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Low-loss nonlinear optical isolators in silicon

A Correspondence to this article was published on 20 November 2020

Asymmetric forward and backward transmission through photonic structures can be achieved via optical nonlinearities, but existing systems have typically used slow thermo-optic effects. A new resonator design has now enabled low-loss, non-reciprocal pulse routing based on the Kerr nonlinearity in integrated silicon waveguides.

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Fig. 1: Origin of optical isolation in a nonlinear Fano resonator.


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Correspondence to Eric A. Kittlaus.

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Kittlaus, E.A., Weigel, P.O. & Jones, W.M. Low-loss nonlinear optical isolators in silicon. Nat. Photonics 14, 338–339 (2020).

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