We study a critically coupled system [Opt. Lett. 32, 1483 (2007)] with a Kerr nonlinear spacer layer. Nonlinearity is shown to inhibit null scattering in a critically coupled system at low powers. However, a system detuned from critical coupling can exhibit near-complete suppression of scattering by means of nonlinearity-induced changes in refractive index. Our studies reveal clearly an important aspect of critical coupling as a delicate balance in both the amplitude and the phase relations, while a nonlinear resonance in dispersive bistability concerns only the phase.
© 2013 Optical Society of America
(190.1450) Nonlinear optics : Bistability
(190.3270) Nonlinear optics : Kerr effect
(230.5750) Optical devices : Resonators
(310.1210) Thin films : Antireflection coatings
(260.2065) Physical optics : Effective medium theory
(130.4815) Integrated optics : Optical switching devices
Original Manuscript: May 28, 2013
Manuscript Accepted: June 11, 2013
Published: July 10, 2013
, "Nonlinearity induced critical coupling," Opt. Lett. 38, 2517-2520 (2013)
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