Tunable Fano-like resonances in bent single-mode waveguide-based Fabry-Perot resonator: erratum

In this erratum, we correct an error in the numerical simulation results published in Opt. Lett.44, 231 (2019)OPLEDP0146-959210.1364/OL.44.000231. The error arose from disregarding cladding modes in the straight input and output waveguide sections [Fig. 2(a) in the original paper]. Although these modes do not contribute directly to the calculated power in the reflected and transmitted fundamental modes in those sections, they do, nevertheless, play a significant role in shaping the reflection and transmission spectra of the bent resonator, as was found after the paper had been published. While the main findings of the original paper remain largely intact, quantitatively the spectra in Figs. 3-6 are inaccurate and must be replaced with the correct ones given in this erratum. Some minor modifications to the conclusions of the original paper that are required in view of the corrected results are also discussed.