PROJECT TITLE :
Cavity-resonator-integrated guided-mode resonance filter consisting of curved gratings
An integration of a cavity resonator was recently proposed to miniaturise a guided-mode resonance filter for application to a tiny-diameter beam launched from an optical fibre or waveguide finish. Its operation principle has been demonstrated with a 1-dimensional configuration therefore way, however a two-dimensional configuration is important for practical applications. A grating coupler and a pair of distributed Bragg reflectors of curved gratings were designed for a guided wave propagating with divergence because of diffraction. The cavity-resonator-integrated guided-mode resonance filter of ten μm aperture was fabricated on a SiO2 primarily based waveguide. A narrowband reflection spectrum of zero.two nm full width at half maximum was demonstrated experimentally.
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