Refractive index engineering of metal-dielectric nanocomposite thin films for optical super absorber

Nan Zhang, Kai Liu, Haomin Song, Zhejun Liu, Dengxin Ji, Xie Zeng, Suhua Jiang, Qiaoqiang Gan

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Using metal-dielectric nanocomposite materials, we developed thin-film resonant and nonresonant absorbers with tunable absorption band. A compact double-side vertically graded metal-dielectric nanocomposite absorber was fabricated by gradually varying metal-dielectric nanocomposite ratios. The optical impedance of this metal-dielectric nanocomposite structure can be engineered to realize the antireflection characteristics. A broad-band and angle-insensitive super absorption over 81% was obtained in visible to near-infrared spectral region (i.e., 400 nm to 1100 nm), which is broader than recently reported plasmonic metamaterial absorbers in the similar spectral region. © 2014 AIP Publishing LLC.
Original languageEnglish (US)
JournalApplied Physics Letters
Issue number20
StatePublished - May 19 2014
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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