Anderson, Cheryl M. and Giapis, Konstantinos P. (1997) Symmetry reduction in group 4mm photonic crystals. Physical Review B, 56 (12). pp. 7313-7320. ISSN 0163-1829. http://resolver.caltech.edu/CaltechAUTHORS:ANDprb97
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The size of absolute band gaps in two-dimensional photonic crystals is often limited by band degeneracies at the lattice symmetry points. By reducing the lattice symmetry, these degeneracies can be lifted to increase the size of existing photonic band gaps, or to create new gaps where none existed for the more symmetric structure. Specifically, symmetry reduction by the addition of different diameter rods into the unit cell of two-dimensional square lattices (Laue group 4mm) is explored. This approach is especially useful in opening absolute band gaps in structures of dielectric rods in air, which are more easily microfabricated than a crystal of air columns in a dielectric background. Symmetry reduction offers a rational approach for exploring and designing new photonic crystal structures.
|Additional Information:||©1997 The American Physical Society Received 10 January 1997; revised 29 May 1997 Most of the computations were performed on an IBM RS/6000 Workstation awarded through the IBM University Grants Program. The authors are grateful to J. A. Kornfield for allowing free use of her group’s workstations. The work of K.P.G. was supported by the Camille and Henry Dreyfus Foundation.|
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|Deposited On:||03 May 2006|
|Last Modified:||26 Dec 2012 08:51|
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