Investigation of the nonlinear optical properties of metamaterials by second harmonic generation

We apply a rigorous eigenmode analysis to study the electromagnetic properties of linear and weakly nonlinear metamaterials. The nonlinear response can be totally described by the linear eigenmodes when weak nonlinearities are attributed to metamaterials. We use this theory to interpret intrinsic second-harmonic spectroscopy on metallic metamaterials. Our study indicates that metamaterial eigenmodes play a critical role in optimizing a nonlinear metamaterial response to the extent that a poorly optimized modal pattern overwhelms the widely recognized benefits of plasmonic resonant field enhancements.

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“…This expression will result in a Lorentzian shaped curve, similar to the experimental observations 58,61 . Additionally, for ω location strongly.…”

Section: Frequency-dependency Of Intrinsic Shg In Metallic Metamasupporting

confidence: 58%

Modal analysis method to describe weak nonlinear effects in metamaterials

et al. 2012

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“…Another attractive feature of the DRA is that both dipolar resonances at both frequencies are spatially coupled. It is well known that the central symmetry of the nanostructures strongly influences the amount of second-harmonic signal that is generated [21][22][23][24][25][26]. Indeed, in a structure with perfect symmetry, the electric dipole contribution vanishes and only the much weaker magnetic dipole and electric quadrupole remains.…”

Section: Discussionmentioning

confidence: 99%

Enhanced second-harmonic generation from double resonant plasmonic antennae

et al. 2012

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We present a novel plasmonic antenna geometry - the double resonant antenna (DRA) - that is optimized for second-harmonic generation (SHG). This antenna is based on two gaps coupled to each other so that a resonance at the fundamental and at the doubled frequency is obtained. Furthermore, the proximity of the localized hot spots allows for a coupling and spatial overlap between the two field enhancements at both frequencies. Using such a structure, both the generation of the second-harmonic and its re-emission into the far-field are significantly increased when compared with a standard plasmonic dipole antenna. Such DRA are fabricated in aluminium using electron beam lithography and their linear and nonlinear responses are studied experimentally and theoretically.

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“…The development of the fabrication technology at nanoscale has opened many opportunities for scientists in investigating unusual characteristics of artificial structures . By designing the deliberated geometries, one can utilize the surprising behaviors of nanostructures to create expected effects such as negative refractive index, local field enhancement, or plasmon excitation …”

Section: Introductionmentioning

confidence: 99%

Optical second harmonic generation of V‐shaped chromium nanoholes—dependence on the structure parameters of the nanoholes

Quang

Miyauchi

Mizutani

et al. 2014

Surface & Interface Analysis

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We investigated optical second harmonic generation (SHG) from the arrays of V‐shaped chromium nanoholes with the arm width of 50 nm. We systematically investigated the dependence of the SHG intensity on the designed parameters of Cr nanoholes, i.e. the arm length and apex angle. Several combinations of structural parameters of apex angles (A) and arm lengths (L) were examined. The SHG intensity in Pin/Pout configuration was enhanced when L was enlarged. We suggest that the nonlinear optical behavior was dictated by the bulk contribution of metallic electrons. Copyright © 2014 John Wiley & Sons, Ltd.

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Investigation of the nonlinear optical properties of metamaterials by second harmonic generation

Cited by 26 publications

References 69 publications

Modal analysis method to describe weak nonlinear effects in metamaterials

Modal analysis method to describe weak nonlinear effects in metamaterials

Enhanced second-harmonic generation from double resonant plasmonic antennae

Optical second harmonic generation of V‐shaped chromium nanoholes—dependence on the structure parameters of the nanoholes

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