A new microcavity design is proposed and structures are realized with a two-dimensional photonic-crystal slab. The cavity consists of seven defect holes that encompass a hexagon and is designed to reduce vertical light leakage. From a direct transmission measurement, a Q value of 816±30 is achieved at λ =1.55 μm . This high- Q cavity will permit the realistic realization of spontaneous-emission modification and on–off optical switches.
© 2001 Optical Society of America
S. Y. Lin, Edmond Chow, S. G. Johnson, and J. D. Joannopoulos, "Direct measurement of the quality factor in a two-dimensional photonic-crystal microcavity," Opt. Lett. 26, 1903-1905 (2001)