Broad-linewidth bandstop filters with multilayer grating structure

Ya Nie; Zhiheng Wang; Chengjun Lai

doi:10.1117/12.471209

20 September 2002 Broad-linewidth bandstop filters with multilayer grating structure

Ya Nie, Zhiheng Wang, Chengjun Lai

Proceedings Volume 4927, Optical Design and Testing; (2002) https://doi.org/10.1117/12.471209
Event: Photonics Asia, 2002, Shanghai, China

Abstract

A novel type of bandstop filters according to multilayer grating structure is presented. This device is based on guided-mode resonance effect of waveguide grating structure and interference effect of multilayer structure. The multilayer thin-film stacks consist of Si and SiO₂ layer alternantly. This device is designed for an operating wavelength of 1.55 μm. Calculated examples show that high efficiency and broad reflectance can be achieved with a few layer pairs. Provided that the number of the layer pairs reaches to a certain value, the total-reflection phenomenon can be found. The low angular sensitivity, another important property, is also discussed. It is found that the total-reflection maintains during a relative large changing range of incident angle.

Citation Download Citation

Ya Nie, Zhiheng Wang, and Chengjun Lai "Broad-linewidth bandstop filters with multilayer grating structure", Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); https://doi.org/10.1117/12.471209

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