Abstract
We propose a nonreciprocal waveguide with different wavevectors for
forward and backward propagations. Utilizing this nonreciprocal waveguide,
we further compose a nonreciprocal micro-ring resonator, which possesses different
phase shifts for clockwise and anticlockwise circulatings. Using this nonreciprocal
resonator, more than 20 dB optical isolation can be achieved. This work demonstrates
that on-chip optical isolations can be accomplished with simple nonreciprocal
resonator components, which can show promising applications for integrated
optoelectronic systems.
© 2011 IEEE
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