood.…”

Section: Introductionmentioning

confidence: 99%

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Femto-, pico- and nano-second refractive nonlinearities exhibited by Au nanoparticles

et al. 2011

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Gold nanoparticles (AuNPs) have proven to be powerful tools in various ultrafast photonic, plasmonic and nanomedical applications. Numerous advances in the use of AuNPs include research on their interesting and remarkably fast changes influenced by Surface Plasmon Resonance excitations. Within this work we report theoretical and experimental results for the physical mechanisms that originate a nonlinearity of refractive index during different temporal regimes for a high-purity silica matrix containing Au nanoparticles. The nanocomposites were prepared by ion implantation into a silica matrix, followed by a thermal annealing. We used an optical Kerr gate with 80 fs pulses at 830 nm and a vectorial self-diffraction technique with 26 ps and with 7 ns at 532 nm in order to investigate the magnitude and response time of the resulting third order nonlinearity. In all cases we were able to measure and identify an electronic polarization responsible for the nonlinear refraction. For the pico-and nano-second near resonance irradiations, a contribution of a thermal effect could be stimulated and then the optical Kerr response enhanced. The presence of saturable absorption for the pico-and nano-second experiments was measured. We observe that our samples behave like waveguides in the near infrared spectrum and we estimate that they posses potential applications for all-optical switching devices.

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Energy Transfer in Ion– and Laser–Solid Interactions

Crespo-Sosa¹

2011

Heat Transfer - Engineering Applications

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Linear and Nonlinear Optical Properties of Aligned Elongated Silver Nanoparticles Embedded in Silica

Cited by 4 publications

References 40 publications

Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser

Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser

Femto-, pico- and nano-second refractive nonlinearities exhibited by Au nanoparticles

Energy Transfer in Ion– and Laser–Solid Interactions

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