Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays

Lindén, Stefan; Niesler, Fabian; Förstner, Jens; Grynko, Yevgen; Meier, Torsten; Wegener, Martin

doi:10.1103/physrevlett.109.015502

Cited by 175 publications

(150 citation statements)

References 24 publications

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“…This leads to the observed THz emission in the far field perpendicular to the SRR gap (green line). It should be noted that, although this mechanism also works for the SHG reported previously 22,23 , the current phase-resolved THz results allow us to quantitatively reveal the nonlinear susceptibility of the SRRs previously inaccessible and phase reversal of THz emission. Next, we make a brief comparison between our approach and the previous THz generation work in nano-plasmonic structures, for example, as shown in ref.…”

Section: Thz Emission From Electric and Magnetic-dipole Resonancesmentioning

confidence: 91%

“…In this regard, investigating metamaterials with few tens of nanometres thickness exhibiting artificial optical magnetism-that is, sustaining circulating ring currents at optical frequencies-can meet the urgent demand for new nonlinear materials for optical rectification free from both quasi-phase-matching limitation and spurious THz phonon absorption. This is mainly due to the coexistence of resonant nonlinearity [22][23][24] from magnetic dipoles and local electric field enhancement in the narrow gaps of the SRRs, which together allows efficient and broadband THz radiation from emitters of significantly reduced thickness. In addition, tailoring the magnetic resonances of the metamaterial emitters allows for matching to essentially any desired pump photon energy.…”

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confidence: 99%

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Broadband terahertz generation from metamaterials

et al. 2014

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The terahertz spectral regime, ranging from about 0.1-15 THz, is one of the least explored yet most technologically transformative spectral regions. One current challenge is to develop efficient and compact terahertz emitters/detectors with a broadband and gapless spectrum that can be tailored for various pump photon energies. Here we demonstrate efficient single-cycle broadband THz generation, ranging from about 0.1-4 THz, from a thin layer of split-ring resonators with few tens of nanometers thickness by pumping at the telecommunications wavelength of 1.5 mm (200 THz). The terahertz emission arises from exciting the magnetic-dipole resonance of the split-ring resonators and quickly decreases under off-resonance pumping. This, together with pump polarization dependence and power scaling of the terahertz emission, identifies the role of optically induced nonlinear currents in split-ring resonators. We also reveal a giant sheet nonlinear susceptibility B10 À 16 m 2 V À 1 that far exceeds thin films and bulk non-centrosymmetric materials.

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Section: Thz Emission From Electric and Magnetic-dipole Resonancesmentioning

confidence: 91%

mentioning

confidence: 99%

Broadband terahertz generation from metamaterials

et al. 2014

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“…1), where the electromagnetic response of the whole arises from the individual properties, or the collective responses, of the constituent elements 2 . The appeal of these meta--systems lies in their ability to exhibit electromagnetic properties that are not available from naturally occurring materials, such as the well--documented negative refractive index 3,4 that caused such an upsurge in metamaterial research at the turn of the millennium, they also open up opportunities in nonlinear photonics [5][6][7][8][9] and imaging 10 .…”

Section: Introductionmentioning

confidence: 99%

Plasmonic meta-atoms and metasurfaces

2014

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Despite the extraordinary degree of interest in optical metamaterials in recent years the hoped--for devices and applications have, in large part, yet to emerge, and it is becoming clear that the first generation of metamaterial--based devices will more likely arise from their two--dimensional equivalents, metasurfaces. In this review we describe the recent progress made in the area of metasurfaces formed from plasmonic meta--atoms. In particular we approach the subject from the perspective of the fundamental excitations supported by the meta--atoms and the interactions between them. We also identify some areas ripe for future research, and indicate likely avenues for future device development.

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“…Nanoparticles with different shapes, such as nanorods, exhibit different SPR wavelength bands with varying geometrical parameters and thus allow imaging applications requiring long wavelength for deep penetration. For example, PL from gold nanorods with varying aspect ratios [39] and SHG from plasmonic nanomaterials of various shapes and arrangements have been studied extensively [33,[40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear plasmonic imaging techniques and their biological applications

et al. 2016

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Nonlinear optics, when combined with microscopy, is known to provide advantages including novel contrast, deep tissue observation, and minimal invasiveness. In addition, special nonlinearities, such as switch on/off and saturation, can enhance the spatial resolution below the diffraction limit, revolutionizing the field of optical microscopy. These nonlinear imaging techniques are extremely useful for biological studies on various scales from molecules to cells to tissues. Nevertheless, in most cases, nonlinear optical interaction requires strong illumination, typically at least gigawatts per square centimeter intensity. Such strong illumination can cause significant phototoxicity or even photodamage to fragile biological samples. Therefore, it is highly desirable to find mechanisms that allow the reduction of illumination intensity. Surface plasmon, which is the collective oscillation of electrons in metal under light excitation, is capable of significantly enhancing the local field around the metal nanostructures and thus boosting up the efficiency of nonlinear optical interactions of the surrounding materials or of the metal itself. In this mini-review, we discuss the recent progress of plasmonics in nonlinear optical microscopy with a special focus on biological applications. The advancement of nonlinear imaging modalities (including incoherent/ coherent Raman scattering, two/three-photon luminescence, and second/third harmonic generations that have been amalgamated with plasmonics), as well as the novel subdiffraction limit imaging techniques based on nonlinear behaviors of plasmonic scattering, is addressed.

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Collective Effects in Second-Harmonic Generation from Split-Ring-Resonator Arrays

Cited by 175 publications

References 24 publications

Broadband terahertz generation from metamaterials

Broadband terahertz generation from metamaterials

Plasmonic meta-atoms and metasurfaces

Nonlinear plasmonic imaging techniques and their biological applications

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