Journal
APPLIED PHYSICS LETTERS
Volume 108, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4947431
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Funding
- National Nature Science Foundation of China [61275168, 11204177]
- National High Technology Research and Development Program of China (863 Program) [2015AA020944]
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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-mu m 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. Published by AIP Publishing.
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