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Nonreciprocal Light Propagation in a Silicon Photonic Circuit

Research Area: Nanophotonics Year: 2011
Type of Publication: Article Keywords: Nanophotonics, reciprocity, parity-time symmetry, integrated optics, CMOS, silicon photonics, plasmonics
Authors: Feng, Liang; Ayache, M.; Huang, Jingqing; Xu, Y. -L.; Lu, M. -H.; Chen, Y. -F.; Fainman, Y.; Scherer, Axel
Journal: Science Volume: 333
Number: 6043 Pages: 729-733
Month: August
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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