Nonlinear Optics of Nanocomposites in Microcavities

微腔中纳米复合材料的非线性光学

• 批准号: 0071901
• 负责人: Robert Armstrong
• 金额: $ 28.5万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0071901&HistoricalAwards=false
• 关键词: Nonlinear; Optics; Nanocomposites; Microcavities

The optical characteristics of fractal/microcavity composites will be investigated in this project. The composites are formed from nanometer-size metal fractal aggregates of approximate size 1.8 micrometers, embedded in a dielectric cavity of characteristic size several hundred micrometers in diameter. A variety of nonlinear emissions from the composites will be investigated including lasing, multiphoton absorption, and hyper-Raman scattering. Previous experiments have shown that the spectral emissions from these systems exhibit enormous enhancement factors (defined as the ratio of the optical intensity with and without the presence of the composite), which can be greater than 10*15 and, for certain special cases, greater than 10*21. Students will participate in this research. They will thereby acquire skills and knowledge that prepares them for future employment in industry, government or academe.%%%A device capable of increasing the intensity of a light signal, i.e., an optical amplifier, will have many uses in science and technology. This project concerns the study of the optical properties of a remarkable class of optical materials, so-called fractal/microcavity composites, which amplify light by enormous factors. Each of the two components contributes to the amplification. In the composite these contributions combine multiplicatively so that the resulting amplification can be truly enormous. In previous experiments amplification factors in excess of 1 quadrillion (1 followed by 15 zeroes) were observed. The ultimate amplification of light signals is expected to be even greater and it is towards this end that the studies supported by this grant are undertaken. This research will engage the participation of students who will thereby acquire skills and knowledge in preparation for advanced studies and employment in industry, government laboratories, and academe.***

本课题将对分形/微腔复合材料的光学特性进行研究。这种复合材料是由大约1.8微米大小的纳米级金属分形聚集体嵌入到直径数百微米的介质腔中形成的。将研究复合材料的各种非线性发射，包括激光、多光子吸收和超拉曼散射。以前的实验表明，这些系统的光谱发射表现出巨大的增强因子(定义为在有和没有复合材料存在的情况下的光学强度的比率)，可以大于10*15，在某些特殊情况下，大于10*21。学生将参与这项研究。因此，他们将获得技能和知识，为将来在工业、政府或学术界就业做准备。%能够增加光信号强度的设备，即光学放大器，在科学和技术中将有许多用途。这个项目涉及到一类重要的光学材料的光学性质的研究，即所谓的分形/微腔复合材料，它通过巨大的因素放大光。这两种成分中的每一种都有助于放大。在复合体中，这些贡献相乘地结合在一起，因此产生的放大效应可能确实是巨大的。在以前的实验中，观察到放大倍数超过1千万亿(1后面跟着15个零)。预计光信号的最终放大作用将更大，为此开展了这笔赠款支持的研究。这项研究将吸引学生参与，他们将因此获得技能和知识，为进修和在工业、政府实验室和学术界就业做准备。