Open AccessEnhancement of transmission efficiency of nanoplasmonic wavelength demultiplexer based on channel drop filters and reflection nanocavities
Author(s) -
Hua Lü,
Xueming Liu,
Yongkang Gong,
Dong Mao,
Leiran Wang
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.012885
Subject(s) - wavelength division multiplexing , demultiplexer , optics , materials science , drop (telecommunication) , finite difference time domain method , coupled mode theory , optical filter , wavelength , reflection (computer programming) , multiplexing , optoelectronics , plasmon , refractive index , physics , computer science , telecommunications , multiplexer , programming language
We propose and numerically investigate a novel kind of nanoscale plasmonic wavelength demultiplexing (WDM) structure based on channel drop filters in metal-insulator-metal waveguide with reflection nanocavities. By using finite-difference time-domain simulations, it is found that the transmission efficiency of the channel drop filter can be significantly enhanced by selecting the proper distance between the drop and reflection cavities. The result can be exactly analyzed by the temporal coupled-mode theory. According to this principle, a nanoscale triple-wavelength demultiplexer with high drop efficiencies is designed. The proposed structure can find more applications for the ultra-compact WDM systems in highly integrated optical circuits.