The Simulative Investigation And Optimization Design Of Photon Sieve

The study of novel optical element photon sieve was presented in this dissertation. As a novel diffractive optical element, the photon sieve can be utilized to focuse soft-X Ray and ultraviolet light, the diameter of the focus spot being very tiny, beyond the Rayleigh diffraction limit. Further, the photon sieve can suppress the high order diffraction and side-lode effect, which happen in the focusing of Fresnel zone plates. The photon sieve is small and lightweight, thus it has applications in many domains such as photo lithography, large aperture space telescope, bionic eyes, THz wave holography. The dissertation presented a systematic study about the photon sieve. The contents and the innovation can be generalized as:1. The imaging theory of the photon sieve. Based the Fresnel-Kirchhoff scalar diffraction theory, the focusing character in the far field was analysed. The focusing of the single hole in the photon sieve is deduced, which provided an evidence for the design and the optimization of the photon sieve.2. The simulation of the photon sieve. The Schematic picture and imaging simulative pictures in the focus of the photon sieve was given out. The prime Window functions were used to optimize the distribution of the holes of the photon sieve. The influence of the diameter of the holes upon the focusing intensity is studied. The parameters of the photon sieve are optimized for better focusing of photon sieve.3. The phase-photon sieve. To increase the diffraction efficiency of the photon sieve, the phase-photon sieve is designed. The theoretical analysis and simulative results were presented. The simulative results illustrate that the diffraction efficiency of phase-photon sieve is four times higher than that of amplitude-photon sieve.4. Photon sieve with the ability of focusing incident light with multiple wavelengths. The dispersion of the photon sieve was analysed. The photon sieves for different wavelengths were in different regions of one element. The focus position of the photon sieves can be designed according to the requirements. The photon sieves with the ability of focusing multiple wavelengths can applied in the visible - infrared lights combinational optical systems.5. The design of the axial scanning optical system. The focusing characters of the vibrating photon sieve is analysed by use of the software ANSYS 10.0. The simulative results show that during the vibrating, the ideal focusing spot would motion according the adopted amplitude, implementing frequency dynamic focus.The achievement of this dissertation laid the foundation of the future further investigation, providing a possible application of the photon sieve, which may excite new ideas for the application of the novel optical element.