Probe 2 excites the TE 0 in the lower waveguide. Probe 1 excites the TE 0 mode in the top waveguide. two analyzer waveguides which transmit the output of the resonator into two spatially separated locations, depending on its transverse profile TE 0 (upper) or TE 2 (lower). the resonator region consisting of the multimode waveguide enclosed by the two mode converters, and 3. two input waveguides (left) that allow to probe the resonator with either TE 0 (upper) or TE 2 (lower), 2. b Schematic of the device shows three different sections: 1. The entire photonic circuit ridge is buried into a silica layer. The periodicity Λ is chosen such that the phase-matching condition is satisfied for contra-directional coupling. ![]() The mode converters are realized by corrugating the silicon waveguide laterally into the shape of a rectangular grating of periodicity Λ and width w g. Multimode waveguides located before and after the resonator guide telecom light into and outside the resonator. ![]() a SEM pictures of the cascaded-mode resonator show two mode converters connected via a multimode waveguide of width w wg and length L wg. The experimental realization of cascaded-mode resonators in integrated photonics.
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