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High-Q microcavities realized in a circular photonic crystal slab |
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| Authors: | Sanshui Xiao Min Qiu |
| Affiliation: | Laboratory of Optics, Photonics and Quantum Electronics, Department of Microelectronics and Information Technology, Royal Institute of Technology (KTH), Electrum 229, 16440 Kista, 16440 Stockholm, Sweden |
| Abstract: | A series of microcavities in circular photonic crystal slabs are studied in this paper. It is shown that high quality factors can be obtained for such microcavities. For a cavity with three inner layers of air holes missing, Q factor larger than 105 can be obtained. It is also worth noting there exists resonant modes with high quality factors, even for the defect-free circular photonic crystal slab, due to gradual change of the average effective index. |
| Keywords: | Microcavity Photonic crystal Finite-difference time-domain method |
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