Nonreciprocal light propagation in a silicon photonic circuit |
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| Authors: | Feng Liang Ayache Maurice Huang Jingqing Xu Ye-Long Lu Ming-Hui Chen Yan-Feng Fainman Yeshaiahu Scherer Axel |
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| Institution: | Department of Electrical Engineering, California Institute of Technology, Pasadena, CA 91125, USA. lfeng@caltech.edu |
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| Abstract: | Optical communications and computing require on-chip nonreciprocal light propagation to isolate and stabilize different chip-scale optical components. We have designed and fabricated a metallic-silicon waveguide system in which the optical potential is modulated along the length of the waveguide such that nonreciprocal light propagation is obtained on a silicon photonic chip. Nonreciprocal light transport and one-way photonic mode conversion are demonstrated at the wavelength of 1.55 micrometers in both simulations and experiments. Our system is compatible with conventional complementary metal-oxide-semiconductor processing, providing a way to chip-scale optical isolators for optical communications and computing. |
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