Dual-band plasmonic resonator based on Jerusalem cross-shaped nanoapertures

Creative Commons License

Cetin A. E., Kaya S., Mertiri A., Asian E., Erramilli S., Altag H., ...Daha Fazla

PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS, cilt.15, ss.73-80, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.photonics.2015.04.001
  • Dergi Adı: PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.73-80
  • Anahtar Kelimeler: Plasmonics, Nanofabrication, Metamaterials, Subwavelength optics, Multi-band resonator, OPTICAL-TRANSMISSION, NEAR-FIELD, ARRAYS, INDEX, METAMATERIALS, NANOANTENNA, SPECTROSCOPY, APERTURES, DOMAIN, TIME
  • Erciyes Üniversitesi Adresli: Evet

Özet

In this paper, we both experimentally and numerically introduce a dual-resonant metamaterial based on subwavelength Jerusalem cross-shaped apertures. We numerically investigate the physical origin of the dual-resonant behavior, originating from the constituting aperture elements, through finite difference time domain calculations. Our numerical calculations show that at the dual-resonances, the aperture system supports large and easily accessible local electromagnetic fields. In order to experimentally realize the aperture system, we utilize a high-precision and lift-off free fabrication method based on electron-beam lithography. We also introduce a fine-tuning mechanism for controlling the dual-resonant spectral response through geometrical device parameters. Finally, we show the aperture system's highly advantageous far- and near-field characteristics through numerical calculations on refractive index sensitivity. The quantitative analyses on the availability of the local fields supported by the aperture system are employed to explain the grounds behind the sensitivity of each spectral feature within the dual-resonant behavior. Possessing dual-resonances with large and accessible electromagnetic fields, Jerusalem cross-shaped apertures can be highly advantageous for wide range of applications demanding multiple spectral features with strong nearfield characteristics. (C) 2015 Elsevier B.V. All rights reserved.