Common Metal-Dielectric-Metal Nanocavities for Multispectral Narrowband Light Absorption

Autor: Zhengqi Liu, Zhengwang Wang, Xiaoshan Liu, Mulin Liu, Guolan Fu, Guiqiang Liu, Shiwen Ren, Shan Huang
Rok vydání: 2015
Předmět:
Zdroj: Plasmonics. 11:781-786
ISSN: 1557-1963
1557-1955
Popis: We present a method to theoretically achieve multispectral narrowband light absorption in common metal-dielectric-metal nanocavities. Polarization-independent and wide-angle multi-band light absorption with absorbance up to 99 % is achieved owing to the excitation of multiple localized plasmon cavity modes. Strong interactions between plasmon resonances and photonic modes are further introduced for achieving sharp absorption spectrum with sub-10-nm bandwidth via a high-index dielectric spacer with a thickness exceeding λ/2. These findings can offer new perspectives for multispectral nano-optics devices including perfect light absorbers and subtractive polychromatic filters.
Databáze: OpenAIRE