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We show that the rate at which light tunnels between neighboring multimode waveguides can be drastically increased or reduced by the presence of small longitudinal periodic modulations of the waveguide properties that stimulate resonant conversion between the eigenmodes of each waveguide. Such a conversion, available only in multimode guiding structures, leads to periodic power transfer into higher-order modes, whose tails may considerably overlap with neighboring waveguides. As a result, the effective coupling constant for neighboring waveguides may change by several orders of magnitude upon small variations in the longitudinal modulation parameters. (C) 2014 Optical Society of America
CitacióKartashov, Y.V.; Vysloukh, V.A.; Torner, L. Enhancement and inhibition of light tunneling mediated by resonant mode conversion. "Optics letters", 15 Febrer 2014, vol. 39, núm. 4, p. 933-936.