Journal article
Coupling reducing k-points for supercell models of defects in three-dimensional photonic crystals
The optimum choice of k-point for supercell calculations of defect states in a three-dimensional photonic crystal is investigated for the case of a supercell with a simple cubic (SC) structure. By using the k-point (1/4,1/4,1/4) it is possible to eliminate the symmetric part of the repeated-image couplings for the first three neighbour shells in the SC lattice.
This result is shown to hold also for the case of non-equivalent axes (e.g. a distorted lattice, or an asymmetric defect structure). A specific example of a donor defect in a woodpile structure demonstrates that use of this k-point can lead to order-of-magnitude gains in computational efficiency.
Language: | English |
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Year: | 2004 |
Pages: | 117-120 |
ISSN: | 20408986 and 20408978 |
Types: | Journal article |
ORCIDs: | Lægsgaard, Jesper |