doi.org/10.1364/AO.43.000999
Appl. Opt.

Popov, E, Enoch, S, Tayeb, G, Neviere, M, Gralak, B, & Bonod, N. (2004). Enhanced transmission due to nonplasmon resonances in one- and two-dimensional gratings. Appl. Opt., 43, 999–1008. doi:10.1364/AO.43.000999