Nanostructures for Assisted Spectroscopy and Nonlinear Optics

用于辅助光谱学和非线性光学的纳米结构

• 批准号: 435948-2013
• 负责人: Razzari, Luca
• 金额: $ 1.68万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=552948
• 关键词: Nanostructures; Assisted; Spectroscopy; Nonlinear; Optics

One of the next frontiers of integrated photonics is represented by the challenge of extending the use of optical techniques to nanometer length scales, overcoming the limit imposed by diffraction, which does not allow focusing light on dimensions smaller than roughly half a wavelength. Metallic nanoplasmonic structures have proven to be an efficient way to "squeeze" light on such dimensions, significantly enhancing the local field at the same time. These properties have been recently exploited for several applications in the visible spectral region including, for example, enhanced Raman scattering and single-molecule fluorescence. Given this unquestionable interest, I aim at developing at INRS-EMT a vigorous research program regarding the exploitation of nanoplasmonics in the mid-infrared (~2 - 20 µm) and terahertz (~20 - 1000 µm) regions of the electromagnetic spectrum. In the framework of the present Discovery Grant, I intend to shed some light on the use of metallic nanostructures for assisting long-wavelength direct-absorption spectroscopies and nonlinear optics. More specifically, in the next five years, I will study: (i) the possibility of employing arrays of "nanoantennas" for enhancing terahertz spectroscopy of biomolecules, in view of some exciting applications in the early diagnosis of diseases; (ii) localized terahertz nonlinear optics mediated by nanoplasmonics, for its fundamental interest and for its possible use in next-generation terahertz nanoelectronic devices; (iii) a novel kind of mid-infrared nanoscope, capable of acquiring chemical maps of surfaces with nanometric resolution; and (iv) new nanoplasmonic tools for boosting mid-infrared nonlinear optical processes for applications in silicon photonics.

集成光子学的下一个前沿领域之一是将光学技术的使用扩展到纳米长度尺度，克服衍射所带来的限制，该限制不允许将光聚焦在小于大约半波长的尺寸上。已被证明是在这种尺寸上“挤压”光的有效方法，同时显着增强局部场。这些特性最近已被用于可见光谱区域的多种应用，包括增强拉曼散射等。鉴于这种不容置疑的兴趣，我的目标是在 INRS-EMT 开发一项关于中红外（~2 - 20 µm）和太赫兹（~20 - 1000 µm）区域纳米等离子体技术开发的强有力的研究计划。在目前的发现补助金的框架内，我打算阐明使用金属纳米结构来辅助长波长直接吸收。更具体地说，在接下来的五年中，我将研究：（i）考虑到在疾病早期诊断中的一些令人兴奋的应用，使用“纳米天线”阵列来增强生物分子的太赫兹光谱的可能性； (ii) 由纳米等离子体介导的局域太赫兹非线性光学，其根本利益及其在下一代太赫兹纳米电子器件中的可能用途； (iii) 一种新型中红外纳米显微镜，能够获取纳米分辨率的表面化学图；(iv) 新型纳米等离子体工具，用于促进硅光子学应用中的中红外非线性光学过程。