Dispersion of Optical Nonlinearities in Solids
固体中光学非线性的色散
基本信息
- 批准号:9120590
- 负责人:
- 金额:$ 31.34万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1992
- 资助国家:美国
- 起止时间:1992-04-15 至 1996-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project will pursue a basic research program aimed toward developing a fundamental understanding of the nonlinear response of optical materials. Our past research was initially aimed at two-photon absorption (2PA) in semiconductors. This goal led to a predictive capability for 2PA coefficients not only for semiconductors but also for wide gap dielectrics. A difficulty encountered in these experiments is that nonlinear refraction always accompanies nonlinear absorption so that an understanding of the origins of this nonlinear refraction is also needed. Therefore, we broadened the scope of the program. We have developed a new, accurate and sensitive measurement technique, the Z-scan, which can give the sign and magnitude of nonlinear refraction as well as nonlinear absorption. This technique is rapidly gaining wide acceptance as a standard measurement and gives complementary information to other methods that we use such as four-wave mixing. This technique is being used to rapidly increase the data base of nonlinear materials constants. Our measurements to date show both bound and photogenerated carrier nonlinearities. The free-carrier nonlinearities are well predicted by band blocking models. The fast bound electronic refraction n2 is given by a Kramers-Kronig (KK) integral of the nonlinear absorption spectrum including 2PA, electronic Raman and AC-Stark contributions. We established this theory and demonstrated agreement with experiment over a four orders of magnitude change in n2 including a sign change for semiconductors and dielectrics. We propose to study the nondegenerate nonlinearities (eg. n2 at w1 due to w2) which are also predicted by the theory. The outcome of these studies, besides the data base, will be the establishment of a predictive capability for use by optoelectronic device researchers to determine nonlinear coefficients of other materials at other wavelengths including dual wavelength applications. These materials constants are important, for example, for applications in all optical switching, optical limiting, and laser-induced damage. In addition, we have recently observed an effective X(3) caused by the cascading of X(2):X(2) in a second harmonic generating crystal (KTP) that looks quite promising for obtaining large nonlinear refraction for the fundamental. As several organic materials have been shown to have very high X(2)'s, we are initiating studies in organic materials of the cascaded as well as other nonlinearities (eg. in phthalocyanine dyes). Questions of the applicability of the KK analysis to classes of organic materials will be examined.
该项目将进行基础研究计划 旨在发展一种基本的 光学非线性响应的理解 材料. 我们过去的研究最初是针对 半导体中的双光子吸收(2 PA)。 这一目标导致了2 PA的预测能力 系数不仅用于半导体, 宽间隙电介质。 遇到的困难 非线性折射总是 伴随着非线性吸收, 了解这种非线性的起源 还需要折射。 因此,我们扩大了 该计划的范围。 我们开发了一种新的, 精确和灵敏的测量技术, Z扫描,可以给出 非线性折射以及非线性吸收。 这项技术正在迅速获得广泛的认可, 一个标准的测量,并给出了补充 我们使用的其他方法,如 四波混频 这项技术被用于 迅速增加非线性材料的数据库 constants. 我们迄今为止的测量显示, 束缚和光生载流子非线性。 自由载流子的非线性可以很好地预测, 带阻塞模型 快速绑定电子 折射率n2由Kramers-Kronig(KK)给出 非线性吸收光谱积分 包括2 PA、电子拉曼和AC-Stark 捐款. 我们建立了这个理论, 与实验结果一致, n2的数量级变化,包括符号 半导体和半导体的变化。 我们 建议研究非退化非线性 (例如:n2在w1由于w2),这也预测由 理论 这些研究的结果,除了 数据库,将建立一个预测 光电器件研究人员使用的能力 确定其他材料的非线性系数 在包括双波长 应用. 这些材料常数是 例如,对于所有光学应用, 开关、光限幅和激光诱导损伤。 此外,我们最近观察到, X(3)由X(2):X(2)在一秒内的级联引起 谐波发生晶体(KTP),看起来相当 有望获得大的非线性折射, 最基本的 正如几种有机材料一样, 被证明有很高的X(2),我们正在启动 研究有机材料的级联以及 其他非线性(例如,在酞菁染料中)。 关于KK分析适用于 将检查有机材料的类别。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Eric Van Stryland其他文献
Eric Van Stryland的其他文献
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{{ truncateString('Eric Van Stryland', 18)}}的其他基金
MRI: Development of Nonlinear Optical Spectrometer
MRI:非线性光谱仪的发展
- 批准号:
1229563 - 财政年份:2012
- 资助金额:
$ 31.34万 - 项目类别:
Standard Grant
Extremely Nondegenerate (END) Photonic Devices
极不简并 (END) 光子器件
- 批准号:
1202471 - 财政年份:2012
- 资助金额:
$ 31.34万 - 项目类别:
Standard Grant
Nonlinear Spectroscopy: Absorption and Refraction
非线性光谱:吸收和折射
- 批准号:
0524533 - 财政年份:2005
- 资助金额:
$ 31.34万 - 项目类别:
Standard Grant
Structure-Property Relations for Nonlinear Optical Materials
非线性光学材料的结构-性能关系
- 批准号:
0217932 - 财政年份:2002
- 资助金额:
$ 31.34万 - 项目类别:
Standard Grant
Nonlinear Spectroscopy (absorption, refraction and their relation) of Organic Materials
有机材料的非线性光谱(吸收、折射及其关系)
- 批准号:
9970078 - 财政年份:1999
- 资助金额:
$ 31.34万 - 项目类别:
Standard Grant
U.S.-Mexico Program: An Improved Z-Scan Technique
美国-墨西哥计划:改进的 Z 扫描技术
- 批准号:
9724813 - 财政年份:1998
- 资助金额:
$ 31.34万 - 项目类别:
Standard Grant
Investigation of the Dispersion of Nonlinear Absorption and Refraction in Organics
有机物中非线性吸收和折射色散的研究
- 批准号:
9510046 - 财政年份:1995
- 资助金额:
$ 31.34万 - 项目类别:
Continuing Grant
U.S.-Australia Joint Workshop on Nonlinear Optical Materialsand Devices; Orlando, Florida
美国-澳大利亚非线性光学材料与器件联合研讨会;
- 批准号:
9114636 - 财政年份:1992
- 资助金额:
$ 31.34万 - 项目类别:
Standard Grant
Travel Grant: RUI: Engineering of Two-Photon Nonlinearities in Bulk and Artificially Structured Semiconductors
旅费资助:RUI:块状和人工结构半导体中的双光子非线性工程
- 批准号:
8617066 - 财政年份:1987
- 资助金额:
$ 31.34万 - 项目类别:
Continuing Grant
Nonlinear Photoacoustics and Photoelectronics (Optical Eng- ineering)
非线性光声学和光电子学(光学工程)
- 批准号:
8310625 - 财政年份:1983
- 资助金额:
$ 31.34万 - 项目类别:
Continuing Grant
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