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Abstract
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This study theoretically investigates the properties of the defect mode with externalcontrollability in a symmetric 1D defective photonic crystal (1DDPC) composed of a fer-roelectric layer and two pairs of thin Indium–tin oxide (ITO) as defect layers. The tunabilityof defect mode was investigated, as a function of the electric field alongside the incidentangle. The results reveal that the defect mode wavelength can be tuned by variations of theelectric field and the incident angle as well Because of the polarization-dependent opticalproperties of ferroelectric layer, the shift trend in the defect mode is shown to also rely onthe polarization. The proposed structure can be good candidate in designing an externallytunable optical filter with potential applications in electro-optical devices.
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