Silicon Photonic Crystal Filter with Ultrawide Passband Characteristics
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Electrical and electronic engineering
We report on what is believed to be the first example of an ultrawide, bandpass filter, based on a high-contrast multicomponent one-dimensional Si photonic crystal (PC). The effect of the disappearance of a limited number of flat stopbands and their replacement with extended passbands is demonstrated over a wide IR range. The passbands obtained exhibit a high transmission of 92% to 96% and a substantial bandwidth of 1800 nm, which is spectrally flat within the passband. The multicomponent PC model suggested can be applied to the design of any micro- or nanostructured semiconductor or dielectric material for application across a wide spectral range.
Baldycheva, A., Tolmachev, V.A., Perova, T.S., Zharova, Y. A., Astrova, E.V. and Kevin Berwick: Silicon Photonic Crystal Filter with Ultrawide Passband Characteristics. Optics letters Vol.36, issue 10, 2011 pp.1854-6. doi:10.1364/OL.36.001854