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: |
Materials science
Absorption spectroscopy business.industry Multispectral image Surface plasmon Biophysics Physics::Optics 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Absorbance Narrowband Optics 0103 physical sciences Optoelectronics Photonics 010306 general physics 0210 nano-technology business Plasmon Biotechnology |
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 |
Externí odkaz: |