band-stop plasmonic filter

What is it about?

Tunable band-stop plasmonic filter based on square ring resonators in a metal-insulator-metal structure

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Why is it important?

The effect of the structural parameters of square ring resonator is studied deploying the finite difference time domain method and the possibility of tuning the rejected wavelength is investigated in detail. The simulation results demonstrate that the rejected wavelength has a redshift with an increase in the size of the ring’s dimensions. A further study is carried out considering narrowing the bandwidth. To improve the quality factor of the proposed filter, a small ring within the resonator is introduced that considerably decreases the bandwidth of the peak with respect to it's central wavelength.