PT symmetrical coupling microcavity and magnetic microcavity composite structure and application thereof

Abstract

The invention provides a PT symmetrical coupling microcavity and magnetic microcavity composite structure, which is integrally of a bilateral symmetry structure and comprises P layers arranged on the left side and the right side as well as a G layer and an L layer which are arranged in the middle, and every two of the P layers, the G layer and the L layer are arranged at intervals; each P layer is a coupling prism, the G layers and the L layers are coupling microcavities formed by dielectric layers with magneto-optical effects, the G layers are gain dielectric layers, and the L layers are loss dielectric layers. When the structure is in a PT symmetrical pole state, the structure has great transmissivity, the transmissivity value is up to thousands of, input weak light can be amplified by thousands of times and then transmitted out, and the transmissivity is linearly regulated and controlled by the magnetic induction intensity of an applied magnetic field; the structure can be used for amplifying light intensity or light signals or modulating signals of a strong light field through weak magnetic field signals.

Description

technical field [0001] The invention belongs to the field of optical devices, and in particular relates to a composite structure of a PT symmetrical coupling microcavity and a magnetic microcavity and an application thereof. Background technique [0002] In today's optical communication field, there is an increasing demand for optical devices with special functions, such as all-optical diodes, optical buffers, optical resonators, and optical memories; these optical components are analogous to electronic components Functions are designed, and usually need to rely on the optical effects of specific materials to achieve. Although there are many optical devices that are analogous to electronic components, there are still few results in the research on optical triodes. The reason is that it is difficult to find a mechanism to control strong signals through weak signals in the field of optics. [0003] In order to realize the optical triode, in the prior art, some researchers tri...

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Problems solved by technology

In addition to the singularity, there are some discrete poles in the broken state of the PT symmetry structure. At the poles, the two eigenvalues ​​of the structure scattering matrix are reciprocals of each other, and they correspond to the stimulated amplification mode and the coherent perfect absorption mode respectively. However, there are few studies on the pole state, especially the research and application of utilizing the characteristics at the pole of the PT symmetrical structure to enhance the optical effect.

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