Abstract
We design an ultracompact optical isolator with normal incident geometry that operates with a bandwidth that is substantial for a device of this size. For operation in a telecommunication wavelength of , the thickness of the device is less than and the device supports an operating bandwidth of over which the minimum contrast ratio exceeds . Our design utilizes guided resonance in a photonic crystal slab to enhance magneto-optical effects, and exploits interference effects among multiple resonances to create desired transmission spectral line shapes.
© 2011 Optical Society of America
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