title: Multiple coupling of surface plasmons in quasiperiodic gratings.
abstract: 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 quasiperiodic grating.
authors.affiliation: Department of Physical Electronics, Fleischman Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel. idodolev@tau.ac.il
authors.forename: Ido
authors.initials: I
authors.lastname: Dolev
authors.forename: Michael
authors.initials: M
authors.lastname: Volodarsky
authors.forename: Gil
authors.initials: G
authors.lastname: Porat
authors.forename: Ady
authors.initials: A
authors.lastname: Arie