一维双链钙钛矿C_(5)H_(16)N_(2)Pb_(2)I_(6)的光学各向异性(特邀)  

Optical Anisotropy of One-dimensional Double Chain C_(5)H_(16)N_(2)Pb_(2)I_(6) Perovskites(Invited)

作　　者：王海珍 程雪 林庭浩 李德慧 WANG Haizhen;CHENG Xue;LIN Tinghao;LI Dehui(School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学光学与电子信息学院,武汉430074

出　　处：《光子学报》2023年第3期157-165,共9页Acta Photonica Sinica

基　　金：国家自然科学基金(No.62074064)。

摘　　要：研究了一维双链钙钛矿材料C_(5)H_(16)N_(2)Pb_(2)I_(6)的光学各向异性。采用水相法合成了一维双链钙钛矿C_(5)H_(16)N_(2)Pb_(2)I_(6)晶体,采用光谱对其进行表征,其荧光发射的线性二色比可达17.4,高于已报道的一维单链C4H14N2PbI4钙钛矿。表明降低晶体的对称性可用于提高光学各向异性。进一步通过KramersKronig关系获得钙钛矿的复介电常数及其双折射和二色性,其中二色性和双折射分别达到了1.5和1.3。In addition to amplitude,frequency and phase,the polarization states of light can also carry information and thus will find important applications in imaging,medical detection and optical communication.Traditionally,the generation and detection of polarized light mainly rely on the combination of commercial unpolarized light sources and photodetectors with polarizer and wave plate,which are usually bulky and costly.Therefore,it is urgent to develop alternative strategies to achieve onchip compact polarized light source and detector.Optical anisotropy is related to the polarization response of optoelectronic devices,which is the basis for polarization optical elements such as polarizers,wave plates,and phase matching devices.The study on the optical anisotropy is of great significance for polarizationsensitive photodetectors and light emitting devices.In recent years,perovskites have received extensive attention due to their prominent optoelectronic properties and potential applications in optoelectronic devices.In particular,one dimensional perovskites are expect to exhibit large optical anisotropy due to the crystalline structure anisotropy.Together with the excellent optoelectronic properties of perovskites,we anticipate that one dimensional perovskites will find promising potential applications in the polarizationresolved optics.However,its optical anisotropy has been rarely reported.Our previous study has reported on the optical anisotropy of one-dimensional single chain perovskites,which exhibits a large emission linear dichroic ratio of 5.5 at room temperature.Nevertheless,this linear dichroic ratio is still not large enough for certain polarization resolved applications and far smaller than the linear dichroic ratio of the commercial optical elements.In this end,it is necessary to explore new materials to enhance the optical anisotropy.According to previous reports,it is possible to further increase the optical anisotropy by reducing the symmetry of the crystalline structure of a materials.By reducing the

关 键 词：一维 双链钙钛矿 各向异性 二色性 双折射 线性二色比 

分 类 号：O43[机械工程—光学工程]