The origin of second harmonic generation hotspots in chiral optical metamaterials

Valev, Ventsislav K.; Silhanek, Alejandro; Zheng, Xuezhi; Volskiy, Vladimir; Biris, Claudiu G.; Panoiu, Nicolae C.; Clercq, Ben De; Ameloot, Marcel; Aktsipetrov, O. A.; Vandenbosch, Guy A. E.; Moshchalkov, Victor; Verbiest, Thierry

doi:10.1109/cleoe.2011.5942652

Cited by 9 publications

(10 citation statements)

References 5 publications

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“…Being the simplest nonlinear optical process, SHG was intensively studied in various plasmonic structures of different shapes and coupling [137,[139][140][141][142][143], chiral [144][145][146] and Fano-resonant geometries [147,148]. Based on near-and far-field radiation properties, specific designs have been suggested for applications in sensing [102,149], shape chracterization [150], nonlinear nanorulers [151,152] and nonlinear microscopy [153].…”

Section: Plasmonic Nanoparticlesmentioning

confidence: 99%

Multipolar nonlinear nanophotonics

Smirnova

Kivshar

2016

Optica

313

282

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Nonlinear nanophotonics is a rapidly developing field with many useful applications for a design of nonlinear nanoantennas, light sources, nanolasers, sensors, and ultrafast miniature metadevices. A tight confinement of the local electromagnetic fields in resonant photonic nanostructures can boost nonlinear optical effects, thus offering versatile opportunities for subwavelength control of light. To achieve the desired functionalities, it is essential to gain flexible control over the near-and far-field properties of nanostructures. Thus, both modal and multipolar analyses are widely exploited for engineering nonlinear scattering from resonant nanoscale elements, in particular for enhancing the near-field interaction, tailoring the far-field multipolar interference, and optimization of the radiation directionality. Here, we review the recent advances in this recently emerged research field ranging from metallic structures exhibiting localized plasmonic resonances to hybrid metal-dielectric and alldielectric nanostructures driven by Mie-type multipolar resonances and optically-induced magnetic response.

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Section: Plasmonic Nanoparticlesmentioning

confidence: 99%

Multipolar nonlinear nanophotonics

Smirnova

Kivshar

2016

Optica

313

282

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“…The SHG from periodic arrays of metallic nanoparticles and metamaterials has been widely studied in the past [14][15][16][17][18][19]22]. In particular, Kauranen et al recently demonstrated that the nonlinear optical response of L-shaped nanoparticle arrays strongly depend on the ordering of the constituting nanoparticles [22].…”

Section: B Second-harmonic Generation From L-shaped Gold Nanoparticlmentioning

confidence: 99%

“…Among the different nonlinear parametric optical phenomena, optical second-harmonic generation (SHG), the optical process whereby two photons at the fundamental wavelength are converted into one photon at the secondharmonic (SH) wavelength, is probably the most studied in plasmonic nanostructures . Experimental data report the SHG from assemblies [3,4] and single spherical metallic nanoparticles [5], noncentrosymmetric nanocups [6], optical nanoantennas [7][8][9], split-ring resonators [10], plasmonic metamolecules [11], metallic nanotips [12,13], periodic arrays of nanodots [14], L-shaped [15,16] and G-shaped [17,18] gold nanoparticle periodic arrays, as well as aperiodic arrays of nanoparticles [14,19]. It was recently demonstrated that SHG is a very efficient tool for the optical characterization of metallic nanoobjects [20,21] and that it is also sensitive to the nanoparticle's spatial distribution [22].…”

Section: Introductionmentioning

confidence: 99%

Second-harmonic generation from periodic arrays of arbitrary shape plasmonic nanostructures: a surface integral approach

et al. 2013

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A surface integral formulation for the second-harmonic generation (SHG) from periodic metallic-dielectric nanostructures is described. This method requires the discretization of the scatterers' surface in the unit cell only. All the physical quantities involved in this problem are derived in the unit cell by applying specific periodic boundary conditions both at the fundamental and the second-harmonic (SH) frequencies. Both the fundamental and the SH electric fields are computed using the method of moments and periodic Green's function evaluated with the Ewald's method. The accuracy of the method is carefully assessed using two specific cases, namely the surface plasmon enhancement of SHG from a gold film and the SHG from L-shaped nanoparticle arrays. These two examples emphasize the accuracy and versatility of the proposed method, which can be applied to a broad range of periodic metallic structures, including plasmonic arrays on arbitrary substrates and metamaterials.

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“…The SHG process is also highly sensitive to externally applied electric [10] or magnetic [11,12] dc fields; though care should be taken while estimating the latter [13]. When combined with microscopy, SHG can successfully image ferroelectric [14] and ferromagnetic [15] domains, as well as local field enhancements [16][17][18]. One of the main sources of local field enhancements is attributable to surface plasmon resonances, or "plasmons".…”

Section: Introductionmentioning

confidence: 99%

The role of chiral local field enhancements below the resolution limit of Second Harmonic Generation microscopy

Valev¹,

Clercq²,

Zheng³

et al. 2011

Opt. Express

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Abstract:While it has been demonstrated that, above its resolution limit, Second Harmonic Generation (SHG) microscopy can map chiral local field enhancements, below that limit, structural defects were found to play a major role. Here we show that, even below the resolution limit, the contributions from chiral local field enhancements to the SHG signal can dominate over those by structural defects. We report highly homogeneous SHG micrographs of star-shaped gold nanostructures, where the SHG circular dichroism effect is clearly visible from virtually every single nanostructure. Most likely, size and geometry determine the dominant contributions to the SHG signal in nanostructured systems. References and links1. J. B. Pendry, "A chiral route to negative refraction," Science 306(5700), 1353-1355 (2004 1983-1986 (1983). 7. T. Petralli-Mallow, T. M. Wong, J. D. Byers, H. I. Yee, and J. M. Hicks, "Circular dichroism spectroscopy at interfaces: a surface second harmonic generation study," J. Phys. Chem. 97(7), 1383-1388 (1993). 8. P. Fischer and F. Hache, "Nonlinear optical spectroscopy of chiral molecules," Chirality 17(8), 421-437 (2005).

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The origin of second harmonic generation hotspots in chiral optical metamaterials

Cited by 9 publications

References 5 publications

Multipolar nonlinear nanophotonics

Multipolar nonlinear nanophotonics

Second-harmonic generation from periodic arrays of arbitrary shape plasmonic nanostructures: a surface integral approach

The role of chiral local field enhancements below the resolution limit of Second Harmonic Generation microscopy

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