光折变光子微结构的制备及其表征
发布时间：2018-07-16 18:47
【摘要】：光子微结构是一种性能优异的光子学材料,在实现人为操控光子运动方面具有十分诱人的应用前景,同时也为开发全光通信所需的光子学器件提供了新的可能。光子微结构制备技术的成熟和完善对推动光子微结构的研究深入以及实用化方面都具有重要的意义。然而,传统制备光子微结构的方法往往具有一定的局限性,存在设备复杂,制备难度大,结构单一,灵活程度低,制作效率不高,成本昂贵,不利于大规模生产等缺点。光感应技术是近些年发展起来的一种制备光子微结构的新方法。它主要利用光折变介质的光致折射率变化特性,通过调制入射光的空间强度分布来形成折射率微结构,具有简便、灵活、成本低、易于实现、材料可循环使用等优势。目前绝大部分有关光感应法制备光子微结构的报道都制作的是周期性微结构,且普遍存在制作面积小,效率不高等问题。对于折射率分布呈现非周期形态的复杂光子微结构(如准晶光子微结构和复合周期光子微结构),由于制作难度大,相关的研究进展一直较为缓慢。针对上述问题,本论文以光感应技术为基础,对在掺铁铌酸锂光折变晶体中制作各种类型光子微结构进行了系统深入的研究。论文的主要工作和创新点如下：1.提出了一种非常简单、廉价的实验装置,利用多针孔板和透镜傅里叶变换相结合的方式实现了任意多束相干平面波的干涉。克服了传统多光束干涉装置复杂,难以调节,不易于实现的缺点,并具有灵活的可扩展性。在掺铁铌酸锂晶体中首次制作出二维和三维的准晶形态光子微结构。进一步使用导波强度图像、远场衍射图案,以及布里渊区光谱等实验手段对晶体内制作的准晶光子微结构进行了验证和表征。2.针对目前光子微结构制备效率低,制作面积普遍偏小的缺点,提出了两种在光折变材料中制备大面积二维光子微结构的实验方案,分别使用多透镜板和多楔面棱镜的方法来产生大面积多光束干涉光场。这两种方法都比较简单,不需要复杂的调节装置,稳定性好,成本低,制作效率高。在掺铁铌酸锂晶体中制作出了大面积的二维周期性光子微结构和准晶光子微结构,极大地提高了光折变光子微结构的制备效率。并使用多种实验方法对制作的大面积光子微结构进行了验证和分析。多透镜板和多楔面棱镜的方法都具有良好的可扩展性,通过适当的设计能够制作多种更复杂的大面积光子微结构。3.首次在铌酸锂类晶体中制作出复杂类型光子微结构。使用多光束干涉和投影成像的方法在掺铁铌酸锂晶体中分别制作了复合周期光子微结构、波浪状栅格微结构,以及带有点状、线状、点阵缺陷的光子微结构。这些工作成功地解决了传统光子微结构制备技术中不易引入缺陷和难以实现任意形状光子微结构制备的难题。两种制作方法都具有易于操作,可扩展性强的优点。制作的复杂类型光子微结构为研究光学微腔和微结构波导的非线性光学特性提供了一个良好的实验媒介,在集成光学和微结构光波导器件领域具有良好的应用前景。4.利用光学上的布拉格衍射现象对制作的光折变光子微结构进行定量分析。以制作的二维大面积四方晶格光子微结构为测试对象,从实验上对光子微结构进行了布拉格衍射测量。通过探测光正向入射和侧向入射两种方式,对光子微结构的折射率晶面间距进行了测定,实验结果和理论预测相吻合。对光子微结构进行布拉格衍射特性分析,使我们掌握了一种定量表征光子微结构的方法。这些工作有利于进一步量化研究光子微结构的各种特性,促进相关微结构光子器件的开发和应用。
[Abstract]:Photonic microstructures is a kind of excellent photonics material. It has a very attractive application prospect in the realization of human manipulation of photon motion. It also provides a new possibility for the development of photonics devices needed for all optical communication. However, the traditional methods of fabrication of photonic microstructures are often limited. There are complex equipment, difficult preparation, single structure, low flexibility, low production efficiency and high cost, which are not conducive to large scale production. A new method of submicrostructures. It mainly uses the photorefractive refractive index change characteristics of the photorefractive medium to form the refractive index microstructures by modulating the spatial intensity distribution of the incident light. It has the advantages of simple, flexible, low cost, easy to realize, and recycled materials. The fabrication is periodic microstructures, and there is a general problem of small production area and low efficiency. For the complex photonic microstructures, such as quasicrystal photon microstructures and complex periodic photon microstructures, which have a non periodic form of refractive index distribution, the related research progress has been slow because of the difficulty in making the refractive index. Based on optical induction technology, the fabrication of various types of photonic microstructures in iron doped lithium niobate photorefractive crystals is systematically studied. The main work and innovation of this paper are as follows: 1. a very simple and cheap experimental device is proposed, which is realized by the combination of multi pinhole plate and mirror Fourier transform. The interference of the coherent multi beam coherent plane waves overcomes the shortcomings of the traditional multi beam interferometer, which is difficult to adjust and can not be easily realized, and has the flexibility of extensibility. For the first time, two and three dimensional quasicrystal photonic microstructures have been fabricated in the lithium doped lithium niobate crystal. The further use of the guided wave intensity image, the far-field diffraction pattern, and the brie are also used. The microstructures of quasicrystal photons made in the crystal are verified and characterized by the abyss spectroscopy. Two kinds of Photorefractive Photonic microstructures in photorefractive materials are proposed for the low efficiency of the photonic microstructures and the small size of the fabrication area in the photorefractive materials. Two kinds of Photorefractive Photonic microstructures are used in the photorefractive materials, and the multi lens and multi wedge surfaces are used respectively. The prism method produces large area and multi beam interference light fields. These two methods are relatively simple, do not need complex regulators, have good stability, low cost, and high efficiency. A large area of two-dimensional periodic photon microstructures and quasicrystal photonic microstructures have been produced in the lithium doped lithium niobate crystal, which greatly improves the photorefractive photon microstructures. A variety of experimental methods have been used to verify and analyze the large area photonic microstructures made by a variety of experimental methods. The methods of multi lens and multi wedge prisms have good extensibility. Through appropriate design, a variety of more complex large area photonic microstructures.3. can be produced in lithium niobate crystals for the first time. Complex photonic microstructures have been fabricated by multi beam interference and projection imaging in the iron doped lithium niobate crystals. The photonic microstructures, wavy grid microstructures, and photon microstructures with dot, linear and dot matrix defects have been successfully solved in the traditional photonic microstructure preparation technology. The two fabrication methods are easy to operate and have strong extensibility. The fabrication of Complex Photonic microstructures provides a good experimental medium for the study of the nonlinear optical properties of optical microcavity and microstructural waveguides, and the integrated optics and microstructures are integrated. The field of optical waveguide devices has a good prospect in the field of.4.. The photorefractive photon microstructures produced by the optical Prague diffraction are quantitatively analyzed. The photon microstructures of a two-dimensional large square square lattice are made as the test object, and the micro structure of the photons is measured in Prague. Two methods of incidence and lateral incidence are used to determine the spacing of the refractive index of the photon microstructures. The experimental results are in agreement with the theoretical prediction. The analysis of the diffraction characteristics of the photonic microstructures in Prague makes us master a method of quantitative characterization of the photonic microstructures. These work are beneficial to the further quantitative study of the photonic microstructures. These characteristics promote the development and application of photonic devices related to microstructures.
