Selective multi-wavelength infrared emission by stacked gap-plasmon thermal emitters

Hui Hsin Hsiao*, Bo Ting Xu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Selective multi-wavelength infrared light sources are important elements to achieve precise molecular detection by the usage of their intrinsic vibrational spectra. In this work, we proposed a double-stacked cross-shaped metal-dielectric-metal (MDM) resonator to achieve pentawavelength mid-infrared thermal emission. Through the optimization of un-symmetric crossshaped tri-layers incorporated with two sandwiched dielectric materials, four distinct emission bands associated with the magnetic resonances in stacked MDM resonators were realized, which shows nondispersive and polarization-dependent property due to the localized plasmon oscillations of the magnetic resonances. In addition, the phonon emission in the silicon dioxide layer also contributes one radiation peak at λ = 10 μm. Via a simple polarization rotator, the emission wavelengths can be tuned from 4.5 and 7.5 μm to 5.5 and 8.5 μm. This paves the way for simultaneous detection of multi-band molecular absorption fingerprint, and the polarizationtunable emission wavelengths also facilitate the possibility to achieve multi-compound sensing via one compact system.

原文英語
文章編號165201
期刊Nanotechnology
32
發行號16
DOIs
出版狀態已發佈 - 2021 四月 16

ASJC Scopus subject areas

  • 生物工程
  • 化學 (全部)
  • 材料科學(全部)
  • 材料力學
  • 機械工業
  • 電氣與電子工程

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