• Chinese Optics Letters
  • Vol. 20, Issue 2, 023602 (2022)
Chuangye Zhang, Changjun Min*, Yuquan Zhang, Yanan Fu, Ling Li, Yulong Wang, and Xiaocong Yuan**
Author Affiliations
  • Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
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    Abstract

    The cylindrical vector beam (CVB) has been extensively studied in recent years, but detection of CVBs with on-chip photonic devices is a challenge. Here, we propose and theoretically study a chiral plasmonic lens structure for CVB detection. The structure illuminated by a CVB can generate single plasmonic focus, whose focal position depends on the incident angle and the polarization order of CVB. Thus, the incident CVB can be detected according to the focal position and incident angle and with a coupling waveguide to avoid the imaging of the whole plasmonic field. It shows great potential in applications including CVB-multiplexing integrated communication systems.

    1. Introduction

    As an important part of modern optics, singular optics has attracted more and more research attention in recent years[13]. Optical phase singularity and polarization singularity originate from the uncertainty of phase and polarization in the light field, and their corresponding representative beams are the well-known optical vortex (OV) and cylindrical vector beam (CVB), respectively. CVB is a kind of singular optical beam with spatially non-uniform but rotational-symmetric polarization state, therefore forming a polarization singularity in the center of the beam’s cross section with a donut-shaped intensity pattern[4,5]. Due to the novel properties in polarization, CVB has been widely applied in many optical research fields, such as optical tweezers[6,7], surface plasmon polariton (SPP) excitation and modulation[8], fiber laser of the CVB[911], tip enhanced Raman spectroscopy[12,13], and others. Besides the well-known radial and azimuth polarized beams[14], CVB includes a high-order vectorial polarization state[15]. Since CVBs of different polarization orders are orthogonal to each other, the polarization order of CVBs has already been employed as a new degree of freedom in CVB-multiplexing optical communication systems[16,17].

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    Chuangye Zhang, Changjun Min, Yuquan Zhang, Yanan Fu, Ling Li, Yulong Wang, Xiaocong Yuan. Detection of cylindrical vector beams with chiral plasmonic lens[J]. Chinese Optics Letters, 2022, 20(2): 023602
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    Category: Nanophotonics, Metamaterials, and Plasmonics
    Received: Sep. 13, 2021
    Accepted: Nov. 2, 2021
    Posted: Nov. 3, 2021
    Published Online: Nov. 19, 2021
    The Author Email: Changjun Min (cjmin@szu.edu.cn), Xiaocong Yuan (xcyuan@szu.edu.cn)