Nanophotonics (Jan 2021)

Dual functionality metamaterial enables ultra-compact, highly sensitive uncooled infrared sensor

  • Tao Jin,
  • Liang Zhongzhu,
  • Zeng Guang,
  • Meng Dejia,
  • Smith David R.,
  • Liu Qing Huo,
  • Yang Qingrui,
  • Zhang Menglun,
  • Pang Wei,
  • Liang Jingqiu,
  • Bourouina Tarik

DOI
https://doi.org/10.1515/nanoph-2020-0607
Journal volume & issue
Vol. 10, no. 4
pp. 1337 – 1346

Abstract

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Cointegration and coupling a perfect metamaterial absorber (PMA) together with a film bulk acoustic wave resonator (FBAR) in a monolithic fashion is introduced for the purpose of producing ultracompact uncooled infrared sensors of high sensitivity. An optimized ultrathin multilayer stack was implemented to realize the proposed device. It is experimentally demonstrated that the resonance frequency of the FBAR can be used efficiently as a sensor output as it downshifts linearly with the intensity of the incident infrared irradiation. The resulting sensor also achieves a high absorption of 88% for an infrared spectrum centered at a wavelength of 8.2 μm. The structure is compact and can be easily integrated on a CMOS-compatible chip since both the FBAR and PMA utilize and share the same stack of metal and dielectric layers.

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