Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale

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• 作者：Zoran Jakšić ; Milče M. Smiljanić…
• 关键词：Nanoplasmonics ; Surface plasmons polaritons ; Extraordinary optical transmission ; Aperture ; based plasmonics ; Field localization
• 刊名：Optical and Quantum Electronics
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：48
• 期：4
• 全文大小：1,475 KB
• 参考文献：Brolo, A.G., Gordon, R., Leathem, B., Kavanagh, K.L.: Surface plasmon sensor based on the enhanced light transmission through arrays of nanoholes in gold films. Langmuir 20, 4813–4815 (2004)CrossRef
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  Jiang, Z.H., Yun, S., Lin, L., Bossard, J.A., Werner, D.H., Mayer, T.S.: Tailoring dispersion for broadband low-loss optical metamaterials using deep-subwavelength inclusions. Sci. Rep. 3, 1–9 (2013a)
  Jiang, Z.H., Lin, L., Bossard, J.A., Werner, D.H.: Bifunctional plasmonic metamaterials enabled by subwavelength nano-notches for broadband, polarization-independent enhanced optical transmission and passive beam-steering. Opt. Express 21, 31492–31505 (2013b)ADS CrossRef
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• 作者单位：Zoran Jakšić (1)
  Milče M. Smiljanić (1)
  Dana Vasiljević-Radović (1)
  Marko Obradov (1)
  Katarina Radulović (1)
  Dragan Tanasković (1)
  Predrag M. Krstajić (1)
  
  1. Centre of Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000, Belgrade, Serbia
  
• 刊物主题：Optics, Optoelectronics, Plasmonics and Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X

文摘

Aperture-based nanoplasmonics deals with an important class of structures with subwavelength hole arrays that support surface plasmons polaritons, thus ensuring control over propagation and localization of electromagnetic fields. The electromagnetic field localization in aperture-based plasmonic structures can be tailored by modifying the structure geometry at the deep subwavelength scale, in this way generating field hotspots in a controlled way. We defined subwavelength primitive objects and combined them in Boolean manner by applying logical operations like AND or OR to their shapes to generate complex forms and thus modify the subwavelength unit cell geometry. We designed our structures and simulated their scattering parameters by the finite element method and fabricated the experimental samples for the mid-wavelength infrared range using the conventional silicon-based planar technologies with gold and aluminum as plasmonic materials. We show that one can readily use the conventional, non-subwavelength photolithography to generate strong field nonlocalities without increasing the complexity of the system or requiring finer resolutions. The approach can be used for multispectral operation of plasmonic chemical or biological sensors.