Terahertz spatial light modulator, preparation method and application

Abstract

The embodiment of the invention discloses a terahertz spatial light modulator, a preparation method and application. The terahertz spatial light modulator comprises a first substrate, a second substrate and a liquid crystal layer which are oppositely arranged, and spacer particles are arranged between the first substrate and the second substrate to support the liquid crystal layer; an electrode layer and a first orientation layer are arranged on one side, close to the liquid crystal layer, of the first substrate; the electrode layer comprises a plurality of interdigital electrodes arranged inan array; a super-structure surface layer and a second orientation layer are arranged on one side, close to the liquid crystal layer, of the second substrate; the super-structure surface layer comprises a plurality of split ring resonators which are arranged in an array; the orientation directions of the first orientation layer and the second orientation layer are the same, and the orientation directions intersect with the second direction. According to the technical scheme provided by the embodiment of the invention, the spatial light modulation function can be realized in transmission and reflection modes according to different incident polarization directions, so that the technical problems of single function and low integration level of the terahertz spatial light modulator in the prior art are solved.

Description

technical field [0001] Embodiments of the present invention relate to terahertz optoelectronic technology, and in particular to a terahertz spatial light modulator, a preparation method and an application. Background technique [0002] Terahertz waves are electromagnetic waves with a frequency between 0.1 THz and 10 THz (corresponding to a wavelength of 30 μm to 3000 μm), and have unique properties. Terahertz waves can penetrate non-polar and non-metallic materials, and the ionizing radiation is small; in addition, many organic or biomolecules have collective vibration modes in this wave band, forming a unique "terahertz fingerprint". These characteristics provide great opportunities for terahertz human security inspection, industrial inspection and medical diagnosis. The carrier frequency of terahertz waves is much higher than the current commercial radio frequency band, so it may be used in future high-speed wireless communications to solve the communication needs of rapi...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a terahertz spatial light modulator, a preparation method, and an application thereof. The terahertz spatial light modulator can realize spatial light modulation functions in both transmission and reflection modes according to different incident polarization directions, so as to solve current problems. There are technical problems that the terahertz spatial light modulator has a single function and low integration level, and it has great application potential in terahertz communication and imaging.

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