Journal
PHOTONICS RESEARCH
Volume 6, Issue 1, Pages 61-65Publisher
OPTICAL SOC AMER
DOI: 10.1364/PRJ.6.000061
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Funding
- Russian Science Foundation (RSF) [14-19-00796]
- Russian Foundation for Basic Research (RFBR) [15-07-00548, 6-29-11683]
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We propose a simple integrated narrowband filter consisting of two grooves on the surface of a slab waveguide. Spectral filtering is performed in transmission at oblique incidence due to excitation of an eigenmode of the structure localized at a ridge cavity between the grooves. For the considered parameters, zero reflectance and unity transmittance are achieved at resonant conditions. The width and location of the transmittance peak can be controlled by changing the widths of the grooves and of the ridge, respectively. The proposed filter may find application in waveguide-integrated spectrometers. (c) 2017 Chinese Laser Press
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