Inhomogeneities in the nonlinear tensorial responses of arrays of gold nanodots

Canfield, Brian K.; Husu, Hannu; Kontio, Juha; Viheriälä, Jukka; Rytkönen, Tuomo; Niemi, Tapio; Chandler, Eric V.; Hrin, Alex; Squier, Jeff; Kauranen, Martti

doi:10.1088/1367-2630/10/1/013001

Cited by 17 publications

(11 citation statements)

References 17 publications

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“…This choice of bulk nonlinearity provides an SHG response that does not strongly depend on the nanoparticle shape. This is in contrast to other interesting cases of high nonlinearity in metallic nanoparticles or nanostructures, which are not treated here 19, 21, 22. Reported values of CdTe nonlinear coefficients range from 75 to 200 pm V −1 ,23, 24 that is, about one order of magnitude larger than the nonlinear materials cited above.…”

Section: Resultsmentioning

confidence: 56%

Second‐Harmonic Generation from a Single Core/Shell Quantum Dot

Zieliński

Oron

Chauvat

et al. 2009

Small

105

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Nanoparticles emitting two-photon luminescence are broadly used as photostable emitters for nonlinear microscopy. Second-harmonic generation (SHG) as another two-photon mechanism offers complementary optical properties but the reported sizes of nanoparticles are still large, of a few tens of nanometers. Herein, coherent SHG from single core/shell CdTe/CdS nanocrystals with a diameter of 10 to 15 nm is reported. The nanocrystal excitation spectrum reveals resonances in the nonlinear efficiency with an overall maximum at about 970 nm. Polarization analysis of the second-harmonic emission confirms the expected zinc blende symmetry, and allows extraction of the three-dimensional nanocrystal orientation. The small size of these nonlinearly active quantum dots, together with the intrinsic coherence and orientation sensitivity of the SHG process, are well adapted for ultrafast probing of optical near-fields with high resolution as well as for orientation tracking for bioimaging applications.

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Section: Resultsmentioning

confidence: 56%

Second‐Harmonic Generation from a Single Core/Shell Quantum Dot

Zieliński

Oron

Chauvat

et al. 2009

Small

105

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“…Nanoparticles of silver and gold are known to generate HRS under pulsed laser excitation 13 15 the intensity of which depends critically on the shape, size and ordering of the nanostructures; [15][16][17][18][19][20][21][22][23][24] it has also been observed that noncentrosymmetric structures generally show enhanced HRS response. 13 15-21 23-24 Pulsed laser induced non linear processes in two dimensional arrays of metallic nanoparticles can also provide other possibilities like third harmonic generation, multipole excitation etc.…”

Section: Discussionmentioning

confidence: 99%

“…13 15-21 23-24 Pulsed laser induced non linear processes in two dimensional arrays of metallic nanoparticles can also provide other possibilities like third harmonic generation, multipole excitation etc. [18][19][20][21][22] Another nonlinear optical response of these nanostructures under pulsed laser excitation is luminescence. Luminescence has been observed from a variety of silver and gold nanoclusters and like HRS, it has also been shown to be critically dependent upon their size and structure.…”

Section: Discussionmentioning

confidence: 99%

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

Jain

Srivastava²,

Uppal³

et al. 2010

J. Nanosci. Nanotech.

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The nonlinear response of silver nanoprisms (edge length 40 +/- 5 nm and thickness 4.5 +/- 0.5 nm) was studied by exciting with NIR femtosecond pulses (780-880 nm). These nanostructures were observed to generate hyper-Rayleigh scattering (HRS) and broadband luminescence. While HRS showed the expected second order power dependence, the luminescence was observed to follow a third order excitation power dependence. Both HRS and luminescence were observed to be dipolar in nature. The first hyperpolarizability of the nanoprisms was found to be an order of magnitude higher than approximately 15 nm sized nanospheres.

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“…These authors attributed the origin of the measured SHG signal to the nanocylinders surface defects, similarly to the case of small metallic particles dispersed in solutions. 18,19 The modification of the present model to account for this surface defects origin of the SH response is out of the scope of this work since several difficulties can be immediately identified, for instance the calculation of the fundamental and harmonic fields with the adequate cylinder geometry, the lack of knowledge of the surface defects distribution or the lack of account of the field gradient contribution. Despite the cleanliness operation of the lithography procedure for the array fabrication, defects as deviation from the perfect cylindrical shape or surface states due to impurities or other structure defects were observed through a nonvanishing SHG response in the on-axis transmission geometry.…”

Section: A Origin Of the Sh Intensitymentioning

confidence: 99%

On- and off-axis second harmonic generation from an array of gold metallic nanocylinders

Awada

Kessi

Jonin

et al. 2011

Journal of Applied Physics

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Articles you may be interested inPlasmonic coupling effect between two gold nanospheres for efficient second-harmonic generation J. Appl. Phys. 112, 083102 (2012); 10.1063/1.4759051 Second harmonic generation from small gold metallic particles: From the dipolar to the quadrupolar responseThe optical second harmonic (SH) response from gold metallic nanocylinders with diameters of 80 and 120 nm arranged in hexagonal arrays has been determined as a function of the input fundamental polarization angle for the on-and off-axis transmission geometries and crossed output polarization configurations. For the on-axis transmission geometry, the nonlinear response of the nanocylinders is shown to be mainly incoherent, of pure electric dipole nature and arising from the breaking of the centrosymmetric shape of the body of the cylinders in a plane parallel to the substrate surface. Small angle off-axis experiments however show that the coherent contribution to the nonlinear response is size dependent suggesting that, besides the out-of-plane nonlinearity, retardation effects may also play a nonnegligible role.

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Inhomogeneities in the nonlinear tensorial responses of arrays of gold nanodots

Cited by 17 publications

References 17 publications

Second‐Harmonic Generation from a Single Core/Shell Quantum Dot

Second‐Harmonic Generation from a Single Core/Shell Quantum Dot

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

On- and off-axis second harmonic generation from an array of gold metallic nanocylinders

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