Controlled Fano resonances via symmetry breaking in metamaterials for high-sensitive infrared spectroscopy

Shuhei Hara, Atsushi Ishikawa, Takuo Tanaka, Yasuhiko Hayashi, Kenji Tsuruta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A high-sensitive polarized surface-enhanced infrared absorption (polarized SEIRA) is proposed and demonstrated by utilizing the resonant coupling of Fano-resonant mode of the asymmetric metamaterials and IR vibrational mode of a polymer nano-film. The asymmetric metamaterials consisting of an Au nano-rod pair with a coupling nano-antenna were fabricated and characterized to demonstrate the controlled Fano resonances at 1730 cm-1, which spectrally overlapped with the C=O stretching vibrational mode. In the co-polarized SEIRA measurement, the C=O mode of the PMMA nano-film was clearly observed as a conventional anti-resonant peak within the Fano line-shape of the metamaterial. For the cross-polarized case, on the other hand, a distinctive dip appeared within a cross-polarized transmission peak of the metamaterial. Since the unwanted background is strongly suppressed in the cross-polarized detection scheme, the signal contrast was dramatically improved, allowing for the attomole detection of the C=O bond in the far-field measurement. Our metamaterial approach achieves the significant improvement of signal-to-background ratio in the far-field measurement, thus paving the way toward the high-sensitive analysis of functional group in direct IR spectroscopy.

Original languageEnglish
Title of host publicationMetamaterials, Metadevices, and Metasystems 2016
PublisherSPIE
Volume9918
ISBN (Electronic)9781510602274
DOIs
Publication statusPublished - 2016
EventMetamaterials, Metadevices, and Metasystems 2016 - San Diego, United States
Duration: Aug 28 2016Sep 1 2016

Other

OtherMetamaterials, Metadevices, and Metasystems 2016
CountryUnited States
CitySan Diego
Period8/28/169/1/16

Fingerprint

Infrared Spectroscopy
Metamaterials
Symmetry Breaking
Infrared spectroscopy
broken symmetry
infrared spectroscopy
infrared absorption
far fields
vibration mode
Infrared absorption
Far Field
Infrared
Absorption
line shape
rods
antennas
Nanorods
Polymethyl Methacrylate
Functional groups
polymers

Keywords

  • Fano resonances
  • Plasmonic metamaterials
  • Plasmonic sensors
  • SEIRA
  • Symmetry breaking

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Hara, S., Ishikawa, A., Tanaka, T., Hayashi, Y., & Tsuruta, K. (2016). Controlled Fano resonances via symmetry breaking in metamaterials for high-sensitive infrared spectroscopy. In Metamaterials, Metadevices, and Metasystems 2016 (Vol. 9918). [991814] SPIE. https://doi.org/10.1117/12.2237559

Controlled Fano resonances via symmetry breaking in metamaterials for high-sensitive infrared spectroscopy. / Hara, Shuhei; Ishikawa, Atsushi; Tanaka, Takuo; Hayashi, Yasuhiko; Tsuruta, Kenji.

Metamaterials, Metadevices, and Metasystems 2016. Vol. 9918 SPIE, 2016. 991814.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hara, S, Ishikawa, A, Tanaka, T, Hayashi, Y & Tsuruta, K 2016, Controlled Fano resonances via symmetry breaking in metamaterials for high-sensitive infrared spectroscopy. in Metamaterials, Metadevices, and Metasystems 2016. vol. 9918, 991814, SPIE, Metamaterials, Metadevices, and Metasystems 2016, San Diego, United States, 8/28/16. https://doi.org/10.1117/12.2237559
Hara S, Ishikawa A, Tanaka T, Hayashi Y, Tsuruta K. Controlled Fano resonances via symmetry breaking in metamaterials for high-sensitive infrared spectroscopy. In Metamaterials, Metadevices, and Metasystems 2016. Vol. 9918. SPIE. 2016. 991814 https://doi.org/10.1117/12.2237559
Hara, Shuhei ; Ishikawa, Atsushi ; Tanaka, Takuo ; Hayashi, Yasuhiko ; Tsuruta, Kenji. / Controlled Fano resonances via symmetry breaking in metamaterials for high-sensitive infrared spectroscopy. Metamaterials, Metadevices, and Metasystems 2016. Vol. 9918 SPIE, 2016.
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