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基于ATR技术的有机聚合物二次电光系数的测量 总被引:1,自引:1,他引:0
二次电光效应是有机聚合物材料一种重要的电光特性,利用这种特性可以制备有机聚合物电光调制器等电光器件.有机聚合物材料的二次电光系数是衡量其二次电光效应的一个重要参数,其可以用一个6×6阶的张量来表示.利用该张量的对称特性、各个元素之间的已知关系以及折射率椭球公式,本文提出了一种基于衰减全反射(ATR)技术的测量有机聚合物二次电光系数的方法.在测量中,通过选用TM偏振光以及TE偏振光作为测量光束,可以分别获得二次电光系数张量中S11以及S12元素.利用已知关系,可以计算得到S44以及直流克尔系数.从而得到二电光系数张量中所有元素的值. 相似文献
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有机二阶非线性光学材料的材料设计研究进展 总被引:3,自引:0,他引:3
综述了有机二阶非线性光学材料的材料设计研究进展,详细讨论了插层材料,极化有机聚合物和有机无机复合材料的研究现状和未来的研究方向。 相似文献
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光折变聚合物的研究进展 总被引:1,自引:0,他引:1
近年来,聚合物光折变材料越来越受到人在关注,因为民无机材料相比,聚合物材料有较高的电光系数,较高的光损伤阈值,低的直流电常数,而且易于加工,所以光折变聚合物材料显示光明的应用前景,文中介绍了光折变产生的简单的机理,以及目前国际上所研究的各类材料及发展状况。 相似文献
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具有激发态性质的新型有机半导体材料 总被引:2,自引:0,他引:2
高度评价了国内在三线态有机电致发光材料、有机半导体复合材料中的光伏极性反转、共轭聚合物中的光致极化反转的研究中取得的创新性成果,旨在增加研究者对有机半导体材料激发态及其性质的研究这一新兴领域的了解和认识,引起学术界对激发态有机半导体材料的深思与讨论,共同探索有机光电信息材料研究领域中创新的源头。 相似文献
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报道了反射型电光调制法研究6种偶氮化合物的线性电光效应,分析了给体-受体强度、掺杂浓度对线性电光系数的影响。结果表明,掺杂偶氮化合物4-「2-羟乙基苯甲氨基」-4-硝基偶氮苯的极化聚合物薄膜具有较强的线性电光效应,其线性电光系数随参杂浓度的增大而增大。 相似文献
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溶剂法制备聚合物分散液晶膜 总被引:5,自引:0,他引:5
用溶剂法制备了聚合物分散液晶膜。采用偏光显微镜、扫描电子显微镜和电光仪对相分离和聚合物分散液晶材料的电光性能作了初步探讨。研究结果表明,升温速度和聚合物含量对PDLC膜的相分离结构和响应电压有显著的影响。 相似文献
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Ultraviolet photobleaching process of azo dye doped polymer and silica films for fabrication of nonlinear optical waveguides 总被引:7,自引:0,他引:7
We describe the effect of UV photobleaching of poled polymer and silica films and the application of UV photobleaching to waveguide-type optical devices. Disperse Red 1-doped poled polymer and silica films with large and stable second-order nonlinearity were used as nonlinear optical materials. We investigated the mechanism of UV photobleaching of poled films by the changes in absorption spectrum and nonlinearity and refractive index. Moreover, simple fabrication of both the channel waveguide and the chi((2)) diffraction grating based on UV photobleaching is demonstrated. 相似文献
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由于极化聚合物在集成光电子学领域的潜在应用前景已经引起广泛关注 ,而聚酰亚胺由于其优异的热稳定性、电性能和机械性能以及在微电子工业的广泛应用 ,使得聚酰亚胺基二阶非线性光学材料倍受重视。本文在简要介绍极化聚合物基本知识的基础上 ,综述了近几年来聚酰亚胺基二阶非线性光学材料的研究进展 ,主要介绍了聚酰亚胺及其生色团的设计与合成 ,其极化方法和松弛机理的研究 相似文献
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Basic principles of the present optoelectronic research activities at Hoechst AG are presented in this contribution. Within the diversified broad band spectrum of optoelectronic materials and applications our interest is focused on new types of polymer optical fibers and nonlinear optical device principles using organic Langmuir–Blodgett films and electrically poled polymers. The basic principles and the limits of the present research and development activities which, have a high market potential are outlined. 相似文献
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We have performed calculations and measurements of the efficacy of two poling geometries of poled electro-optic (EO) polymer films for use in sensing terahertz (THz) radiation via EO sampling. Taking reflective and absorptive losses into consideration, we find that a parallel-plate (PP) poled film has a sensitivity maximum when oriented at 55 degrees to the incident probe and THz beams. In addition, we show that our in-plane (IP) poled polymer films are comparable in sensitivity to PP-poled films and discuss the potential for improving IP-poled polymer devices. 相似文献
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报导了一种新型含有五员呋喃杂环非线性光学生色团,并且引入到聚甲基丙烯酸甲酯侧链中。旋转涂膜后,采用电晕极化、紫外-可见光谱研究表明色团虽然具有较大共轭长度,其截止吸收波长却很小。同是该聚合物聚向稳定性很好。 相似文献
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A simple fabrication technique for nonlinear polymeric optical waveguide patterns is introduced based on the two-beam interference method. We determined that the second-order nonlinearity of poled polymer films is erased by single-pulse ultraviolet (UV) laser irradiation. The erasure mechanism for second-order nonlinearity is discussed. To form a periodic structure in an optical polymer waveguide, two types of optical configuration of two-beam interference were arranged, and a single-pulse UV laser was exposed directly onto poled films. We prove that this method provides a simple way to fabricate volume-type and ridge-type periodically poled structures, i.e., chi((2)) gratings, from the submicrometer to the millimeter range. 相似文献
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The interferometric method for measuring the linear electro-optic coefficients of polymer films has been improved. This improved method is based on using the antipiezoelectric effect of a quartz crystal to compensate for the change in the optical path length that is due to the electro-optic effect of a polymer film. The electro-optic coefficients of six kinds of new poled polymer film have been determined at a wavelength of 633 nm by this new method. This technique offers a simple, rapid, and highly sensitive method for measuring the electro-optic coefficients of polymer films. 相似文献
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将新型有机非线性光学分子DCDHF-2-V按一定比例掺入聚甲基丙烯酸甲酯(PMMA)中,采用旋涂方法制备聚合物薄膜。为了得到宏观二阶非线性光学特性,在90℃对薄膜进行电晕极化,形成各向异性。对极化前后的薄膜进行紫外/可见光吸收频谱分析和原子力显微镜分析。采用RHF方法在6-31G基组上对DCDHF-2-V/PMMA薄膜体系中的DCDHF-2-V分子和PMMA进行闭壳层Hartree-Fock理论计算,得到它们的一阶超极化率β分别为60.278755×10-30esu和10.902267×10-34esu。 相似文献
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Huang S Luo J Yip HL Ayazi A Zhou XH Gould M Chen A Baehr-Jones T Hochberg M Jen AK 《Advanced materials (Deerfield Beach, Fla.)》2012,24(10):OP42-OP47
Pyroelectric crystals are used as a conformal and detachable electric field source to efficiently pole electro-optic (E-O) polymers in both parallel-plate (transverse) and in-plane (quasi-longitudinal) configurations. Large Pockels coefficients in poled thin films and high tunability of resonance wavelength shift in hybrid polymer silicon slot waveguide ring-resonator modulators have been achieved using this method. 相似文献