Chinese Optics Letters, 2015, 13 (2): 020501, Published Online: Sep. 25, 2018
Free space optical beam coupled to surface plasmonic polariton waves via designed grooves in metal film Download: 815次
050.1970 Diffractive optics 240.6680 Surface plasmons 310.6628 Subwavelength structures,nanostructures
Abstract
Surface plasmonic polariton (SPP) waves with complicated wavefronts have important implications in nanophotonic sciences and applications. The surface electromagnetic wave holography method is applied to designed grooves on a metal surface for coupling a plane wave in free space to complicated wavefront SPP waves. The grooves illuminated by the plane wave incident from free space serve as secondary SPP waves sources, that radiate cylindrical SPP waves. New controllable wavefronts originate from these secondary SPP waves interfering with each other, based on the Huygens–Fresnel principle. Several applications of the method are demonstrated, such as converting coupling waves in free space into focusing SPP waves on a metal surface.
Yuegang Chen, Zhiyuan Li. Free space optical beam coupled to surface plasmonic polariton waves via designed grooves in metal film[J]. Chinese Optics Letters, 2015, 13(2): 020501.