Effective generation of unidirectional SPP beam with arbitrary profile

Oubo You; Benfeng Bai; Xiaoyu Wu; Zhendong Zhu; Qixia Wang

doi:10.1117/12.2227668

26 April 2016 Effective generation of unidirectional SPP beam with arbitrary profile

Oubo You, Benfeng Bai, Xiaoyu Wu, Zhendong Zhu, Qixia Wang

Proceedings Volume 9890, Optical Micro- and Nanometrology VI; 98900W (2016) https://doi.org/10.1117/12.2227668
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

The beam formation of SPPs is very important in plasmonics. Different SPP beams could be used for different purposes, such as SPP focusing, non-diffractive SPP wave propagation, efficient SPP coupling, and manipulating particles. Here, we present a straightforward and effective method for generating unidirectionally propagating SPP beams with arbitrary profile in both amplitude and phase by locating the Δ-shaped nanoantennas. The Δ-shape of the nanoantennas is used to achieve unidirectionality of SPPs and the locations of the nanoantennas are controlled to realize arbitrary profile of the excited SPP wave. As examples, several SPP launchers generating different SPP beams are designed with this method. The near-field distribution of the generated SPP beams are also experimentally characterized to validate the effectiveness of this method.

Citation Download Citation

Oubo You, Benfeng Bai, Xiaoyu Wu, Zhendong Zhu, and Qixia Wang "Effective generation of unidirectional SPP beam with arbitrary profile", Proc. SPIE 9890, Optical Micro- and Nanometrology VI, 98900W (26 April 2016); https://doi.org/10.1117/12.2227668

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