A preparation method of micro-nano structure modulation microsphere lens focusing element

Abstract

The invention provides a method for preparing a micro-nano structure modulated microballoon lens focusing element. The method is characterized by comprising the following steps that 1, a phase modulating film is arranged on a polarization sensitive film, and a composite layer film is formed; 2, the phase modulating film on the composite layer film is processed to be of a wave-front phase regulation micro-nano structure; 3, a microballoon lens is covered with the processed composite film; 4, a rigid substrate is arranged below the microballoon lens, after acting force is applied to the rigid substrate, the microballoon lens is wrapped by the processed composite film, the rigid substrate is removed, and the micro-nano structure modulated microballoon lens focusing element is obtained. The method for preparing the micro-nano structure modulated microballoon lens focusing element is simple and easy to implement, functional performance expandability is high, optimization of a wave-front phase on light beam focusing is achieved, and vector light microballoon lens focusing is achieved.

Description

technical field [0001] The invention relates to a method for preparing a focusing element of a microsphere lens, in particular to a method for preparing a focusing element of a microsphere lens with a micronano structure. Background technique [0002] Optical focusing system research is one of the hotspots in optical research. It is widely used in optical microscopy, optical processing, optical micro-manipulation, optical imaging, photoelectric measurement, photochemistry, optical coding, optical illumination, fluorescence excitation, photoelectric detection and other fields. critical use. [0003] The focusing element is the core component in the optical focusing system. For example, in the field of optical microscopy, in order to achieve ideal beam focusing and obtain a small focused spot, a variety of technologies have been proposed and implemented, including increasing the numerical aperture of the concentrating system and reducing the wavelength of the working light, w...

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Problems solved by technology

) et al. and Z.Wang, W.Guo, L.Li, B.Luk'yanchuk, A.Khan, Z.Liu, (Z.Chen, and M.HongZ.Wang, W.Guo, L.Li, B.Luk'yanchuk, A.Khan, Z.Liu, Z.Chen, and M.Hong, "Optical virtual imaging at 50nm lateral resolution with a white-light nanoscope," Nat.Commun.2, 218 (2011)) proposed by others A kind of microsphere lens element that is used for beam focusing has been proposed, although the microsphere lens element of this beam focusing has certain advantages, there are still shortcomings, specifically as follows: (1) the working principle of the microsphere lens that adopts is exactly to utilize the light beam The optical propagation behavior with the lens, the beam refraction and reflection in the geometrical optics category, and the effect of the spherical interface on the light wave in the wave optics category, essentially cannot play the role of wavefront phase in optimizing the beam focusing

(2) The light field has vector characteristics in nature, and the vector characteristics can significantly affect the beam focusing degree and behavior. The microsphere lens elements in the two papers cannot realize vector beam conversion and optimization, and cannot achieve single-device vector beam microsphere lens focusing

(3) In essence, there is a limit of beam focusing behavior. The microsphere lens elements in the two papers cannot exert the working principle of breaking through the limit of beam focusing behavior, and the scalability of function and performance is not strong.

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