Abstract
We theoretically present the analysis and design of a nanoplasmonic bandpass filter with flat-top spectral characteristics by cascading a series of directly connected rectangular ring resonators based on metal–insulator–metal waveguides. Analyzed by the equivalent lumped circuit model of the transmission line to plasmonic waveguides, the transmission properties of a symmetric rectangular ring resonator with the directly connected input and output waveguides are approximately the same as that of a Fabry–Perot resonator. Then the thin-film design methodology is applied to realize a plasmonic bandpass filter with the squared passband. An example of cascaded two-rectangular ring resonator structure is numerically demonstrated by using the transmission line model and 2D finite difference time domain method.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Mehedi Hasan, Ferdousi Mayoa, Md. Sahabul Hossain, Rajib Ahmed, Mainul Hossain, Khaleda Ali, and Sharnali Islam
OSA Continuum 3(12) 3314-3323 (2020)
Sangsik Kim, Mengren Man, Minghao Qi, and Kevin J. Webb
Opt. Lett. 39(19) 5784-5787 (2014)
Yeong Hwan Ko and Robert Magnusson
Opt. Lett. 41(20) 4704-4707 (2016)