Plasmon-Enhanced Second-Harmonic Generation Nanorulers with Ultrahigh Sensitivities

Shen, Shaoxin; Meng, Lingyan; Zhang, Yuejiao; Han, Junbo; Ma, Zongwei; Hu, Shu; He, Yuhan; Li, Jianfeng; Ren, Bin; Shih, Tien-Mo; Wang, Zhaohui; Yang, Zhilin; Zhang, Tian

doi:10.1021/acs.nanolett.5b02569

Cited by 95 publications

(81 citation statements)

References 39 publications

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“…Compared to the metallic split ring resonator that possessing a magnetic dipole, the C‐shaped nanoaperture has much higher local field enhancement at the gap area . The strength of the electric dipole and the resulting field enhancement is substantially increased as the gap size g gets smaller, which can greatly boost the SH emission from the C‐shaped nanoaperture in the electric dipole approximation

P^{false(2 false)} false(2 ω false) = χ^{false(2 false)} : E false(ω false) E false(ω false)

where P (2) (2ω) is the second‐order polarization, E (ω) is the fundamental electric field distribution, and χ (2) is the second‐order nonlinear susceptibility. On the other hand, the outlined area of the C‐shaped nanoaperture is reduced with the decreased gap size in order to maintain the electric dipole resonance unchanged, leading to a lower transmission (Figure S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Spin‐Selective Second‐Harmonic Vortex Beam Generation with Babinet‐Inverted Plasmonic Metasurfaces

Chen

Yang

Gao

2018

Advanced Optical Materials

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in plasmonic metasurfaces. [24] Compared to the conventional quadratic nonlinear optical materials such as ferroelectric crystals, nonlinear plasmonic metasurfaces can continuously control the local phase shift of effective nonlinear polarizability in the entire 2π range with subwavelength resolution for nonlinear wavefront shaping. [14] Among various applications of metasurfaces, the generation of optical vortex beam with helical wavefront carrying orbital angular momentum (OAM) has attracted great interests. [8,11,[25][26][27][28][29] Compared to the conventional bulky optical components used for generating vortex beams, such as spatial light modulator and spiral phase plate, metasurfaces provide a compact and high-resolution approach, which open new avenues for optical particle trapping, [30,31] precision photolithography, [32,33] and remote optical communication. [34,35] Furthermore, the generation of secondharmonic (SH) vortex beams have been recently achieved with both the fork-type and rotation plasmonic metasurfaces, [19,21] but the formed SH vortex beams can only carry OAM of one absolute value and the vortex mode purity is still limited. Besides, the fork-type metasurface demonstrates no spin control over the created SH vortex pair, [19] while the rotation metasurface can only generate one vortex beam with the opposite spin at one time. [21] Moreover, most of the existing nonlinear plasmonic metasurfaces employ metallic nanoantennas as their constitutional meta-atoms, which suffer from strong background transmission, undesired optical scattering, and low laser damage threshold. As a solution, Babinet-inverted plasmonic metasurfaces based on nanoapertures in metallic film as nonlinear meta-atoms have their unique advantages, where the transmission of background illumination and undesired optical scattering can be efficiently suppressed, resulting in a significantly improved signal-to-noise ratio for the nonlinear beam conversion. [36] Meanwhile, the generated Joule heat in Babinetinverted plasmonic metasurfaces under the femtosecond laser illumination can diffuse rapidly across the continuous metallic film with high thermal conductivity, leading to a high laser damage threshold. [37,38] In this work, we present Babinet-inverted plasmonic metasurfaces based on C-shaped nanoapertures for achieving strong SH emission with large nonlinear conversion efficiency and generating spin-selective SH vortex beams with high mode purity. The geometrical parameters of C-shaped nanoapertures, Metasurfaces have drawn considerable attentions for their revolutionary capability of tailoring the amplitude, phase, and polarization of light. By integrating the nonlinear optical processes into metasurfaces, new wavelengths are introduced as an extra degree of freedom for further advancing the device performance. However, most of the existing nonlinear plasmonic metasurfaces are based on metallic nanoantennas as meta-atoms, suffering from strong background transmission, low laser damage threshold and small nonlinear conversion e...

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P^{false(2 false)} false(2 ω false) = χ^{false(2 false)} : E false(ω false) E false(ω false)

Section: Resultsmentioning

confidence: 99%

Spin‐Selective Second‐Harmonic Vortex Beam Generation with Babinet‐Inverted Plasmonic Metasurfaces

Chen

Yang

Gao

2018

Advanced Optical Materials

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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

329

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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“…In a metal nanostructure, the confinement of light energy reaches maximal as the resonance of free electron collective resonance occurs, which is also called localized surface plasmon resonance (LSPR). Thanks to the huge enhanced light energy in some area at metal surface, there are numerous applications of LSPR reported in the past, such as surface enhanced Raman scattering (SERS) 3,4 , LSPR sensor 5,6 , surface catalysis 7,8 , hot electron generation 9,10 , harmonic generation 11,12 , solar cell 13,14 , etc.…”

Section: Introductionmentioning

confidence: 99%

Heterodimer Nanostructures Induced Energy Focusing on Metal Film

Liu¹,

Hao²,

Wan³

et al. 2016

J. Phys. Chem. C

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As an interesting surface plasmon phenomenon discovered several years ago, electromagnetic field redistribution in nanoparticle dimer on film system provides a novel thought to enhance the light power on a plain film which could been widely used in surface enhanced Raman scattering (SERS), solar cells, photo-catalysis, etc. Homodimers on film are mainly investigated in past years, while the properties of heterodimers on film are still unclear. In this work, size difference induced electromagnetic field redistribution in Ag nanoparticle dimer on Au film system is investigated first. The results obtained from finite element method indicate that the smaller nanoparticle has much greater ability to focus light energy on Au film, which even reached more than 5 time compared to the larger one. Further researches indicate that this energy focusing ability has a strong relationship to the wavelength and diameter ration in dimer. Similar focusing phenomenon is found in the system of thick wire-smaller particle on film. Later, the SERS spectra collected in the small nanoparticle-large nanowire system provide an experimental evidence for this theoretic predication. Our results strengthen the understanding of surface plasmon on plane film and have potential application prospects in the surface plasmon related fields.

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Plasmon-Enhanced Second-Harmonic Generation Nanorulers with Ultrahigh Sensitivities

Cited by 95 publications

References 39 publications

Spin‐Selective Second‐Harmonic Vortex Beam Generation with Babinet‐Inverted Plasmonic Metasurfaces

Spin‐Selective Second‐Harmonic Vortex Beam Generation with Babinet‐Inverted Plasmonic Metasurfaces

Multipolar nonlinear nanophotonics

Heterodimer Nanostructures Induced Energy Focusing on Metal Film

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