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Phys. Rev. B 66, 075109 (2002) [5 pages]

Tunable three-dimensional photonic crystals using semiconductors with varying free-carrier densities

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Young-Ki Ha, Jae-Eun Kim, and Hae Yong Park *
Department of Physics, Korea Advanced Institute of Science and Technology, Taejon 305-701, Korea

Chul-Sik Kee and H. Lim
Department of Molecular Science and Technology, Ajou University, Suwon 442-749, Korea

Received 29 April 2002; published 9 August 2002

We show from theoretical calculations that three-dimensional photonic crystals constructed with close-packed air spheres in a semiconductor matrix can exhibit a complete photonic band gap (CPBG) in the near-infrared range. The CPBG is easily tunable by using the free-carrier density dependence of plasma frequencies of semiconductors. The frequency of the defect mode created by inserting a slab of semiconductor into inverted opals is also found to be tunable by changing the density of free carriers of the semiconductor.


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.66.075109
DOI: 10.1103/PhysRevB.66.075109
PACS: 42.70.Qs, 72.80.Tm, 78.20.Ci

* Email address: hypark@kaist.ac.kr

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