Comment on "Nonreciprocal light propagation in a silicon photonic circuit".

Science 2012 Jan;335(6064):38; author reply 38

Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA.

We show that the structure demonstrated by Feng et al. (Reports, 5 August 2011, p. 729) cannot enable optical isolation because it possesses a symmetric scattering matrix. Moreover, one cannot construct an optical isolator by incorporating this structure into any system as long as the system is linear and time-independent and is described by materials with a scalar dielectric function.

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http://dx.doi.org/10.1126/science.1216682DOI Listing
January 2012
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