Gap plasmon resonator arrays for unidirectional launching and shaping of surface plasmon polaritons

Journal Article · Mon Apr 18 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4947431· OSTI ID:22591594

Lei, Zeyu; Yang, Tian ^[1]

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1. State Key Laboratory of Advanced Optical Communication Systems and Networks, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, UM-SJTU Joint Institute, Shanghai Jiao Tong University, Shanghai 200240 (China)

We report the design and experimental realization of a type of miniaturized device for efficient unidirectional launching and shaping of surface plasmon polaritons (SPPs). Each device consists of an array of evenly spaced gap plasmon resonators with varying dimensions. Particle swarm optimization is used to achieve a theoretical two-dimensional launching efficiency of about 51%, under the normal illumination of a 5-μm waist Gaussian beam at 780 nm. By modifying the wavefront of the SPPs, unidirectional SPPs with focused, Bessel, and Airy profiles are launched and imaged with leakage radiation microscopy.

• OSTI ID: 22591594
• Journal Information: Applied Physics Letters, Vol. 108, Issue 16; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAMS
DESIGN
EFFICIENCY
ILLUMINANCE
IMAGES
LEAKS
OPTIMIZATION
PLASMONS
POLARONS
RESONATORS
SURFACES