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Backward Phase Matching for Second Harmonic Generation in Negative‐Index Conformal Surface Plasmonic Metamaterials

Backward phase matching, which describes counterpropagating fundamental and harmonic waves in a negative‐index medium, is one of the most intriguing phenomena in nonlinear metamaterials. Predicted theoretically decades ago, however, it is still a challenging task to be applied for efficient second h...

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Autores principales: Liu, Liangliang, Wu, Lin, Zhang, Jingjing, Li, Zhuo, Zhang, Baile, Luo, Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6247027/
https://www.ncbi.nlm.nih.gov/pubmed/30479919
http://dx.doi.org/10.1002/advs.201800661
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author Liu, Liangliang
Wu, Lin
Zhang, Jingjing
Li, Zhuo
Zhang, Baile
Luo, Yu
author_facet Liu, Liangliang
Wu, Lin
Zhang, Jingjing
Li, Zhuo
Zhang, Baile
Luo, Yu
author_sort Liu, Liangliang
collection PubMed
description Backward phase matching, which describes counterpropagating fundamental and harmonic waves in a negative‐index medium, is one of the most intriguing phenomena in nonlinear metamaterials. Predicted theoretically decades ago, however, it is still a challenging task to be applied for efficient second harmonic (SH) generation in a nonlinear metamaterial with ultrathin geometry and ultralow loss. Here, a negative‐index spoof plasmonic metamaterial is reported, which is composed of an ultrathin symmetrical corrugated metallic strips loaded with nonlinear active devices. The simulated and measured power spectra and surface near‐field distributions show that a peak SH signal can be generated at the backward phase‐matched frequency point in a 120° curved surface with high efficiency, thanks to the ultrathin flexible geometry, significant confinement effect, and large propagation length of the spoof surface plasmons. The results open new technological challenges from nano‐ and micro‐nonlinear photonics to science and engineering of compact, broadband, and efficient frequency‐mixing metamaterials and electromagnetic devices.
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spelling pubmed-62470272018-11-26 Backward Phase Matching for Second Harmonic Generation in Negative‐Index Conformal Surface Plasmonic Metamaterials Liu, Liangliang Wu, Lin Zhang, Jingjing Li, Zhuo Zhang, Baile Luo, Yu Adv Sci (Weinh) Full Papers Backward phase matching, which describes counterpropagating fundamental and harmonic waves in a negative‐index medium, is one of the most intriguing phenomena in nonlinear metamaterials. Predicted theoretically decades ago, however, it is still a challenging task to be applied for efficient second harmonic (SH) generation in a nonlinear metamaterial with ultrathin geometry and ultralow loss. Here, a negative‐index spoof plasmonic metamaterial is reported, which is composed of an ultrathin symmetrical corrugated metallic strips loaded with nonlinear active devices. The simulated and measured power spectra and surface near‐field distributions show that a peak SH signal can be generated at the backward phase‐matched frequency point in a 120° curved surface with high efficiency, thanks to the ultrathin flexible geometry, significant confinement effect, and large propagation length of the spoof surface plasmons. The results open new technological challenges from nano‐ and micro‐nonlinear photonics to science and engineering of compact, broadband, and efficient frequency‐mixing metamaterials and electromagnetic devices. John Wiley and Sons Inc. 2018-08-31 /pmc/articles/PMC6247027/ /pubmed/30479919 http://dx.doi.org/10.1002/advs.201800661 Text en © 2018 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Full Papers
Liu, Liangliang
Wu, Lin
Zhang, Jingjing
Li, Zhuo
Zhang, Baile
Luo, Yu
Backward Phase Matching for Second Harmonic Generation in Negative‐Index Conformal Surface Plasmonic Metamaterials
title Backward Phase Matching for Second Harmonic Generation in Negative‐Index Conformal Surface Plasmonic Metamaterials
title_full Backward Phase Matching for Second Harmonic Generation in Negative‐Index Conformal Surface Plasmonic Metamaterials
title_fullStr Backward Phase Matching for Second Harmonic Generation in Negative‐Index Conformal Surface Plasmonic Metamaterials
title_full_unstemmed Backward Phase Matching for Second Harmonic Generation in Negative‐Index Conformal Surface Plasmonic Metamaterials
title_short Backward Phase Matching for Second Harmonic Generation in Negative‐Index Conformal Surface Plasmonic Metamaterials
title_sort backward phase matching for second harmonic generation in negative‐index conformal surface plasmonic metamaterials
topic Full Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6247027/
https://www.ncbi.nlm.nih.gov/pubmed/30479919
http://dx.doi.org/10.1002/advs.201800661
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