Planar waveguide type hyperbolic metamaterial and ultra-small resonant cavity

Abstract

The invention discloses a planar waveguide type hyperbolic metamaterial and an ultra-small resonant cavity. A planar waveguide is formed by two metal plates in the height direction, two kinds of dielectric sheets are alternately and periodically arranged in the planar waveguide, the dielectric sheets are uniform sheets with sub-wavelength thicknesses, the height of the dielectric sheets is the same with that of the planar waveguide, and a metal wire array is arranged on interfaces of the adjacent dielectric sheets and used for restraining mode coupling. The planar waveguide works in a TE modeand can be homogenized into a waveguide type metamaterial, an equal-frequency curve is a hyperbolic curve, and a large wave vector which is more than ten times that of a free space wave vector is supported; the shape of the equal-frequency curve can be adjusted through matching of geometrical parameters and dielectric constants of dielectric materials, and different opening directions are achieved; and the metalmaterial is suitable for all frequency bands from terahertz to microwaves to radio frequency and optical frequency bands. The metamaterial is low in loss, supports large wave vectors,is flexible and adjustable in equal-frequency curve, and is convenient to integrate in a waveguide loop. The ultra-small resonant cavity is realized by adopting the waveguide type hyperbolic metamaterial.

Description

technical field

[0001] The invention belongs to the field of electromagnetic fields and electromagnetic waves, and in particular relates to a flat waveguide type hyperbolic metamaterial and an ultra-small resonant cavity. Background technique

[0002] In the field of electromagnetic fields and electromagnetic waves, resonant cavities play a fundamental role and can be used for filtering and enhancing the interaction between electromagnetic waves and matter. They have important applications in the fields of electromagnetic wave sources, sensing, communication, and energy. It is of great significance to reduce the size of the resonant cavity while maintaining the flexibility and adjustability of its resonant characteristics.

[0003] The resonant cavity needs to meet the standing wave condition: in the three directions of length, width, and height, the sum of a round-trip propagation phase and reflection phase must be an integer multiple of 2π. The small size of the resonator...

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