Abstract
Large photonic bandgaps (PBGs) have been obtained by sweeping linearly
the parameters of complex sublattices inside the unitary cells of square-
and triangular-lattice photonic crystals. An efficient frequency-domain finite-element
method with periodical boundary conditions has been used for theoretical analyses.
PBGs in silicon/air photonic crystals for both polarization modes have been
considered for up to 21 eigenmodes and both low- and high-order PBGs have
been obtained by this relatively simple systematic process.
© 2012 IEEE
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