
H. A. Haus and D. A. B. Miller,
"Attenuation of Cutoff Modes and Leaky Modes of Dielectric Slab Structures,"
IEEE J. Quantum Electron. QE22, 310324 (1986). A simple formula is
developed for the attenuation constant of higher order cutoff modes of a dielectric slab
guide and of the modes of leaky guides. The formula is based on a perturbation analysis
that reduces the problem to that of the transmission characteristic of a FabryPerot
resonator. Under certain approximations, the formula for leaky guides reduces to that of
D.B. Hall and C. Yeh (1973) but the formula has a wider range of applicability
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