【学位授予单位】：华东师范大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TN204
，
本文编号：2127305
[Abstract]:Photonic microstructures is a kind of excellent photonics material. It has a very attractive application prospect in the realization of human manipulation of photon motion. It also provides a new possibility for the development of photonics devices needed for all optical communication. However, the traditional methods of fabrication of photonic microstructures are often limited. There are complex equipment, difficult preparation, single structure, low flexibility, low production efficiency and high cost, which are not conducive to large scale production. A new method of submicrostructures. It mainly uses the photorefractive refractive index change characteristics of the photorefractive medium to form the refractive index microstructures by modulating the spatial intensity distribution of the incident light. It has the advantages of simple, flexible, low cost, easy to realize, and recycled materials. The fabrication is periodic microstructures, and there is a general problem of small production area and low efficiency. For the complex photonic microstructures, such as quasicrystal photon microstructures and complex periodic photon microstructures, which have a non periodic form of refractive index distribution, the related research progress has been slow because of the difficulty in making the refractive index. Based on optical induction technology, the fabrication of various types of photonic microstructures in iron doped lithium niobate photorefractive crystals is systematically studied. The main work and innovation of this paper are as follows: 1. a very simple and cheap experimental device is proposed, which is realized by the combination of multi pinhole plate and mirror Fourier transform. The interference of the coherent multi beam coherent plane waves overcomes the shortcomings of the traditional multi beam interferometer, which is difficult to adjust and can not be easily realized, and has the flexibility of extensibility. For the first time, two and three dimensional quasicrystal photonic microstructures have been fabricated in the lithium doped lithium niobate crystal. The further use of the guided wave intensity image, the far-field diffraction pattern, and the brie are also used. The microstructures of quasicrystal photons made in the crystal are verified and characterized by the abyss spectroscopy. Two kinds of Photorefractive Photonic microstructures in photorefractive materials are proposed for the low efficiency of the photonic microstructures and the small size of the fabrication area in the photorefractive materials. Two kinds of Photorefractive Photonic microstructures are used in the photorefractive materials, and the multi lens and multi wedge surfaces are used respectively. The prism method produces large area and multi beam interference light fields. These two methods are relatively simple, do not need complex regulators, have good stability, low cost, and high efficiency. A large area of two-dimensional periodic photon microstructures and quasicrystal photonic microstructures have been produced in the lithium doped lithium niobate crystal, which greatly improves the photorefractive photon microstructures. A variety of experimental methods have been used to verify and analyze the large area photonic microstructures made by a variety of experimental methods. The methods of multi lens and multi wedge prisms have good extensibility. Through appropriate design, a variety of more complex large area photonic microstructures.3. can be produced in lithium niobate crystals for the first time. Complex photonic microstructures have been fabricated by multi beam interference and projection imaging in the iron doped lithium niobate crystals. The photonic microstructures, wavy grid microstructures, and photon microstructures with dot, linear and dot matrix defects have been successfully solved in the traditional photonic microstructure preparation technology. The two fabrication methods are easy to operate and have strong extensibility. The fabrication of Complex Photonic microstructures provides a good experimental medium for the study of the nonlinear optical properties of optical microcavity and microstructural waveguides, and the integrated optics and microstructures are integrated. The field of optical waveguide devices has a good prospect in the field of.4.. The photorefractive photon microstructures produced by the optical Prague diffraction are quantitatively analyzed. The photon microstructures of a two-dimensional large square square lattice are made as the test object, and the micro structure of the photons is measured in Prague. Two methods of incidence and lateral incidence are used to determine the spacing of the refractive index of the photon microstructures. The experimental results are in agreement with the theoretical prediction. The analysis of the diffraction characteristics of the photonic microstructures in Prague makes us master a method of quantitative characterization of the photonic microstructures. These work are beneficial to the further quantitative study of the photonic microstructures. These characteristics promote the development and application of photonic devices related to microstructures.
【学位授予单位】：华东师范大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TN204
，
本文编号：2127305
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