Coupling Mediated Coherent Control of Localized Surface Plasmon Polaritons

Zeuner, Franziska; Muldarisnur, Mulda; Hildebrandt, Andre; Förstner, Jens; Zentgraf, Thomas

doi:10.1021/acs.nanolett.5b01381

Cited by 17 publications

(15 citation statements)

References 22 publications

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“…Similarly, in Ref. [121] it was shown that THG signal emitted from a threenanorod gold structure can be coherently controlled by changing a relative phase of two different excitation channels. Localized surface plasmon polaritons in the nanorods are excited through near-and far-field couplings to two orthogonally polarized light fields.…”

Section: Plasmonic Nanoparticlesmentioning

confidence: 81%

Multipolar nonlinear nanophotonics

Smirnova

Kivshar

2016

Optica

322

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: 81%

Multipolar nonlinear nanophotonics

Smirnova

Kivshar

2016

Optica

322

282

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“…Furthermore, we showed that the modal interplay occurring in the SHG from plasmonic nanostructures may be used to measure small refractive index changes [45][46][47]. These results can also open interesting directions for the dynamic control of harmonic generations in plasmonic nanostructures based on engineering the relative phase between the different modes [50,51].…”

mentioning

confidence: 72%

“…Since the recorded signal depends upon the experimental configuration of the detection, special care is required to determine the nonlinear conversion rate and to design efficient nonlinear plasmonic nanostructures. Furthermore, we showed that the modal interplay occurring in the SHG from plasmonic nanostructures may be used to measure small refractive index changes. − These results can also open interesting directions for the dynamic control of harmonic generations in plasmonic nanostructures based on engineering the relative phase between the different modes. , …”

mentioning

confidence: 90%

Revealing a Mode Interplay That Controls Second-Harmonic Radiation in Gold Nanoantennas

et al. 2017

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In this work, we investigate the generation of second harmonic light by gold nanorods and demonstrate that the collected nonlinear intensity depends upon a phase interplay between different modes available in the nanostructure. By recording the backward and forward emitted second harmonic signals from nanorods with various lengths, we find that the maximum nonlinear signal emitted in the forward and backward directions is not obtained for the same 2 nanorod length. We confirm the experimental results with the help of full-wave computations done with a surface integral equation method. These observations are explained by the multipolar nature of the second harmonic emission, which emphasizes the role played by the relative phase between the second harmonic modes. Our findings are of a particular importance for the design of plasmonic nanostructures with controllable nonlinear emission and nonlinear plasmonic sensors as well as for the coherent control of harmonic generations in plasmonic nanostructures. Motivated by different specific features, the study of nonlinear optical processes in plasmonic nanostructures has become a vivid field of research [1, 2]. First, the intrinsic nonlinear response of plasmonic materials enables the investigation of subtle nonlinear mechanisms associated with the surface [3, 4], the shape [2], the roughness [5, 6], and the symmetry [2] of plasmonic nanostructures. Second, local field enhancement associated with the plasmon resonances can boost nonlinear processes including second harmonic generation (SHG) [7-9], third harmonic generation [10][11][12], and nonlinear photoluminescence [13][14][15][16], such that these nonlinear signals provide indirect entry to the local field enhancement [17][18][19]. Third, the plasmonic modes associated with a nanostructure are the underlying framework upon which nonlinear processes can be built [20,21]. It is only quite recently that the role played in nonlinear plasmonics by the interaction between the different modes available at the fundamental and harmonic frequencies has been recognized, leading to different multiresonant nanostructure designs that benefit from the interaction of several plasmonic modes at different frequencies [21][22][23][24][25]. This is especially the case for SHG where a dipolar excitation at the fundamental frequency produces a nonlinear signal which is essentially quadrupolar [26].

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“…This suggests a departure from conventional physical limitations in nonlinear optics. Metamaterials with tailored nonlinear responses look set to provide exceptional flexibility in applications such as super-resolution imaging 17 , efficient frequency conversion 18 , optical switching and coherent optical control at the nanoscale 19,20 .…”

Section: Supplementary Informationmentioning

confidence: 99%

The Interplay of Symmetry and Scattering Phase in Second Harmonic Generation from Gold Nanoantennas

et al. 2016

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Nonlinear phenomena are central to modern photonics but, being inherently weak, typically require gradual accumulation over several millimeters. For example, second harmonic generation (SHG) is typically achieved in thick transparent nonlinear crystals by phase-matching energy exchange between light at initial, ω, and final, 2ω, frequencies. Recently, metamaterials imbued with artificial nonlinearity from their constituent nanoantennas have generated excitement by opening the possibility of wavelength-scale nonlinear optics. However, the selection rules of SHG typically prevent dipole emission from simple nanoantennas, which has led to much discussion concerning the best geometries, for example, those breaking centro-symmetry or incorporating resonances at multiple harmonics. In this work, we explore the use of both nanoantenna symmetry and multiple harmonics to control the strength, polarization and radiation pattern of SHG from a variety of antenna configurations incorporating simple resonant elements tuned to light at both ω and 2ω. We use a microscopic description of the scattering strength and phases of these constituent particles, determined by their relative positions, to accurately predict the SHG radiation observed in our experiments. We find that the 2ω particles radiate dipolar SHG by near-field coupling to the ω particle, which radiates SHG as a quadrupole. Consequently, strong linearly polarized dipolar SHG is only possible for noncentro-symmetric antennas that also minimize interference between their dipolar and quadrupolar responses. Metamaterials with such intra-antenna phase and polarization control could enable compact nonlinear photonic nanotechnologies.

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Coupling Mediated Coherent Control of Localized Surface Plasmon Polaritons

Cited by 17 publications

References 22 publications

Multipolar nonlinear nanophotonics

Multipolar nonlinear nanophotonics

Revealing a Mode Interplay That Controls Second-Harmonic Radiation in Gold Nanoantennas

The Interplay of Symmetry and Scattering Phase in Second Harmonic Generation from Gold Nanoantennas

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