|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|
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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