Ultrathin optical lens construction method based on artificial microstructure super surface

An artificial microstructure and optical lens technology, which is applied in optics, lenses, optical components, etc., can solve the problems of large volume of optical lenses and the inability of curved surface design to meet the integration requirements, and achieve easy integration, low loss, and high transmittance Effect

An artificial microstructure and optical lens technology, which is applied in optics, lenses, optical components, etc., can solve the problems of large volume of optical lenses and the inability of curved surface design to meet the integration requirements, and achieve easy integration, low loss, and high transmittance Effect

CN105487145AActive Publication Date: 2016-04-13ZHEJIANG UNIV
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  • Ultrathin optical lens construction method based on artificial microstructure super surface
  • Ultrathin optical lens construction method based on artificial microstructure super surface
  • Ultrathin optical lens construction method based on artificial microstructure super surface

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Embodiment 1

[0059] Effect of Artificial Microstructured Metasurface Constructing Ultrathin Optical Lens.

[0060] According to the above design method, an ultra-thin optical lens with an operating wavelength of 1550nm and insensitive to polarization is designed, and relevant simulation verification is carried out.

[0061] Since it is not sensitive to the polarization direction of the incident electromagnetic wave, so Figure 4 The structures designed in are all circular, that is, in Figure 3(b), for the same structural unit, its diameter 1 is equal to diameter 2. The period is 700nm and the height of the silicon cylinder is 1100nm. First calculate the phase delay of its transmission at different radii, the simulation results are as follows Figure 5 shown. It can be seen that as the radius of the silicon cylinder gradually increases from 50nm to 270nm, the phase delay (gray curve) gradually decreases with the increase of the radius, and the phase change of 2π is completed in the range...

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Abstract

The invention discloses an ultrathin optical lens construction method based on an artificial microstructure super surface. The ultrathin optical lens construction method comprises the following steps that step (1) required working wavelengths are selected within the range from visible light to intermediate infrared wavelength bandwidth of 600nm-20 microns; incident light irradiates to the artificial microstructure super surface, and phase distribution on the artificial microstructure super surface is calculated according to the required positions of emergent focus points; step (2) rotationally symmetrical periodic structures are designed according to a certain period, and concrete phase values are determined through combination of the obtained phase gradient distribution and the periodic structure units on the surface; and step (3) columnar structures of determined height are selected to act as basic units of the artificial microstructure super surface, and corresponding concrete realization structures are designed according to the phase requirement of each basic unit. The effect of an optical lens at the macro level is realized by the micro-nano structures, the optical size is extremely low under the condition of maintaining high transmittance, and the optical lens is a double-plane lens.

Description

technical field [0001] The invention belongs to the field of micro-nano optics and optical chip integration, and in particular relates to a method for constructing an ultra-thin optical lens based on an artificial microstructure metasurface. Background technique [0002] Optical lenses are commonly used optical components in people's daily life, including mobile phones, cameras, video recorders, etc., and also play an important role in industrial production and national defense. Usually the lenses used are bulky and have at least one curved surface. However, with the development of science and technology, the functions of human-made equipment are becoming more and more complex, and more and more of them need the cooperation of light, mechanics and electricity. Traditional optical lenses are bulky and curved surface design can no longer meet the increasing integration requirements. How to effectively combine the existing mature semiconductor technology to solve the above pr...

Claims

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Application Information

Patent Timeline
13 Apr 2016
Publication
CN105487145A
IPC
G02B3/00
CPC
G02B3/0037
Inventors
马云贵; 元军