Right-hand circularly-polarized conversion meta-material film

Abstract

The invention discloses a right-hand circularly-polarized conversion meta-material film which is an optical frequency band meta-material structure. The right-hand circularly-polarized conversion meta-material film comprises metal micro structure layers 1,3 and a medium substrate layer 2; the metal micro-structure layers 1,3 are arranged on two sides of the substrate layer 2; the upper surface of the metal micro-structure layer 1 is a metal surface 1 and the lower surface is a metal surface 2; the upper surface of the metal micro-structure layer 3 is a metal surface 3 and the lower surface is a metal surface 4; the metal surface 1 is an incident surface, and the metal surface 4 is an output surface; the metal micro-structure layers 1,3 are levorotation windmill structures which are chirally symmetric or spiral levorotation artificial structures which are chirally symmetric; an angle to right with the structure center as a rotation center is formed between the metal micro-structure layer 1 and the metal micro-structure layer 3; and the amplitudes of two orthogonal components of the output light wave are equal, and the phase difference of two orthogonal components is odd-number times of the 90 degrees. The right-hand circularly-polarized conversion meta-material film is simple in structure and high in conversion efficiency, can convert one polarized light beam to right-hand circularly polarized light and is high in output light beam quality.

Description

technical field [0001] The invention relates to the field of optical communication, and more specifically, the invention relates to a right-handed circular polarization conversion metamaterial thin film. Background technique [0002] Waves will vibrate in different directions during propagation, and this vibration is called wave polarization, which is an inherent characteristic of waves. For example, electromagnetic waves, sound waves, and gravitational waves all have polarization characteristics, and the polarization characteristics of various waves are also different. For example, the polarization direction of sound waves is consistent with its propagation direction. Usually, such waves whose polarization direction is consistent with the propagation direction are called longitudinal waves. Waves whose polarization direction is perpendicular to the direction of propagation are called transverse waves. The electromagnetic wave is a typical transverse wave, which has the pol...

AI Technical Summary

Problems solved by technology

[0008] According to the structure, the wave plate can be divided into multi-order wave plate, composite wave plate and true zero-order wave plate, but no matter which wave plate has its own shortcomings, such as wavelength sensitivity, temperature sensitivity, incident angle sensitivity, etc. Difficulty in sex or craftsmanship, etc.

Faraday rotators have problems such as poor temperature characteristics, prominent light attenuation, high insertion loss, low control accuracy, and large volume.

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