Whereas periodic gratings enable us to couple light into a surface plasmon polariton only at a specific angle and wavelength, we show here that quasiperiodic gratings enable the coupling of light at multiple wavelengths and angles. The quasiperiodic grating can be designed in a systematic manner using the dual-grid method, thereby enabling us to control the coupling strength and grating dimensions. We verified the method experimentally by efficiently coupling light into a surface plasmon from several different illumination angles using a single quasi periodic grating.
© 2011 Optical Society of America
Optics at Surfaces
Original Manuscript: February 15, 2011
Revised Manuscript: March 21, 2011
Manuscript Accepted: March 29, 2011
Published: April 22, 2011
Ido Dolev, Michael Volodarsky, Gil Porat, and Ady Arie, "Multiple coupling of surface plasmons in quasiperiodic gratings," Opt. Lett. 36, 1584-1586 (2011)