Photonic crystal alloys: a new twist in controlling photonic band structure properties.
We identified new photonic structures and phenomenon that are analogous to alloy crystals and the associated electronic bandgap engineering. From a set of diamond-lattice microwave photonic crystals of randomly mixed silica and alumina spheres but with a well defined mixing composition, we observed that both bandedges of the L-point bandgap monotonically shifted with very little bowing as the composition was varied. The observed results were in excellent agreement with the virtual crystal approximation theory originally developed for electronic properties of alloy crystals. This result signifies the similarity and correspondence between photonics and electronics.
Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Hee Jin
HJ
Kim
Dong-Uk
DU
Kim
Young-Geun
YG
Roh
Jaejun
J
Yu
Heonsu
H
Jeon
Q-Han
QH
Park
D000497:Alloys / Q000737:chemistry*; D000537:Aluminum Oxide / Q000737:chemistry; D003461:Crystallography; D018130:Diamond / Q000737:chemistry; D017785:Photons; D013057:Spectrum Analysis
D000497:Alloys; D018130:Diamond; D000537:Aluminum Oxide