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Published March 1999 | Published
Journal Article Open

Finite-difference time-domain calculation of spontaneous emission lifetime in a microcavity


We developed a general numerical method to calculate the spontaneous emission lifetime in an arbitrary microcavity, using a finite-difference time-domain algorithm. For structures with rotational symmetry we also developed a more efficient but less general algorithm. To simulate an open radiation problem, we use absorbing boundaries to truncate the computational domain. The accuracy of this method is limited only by numerical error and finite reflection at the absorbing boundaries. We compare our result with cases that can be solved analytically and find excellent agreement. Finally, we apply the method to calculate the spontaneous emission lifetime in a slab waveguide and in a dielectric microdisk, respectively.

Additional Information

© 1999 Optical Society of America Received October 30, 1998 This research was sponsored by the U.S. Army Research Office, the U.S. Office of Naval Research, and the National Science Foundation. R. K. Lee and O. J. Painter also acknowledge support from the National Science and Engineering Research Council of Canada.

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