20 September 2002 Broad-linewidth bandstop filters with multilayer grating structure
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Proceedings Volume 4927, Optical Design and Testing; (2002); doi: 10.1117/12.471209
Event: Photonics Asia, 2002, Shanghai, China
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.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ya Nie, Zhiheng Wang, Chengjun Lai, "Broad-linewidth bandstop filters with multilayer grating structure", Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); doi: 10.1117/12.471209; https://doi.org/10.1117/12.471209

Optical filters


Multilayer interference

Optical design

Refractive index

Optical components


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