Field-enhanced nanofocusing of radially polarized light by a tapered hybrid plasmonic waveguide with periodic grooves

Xu, Ji; Li, Kang; Zhang, Sicheng; Lu, Xinyi; Shi, Nannan; Tan, Zhaohuan; Lu, Yunqing; Liu, Ning; Zhang, Baifu; Liang, Zhen

doi:10.1364/ao.58.000588

Cited by 6 publications

(1 citation statement)

References 32 publications

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“…Radially polarized beams have been investigated extensively in the past several decades because of their extraordinary properties and wide applications, such as in super-resolution imaging, optical tweezers, material processing, optical data storage, plasmon excitation, and nanofocusing [1][2][3][4][5][6][7]. As a natural extension of a spatially coherent radially polarized beam, the partially coherent radially polarized (PCRP) beam with a conventional Gaussian-Schell-model correlation function was introduced and studied in detail [8].…”

Section: Introductionmentioning

confidence: 99%

Nonparaxial Propagation Properties of Specially Correlated Radially Polarized Beams in Free Space

et al. 2019

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A specially correlated radially polarized (SCRP) beam with unusual physical properties on propagation in the paraxial regime was introduced and generated recently. In this paper, we extend the paraxial propagation of an SCRP beam to the nonparaxial regime. The closed-form 3 × 3 cross-spectral density matrix of a nonparaxial SCRP beam propagating in free space is derived with the aid of the generalized Rayleigh–Sommerfeld diffraction integral. The statistical properties, such as average intensity, degree of polarization, and spectral degree of coherence, are studied comparatively for the nonparaxial SCRP beam and the partially coherent radially polarized (PCRP) beam with a conventional Gaussian–Schell-model correlation function. It is found that the nonparaxial properties of an SCRP beam are strikingly different from those of a PCRP beam. These nonparaxial properties are closely related to the correlation functions and the beam waist width. Our results may find potential applications in beam shaping and optical trapping in nonparaxial systems.

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