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.***

本计画将研究分形/微腔复合材料的光学特性。 该复合材料由大约1.8微米的纳米尺寸的金属分形聚集体形成，嵌入在直径为几百微米的特征尺寸的电介质腔中。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。 先前的实验已经表明，来自这些系统的光谱发射表现出巨大的增强因子（定义为存在和不存在复合物的光强度的比率），其可以大于10*15，并且对于某些特殊情况，大于10*21。学生将参与这项研究。 他们将因此获得技能和知识，为将来在工业、政府或企业就业做好准备。%一种能够增加光信号强度的装置，即，光放大器将在科学技术中有许多用途。该项目涉及研究一类引人注目的光学材料的光学特性，即所谓的分形/微腔复合材料，它可以将光放大很大的倍数。这两种成分中的每一种都有助于放大。在合成物中，这些贡献联合收割机以倍增的方式结合在一起，从而产生真正巨大的放大效果。 在先前的实验中，观察到超过1个四次方（1后跟15个零）的扩增因子。光信号的最终放大预计会更大，正是为了实现这一目标，这项赠款支持的研究正在进行。 这项研究将吸引学生的参与，他们将获得技能和知识，为工业，政府实验室和企业的高级研究和就业做准备。