Dl. Brundrett et al., Effects of modulation strength in guided-mode resonant subwavelength gratings at normal incidence, J OPT SOC A, 17(7), 2000, pp. 1221-1230
A comparative study of the reflection spectral resonances in weakly and str
ongly modulated subwavelength gratings is presented. The effects of strong
modulation in resonant subwavelength gratings have been largely ignored in
the literature. We show that the spectral stability of resonances as a func
tion of angle of incidence around normal can be greatly enhanced with stron
gly modulated gratings while the desirable narrow linewidth associated with
weakly modulated gratings is still maintained. (C) 2000 Optical Society of
America [S0740-3232(00)01007-3]. OCIS codes: 050.0050, 050.1950.