Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3358386
Keywords
optical beam splitters; optical switches; photonic crystals
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Funding
- National Basic Research Program of China [2007CB613202]
- National Nature Science Foundation of China [50632030]
- Changjiang Scholars, the Nature Science Foundation of China [10874080]
- Nature Science Foundation of Jiangsu Province [BK2007712]
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We report our design of a tunable one-way cross-waveguide splitter, resulting from the broken time-reversal symmetry, based on the edge modes of gyromagnetic photonic crystal. Mode control is accomplished by altering the radius or refractive index of a single central electro-optical rod. The on-off switch of the channels can be manipulated by external electric or magnetic field. Coupled-mode theory between defect modes and waveguide modes was used to characterize the transmission efficiency of the channels.
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