Regular reflection type electric field sensor adopting PT (parity-time) symmetrical structure

• Main Authors: FANG YUNTUAN, ZHU YUGUANG, ZHANG YICHI
• Format: Patent
• Language: Chinese; English
• Published: 16.08.2019
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a regular reflection type electric field sensor adopting a PT (parity-time) symmetrical structure. The electric field sensor adopts the cyclical PT symmetrical structure, wherein each cycle comprises three different A, B and C dielectric layers in sequence, and the cycle number is N; the A layer is formed by a gain dielectric material, the C layer is formed by a loss dielectric material, and the B layer is constructed by an electrooptical material; the B layer in the structure acts as a resonant cavity, and Bragg scattering is produced in cooperation with the cyclical structure; all materials are non-magnetic materials. The electric field sensor structurally mainly has a band edge mode and a regular reflection phenomenon under the joint action of Bragg scattering and the resonant cavity and can realize electric field sensing by measuring the magnitude of the transmissivity of the structure and judge the direction of an external electric field by analysis of thereflectivity. Through ana