NIR Femtosecond Laser Induced Hyper-Rayleigh Scattering and Luminescence from Silver Nanoprisms

Jain, Beena; Srivastava, Arvind K.; Uppal, Abha; Gupta, P. K.; Das, Kaustuv

doi:10.1166/jnn.2010.2462

Cited by 8 publications

(4 citation statements)

References 33 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These nanoparticles are noncentrosymmetric due to their intrinsic threefold symmetry. First hyperpolarizabilities have already been reported , but here, we wish to discuss the signal contribution of shape noncentrosymmetry versus size retardation from an experimental point of view as this has not been performed before. In addition, the question of the presence of nanospheres in non-negligible amounts among the nanoprisms must be addressed.…”

Section: Introductionmentioning

confidence: 99%

Adverse Role of Shape and Size in Second-Harmonic Scattering from Gold Nanoprisms

et al. 2020

View full text Add to dashboard Cite

Gold nanoparticles are widely used in different fields. They are currently under extensive investigation with regard to their linear and nonlinear optical properties. So far, nanoparticles with centrosymmetrical shapes, such as nanospheres or nanorods, have received the main attention. In this work, the properties of gold nanoprisms exhibiting a highly noncentrosymmetrical threefold symmetry are investigated with hyper-Rayleigh scattering (HRS). Aqueous solutions of gold nanospheres and nanoprisms with different sizes were synthesized. The first hyperpolarizability magnitudes of both the nanospheres and nanoprisms were determined separately with the assumption of a surface origin of the nonlinearity. Using polarization-resolved HRS, retardation is shown to be largely underdeveloped for the nanoprisms as opposed to the nanospheres. The nanoprism shape noncentrosymmetry has therefore a leading role in the HRS response although it is also shown that surface defects induce deviations from the ideal threefold symmetry.

show abstract

Section: Introductionmentioning

confidence: 99%

Adverse Role of Shape and Size in Second-Harmonic Scattering from Gold Nanoprisms

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Several groups have reported single particle studies on Ag triangular nanoprisms. ,,,, They have primarily focused on the LSPR position of the scattering or the absorption spectra. , Other studies have focused on fluorescence, luminescence, and higher order multipole plasmons . The effect of tip truncation on Ag nanoprisms was investigated by Sherry et al, who showed that nanoprisms with sharper tips had a red-shifted λ max compared to nanoprisms with more truncated tips.…”

Section: Introductionmentioning

confidence: 99%

LSPR Imaging of Silver Triangular Nanoprisms: Correlating Scattering with Structure Using Electrodynamics for Plasmon Lifetime Analysis

Blaber¹,

et al. 2011

View full text Add to dashboard Cite

Here, an investigation into the optical response of truncated and nontruncated Ag triangular nanoprisms is presented. Single particle darkfield microspectroscopy and transmission electron microscopy (TEM) are performed to obtain an overview of the relationship between plasmonic properties and nanoparticle structure. A general framework is built to describe the optical response (resonant wavelength λmax and full width at half maximum (fwhm)) of triangle nanoprisms in a size regime (60–140 nm edge length) that has not been investigated previously at this level of detail. The discrete dipole approximation is used to infer the thickness of individual nanoprisms from λmax measurements, thereby determining three-dimensional structures derived from two-dimensional TEM images. This additional structural information allowed the various contributions to the fwhm to be deconvoluted and analyzed. It is shown that electron-interface scattering, radiative damping, and bulk damping each make similar contributions to the plasmon width of the triangular prisms for the sizes considered in this work. Surface scattering is found to be seriously overestimated if it is assumed that electron collisions with all prism surfaces lead to dephasing. Reasonable comparisons between theory and experiment are found if it is assumed that only electron collisions involving motions parallel to the plane of the prism lead to dephasing. Substrate effects make a comparatively small contribution to the fwhm. Additionally, it is shown that the optical constants of Johnson and Christy [Phys. Rev. B 1972, 6, 4370] provide the best match to the experimental data. We conclude by presenting the design rules for producing Ag triangular nanoparticles with narrow plasmon resonances.

show abstract

“…But there are very few reports on the determination of β values for nano-triangles in solution. Silver nanoparticles [50][51] display very high nonlinear responses. On the contrary, the hyperpolarizabilities of gold nanoprisms as reported in Ref.…”

Section: Introductionmentioning

confidence: 99%

High Yield Synthesis and Quadratic Nonlinearities of Gold Nanoprisms in Solution: The Role of Corner Sharpness

Ngo

Drobnyh

Sukharev

et al. 2022

Israel Journal of Chemistry

View full text Add to dashboard Cite

Size and shape of noble metal nanoparticles have a major influence on their linear and second order nonlinear properties. Among these nanostructures, acentric objects are expected to display high quadratic nonlinear responses. In this work, a single – step growth of gold nanoprisms (GNPs) was achieved by seedless growth. Their second harmonic response has been investigated experimentally and theoretically with edge length ranging from 40 to 116 nm and for different curvature radii at corners. Their first hyperpolarizabilities β have been measured by Harmonic Light Scattering at 1064 nm. Their calculated and experimental β values are found to display, not only a linear dependence with the surface area as reported for other metallic nanoparticle shapes, but also a strong influence of their corner sharpness on the corresponding nonlinearities. Such high experimental and theoretical β values of GNPs are mainly assigned to the sharpness of tips.

show abstract

NIR Femtosecond Laser Induced Hyper-Rayleigh Scattering and Luminescence from Silver Nanoprisms

Cited by 8 publications

References 33 publications

Adverse Role of Shape and Size in Second-Harmonic Scattering from Gold Nanoprisms

Adverse Role of Shape and Size in Second-Harmonic Scattering from Gold Nanoprisms

LSPR Imaging of Silver Triangular Nanoprisms: Correlating Scattering with Structure Using Electrodynamics for Plasmon Lifetime Analysis

High Yield Synthesis and Quadratic Nonlinearities of Gold Nanoprisms in Solution: The Role of Corner Sharpness

Contact Info

Product

Resources

About