The cross conversion between surface plasmon polaritons (SPPs) and quasi-cylindrical waves (CWs) is theoretically reexamined. Except for the CW-to-SPP conversion, we find the SPP-to-CW conversion, as well as the reflection and transmission of the CW, plays an indispensable role in the interaction between SPPs and light via periodic grooves. The completeness of the whole scattering coefficients is emphasized by an SPP–CW model proposed to quantitatively predict the SPP excitation efficiency for any number of periodic grooves.
© 2010 Optical Society of America
Optics at Surfaces
Original Manuscript: June 11, 2010
Revised Manuscript: August 16, 2010
Manuscript Accepted: August 27, 2010
Published: September 20, 2010
Guangyuan Li, Lin Cai, Feng Xiao, and Anshi Xu, "Theoretical reexamination of the cross conversion between surface plasmon polaritons and quasi-cylindrical waves," Opt. Lett. 35, 3162-3164 (2010)