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Reflective properties of double-ring resonator system coupled to a waveguide

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2 Author(s)
Chremmos, I. ; Dept. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Greece ; Uzunoglu, N.

The response of a pair of directly interacting ring resonators, side-coupled to a waveguide, is investigated analytically for the first time. Owing to the direct interresonator coupling, counterpropagating waves are excited in each resonator, resulting in a complex filter behavior that can be totally reflective or transmissive at certain resonant frequencies. Using the scattering matrix formalism, we show that a variety of single- to four-peak reflection profiles can be obtained by appropriate tuning of the involved coupling coefficients. The predictions are validated by means of a full-wave integral equation analysis.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 10 )