Sub-wavelength pore structure array with continuous amplitude and phase regulation function

Abstract

The invention relates to a sub-wavelength pore structure array with a continuous amplitude and phase regulation function. The sub-wavelength pore structure array is composed of a metal material film and a plurality of double-layer pore structure units which are located in the metal material film, wherein each double-layer pore structure unit is composed of upper-layer pores and lower-layer pores which are produced in the metal film, and the upper-layer pores and the lower-layer pores are coaxial through holes; the upper end surfaces of the upper-layer pores are superposed with the upper surface of the metal film layer, and the lower end surfaces of the lower-layer pores are superposed with the lower surface of the metal film layer; for an electromagnetic wave with a given wavelength, the effective refractive index of the double-layer pore structure unit can be adjusted by changing the diameters and depths of the upper-layer pores, and the diameters and depths of the lower-layer pores; and then continuous regulation for an amplitude and a phase in a certain range is realized. The plurality of double-layer pore structure units (that is, double-layer pore structure arrays) can be adopted on a plane as needed to realize continuous regulation for amplitude and phase distributions in the plane space. Meanwhile, the vibration and phase regulation function for the double-layer pore structure units can be further improved by filling a medium material in the double-layer pore structures.

Description

technical field [0001] The invention belongs to the technical field of light field regulation, and in particular relates to a sub-wavelength structure capable of continuously regulating the phase and amplitude of incident electromagnetic waves. Background technique [0002] The sub-wavelength structure can realize the regulation of the phase and amplitude of the incident electromagnetic wave, and can be applied to various electromagnetic wave functional devices. Achieving simultaneous continuous modulation of phase and amplitude is the key to functional electromagnetic wave devices. In micro-nano optical devices, the usual binary amplitude modulation or pure phase modulation cannot obtain the optimal optical design, which greatly limits the performance of micro-nano optical devices. Realizing the continuous control of the amplitude and phase of light waves will increase the design freedom of micro-nano optical devices and greatly improve the performance of micro-nano optica...

AI Technical Summary

Problems solved by technology

[0013] In the prior art, there is no report on the structure that realizes continuous amplitude and continuous phase regulation at the same time

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