Perfect circular polarization separator based on magnetoelectric coupling

A magnetoelectric coupling and circular polarization technology, which is applied in the field of orthogonal circular polarization state separation devices, can solve the problems of relying on focused beams and complex implementation methods, and achieve low cost and perfect separation.

Pending Publication Date: 2021-12-10
HARBIN ENG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of perfect circular polarization splitter based on magnetoelectric coupling in order to overcome the problem that the realization of perfect circular polarization separation in most single structures relies on focused light beams and surface waves, and the realization method is complicated.

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  • Perfect circular polarization separator based on magnetoelectric coupling
  • Perfect circular polarization separator based on magnetoelectric coupling
  • Perfect circular polarization separator based on magnetoelectric coupling

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Embodiment 1

[0024] A schematic diagram of the structure of an air-hole ceramic disc circular polarization separator based on magnetoelectric coupling is shown in figure 1 As shown in (a), the air-hole ceramic disk based on magnetoelectric coupling consists of a central air hole and a ceramic disk, and the polarization direction of the incident ray-polarized plane light is parallel to the rotation axis of the structure. figure 1 (b) Schematic diagram of perfect circular polarization separation in the scattering far field, where the transverse spin dipole moment of the structure needs to be excited. Using the dipole model, the average Stokes polarization parameter S of the scattering hemisphere can be obtained by theoretical calculation 3 A measure of the polarization separation effect of the diffuse far field.

[0025] figure 2 (a) Schematic diagram depicting linearly polarized light incident on a magnetoelectrically coupled circular polarization splitter with an angle β between the inc...

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Abstract

The invention provides a perfect circular polarization separator based on magnetoelectric coupling. The separator is composed of a ceramic disc and a central air hole, the rotating axis of the ceramic disc and the rotating axis of the central air hole coincide, and the central air hole cannot penetrate through the ceramic disc, so that magnetoelectric coupling of the structure is realized, incident light is linear polarization planar light, and the propagation direction is perpendicular to the rotating axis of the structure. The polarization direction of the linear polarization plane light is parallel or perpendicular to the rotating axis of the structure. The ceramic material is adopted as a basic material, and the advantage of low cost is achieved; a complicated light source device for realizing perfect circular polarization separation in the past is simplified by plane light incidence; and the magnetoelectric coupling characteristic of the composite structure of the ceramic disc and the central air hole is beneficial to excitation of a longitudinal dipole mode which is difficult to excite by a common structure, so that a transverse spin dipole moment is constructed, and perfect separation of left-handed and right-handed circular polarization can be effectively realized.

Description

technical field [0001] The present invention relates to a device for separating orthogonal circular polarization states of input optical signals, in particular to a perfect circular polarization separator based on magnetoelectric coupling. Circular polarization and right-handed circular polarization states are separated and output with transverse symmetry. Background technique [0002] Light can be resolved into two orthogonal left-handed and right-handed circular polarization states. Perfect circular polarization separation refers to the phenomenon of laterally symmetrical separation of left-handed and right-handed circularly polarized light. In the past, the perfect circular polarization separation of a single structure device relied on focused beams. The principle is to excite the longitudinal dipole modes of the structure through the focused beams, thereby constructing the transverse spin electric dipole moment. However, this method is difficult to implement and is not...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28
CPCG02B27/286
Inventor 李汶佳刘建龙王东彬史金辉关春颖朱正李玉祥吕博徐文霞
Owner HARBIN ENG UNIV
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