Abstract
We experimentally demonstrate, by etching a “doubly
periodic” pattern in a high-index material (Ta$_2$O$_5$), that guided-mode resonance filters can exhibit polarization
independent peaks with a Q factor of 5600. Beyond this promising
result, complementary characterizations give us some leads to rectify the
energy repartition between reflection, transmission, and losses.
© 2010 IEEE
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