Dynamic studies of the linear optical properties of nanostructured media

纳米结构介质线性光学特性的动态研究

• 批准号: EP/E011578/1
• 负责人: Ronald Atkinson
• 金额: $ 55.68万
• 依托单位: Queen's University Belfast
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FE011578%2F1
• 关键词: Dynamic; studies; linear; optical; properties

The development, growth and future of our national economy will become increasingly dependent on scientific innovations in areas that are beyond the cutting edge of current technological capabilities. Nanotechnology is one such area that is already receiving a great deal of input internationally and in the UK, in terms of both scientific effort and financial investment. Advances in technological capability that include modern fabrication techniques and novel approaches to self-assembly of nanostructures, as well as advances in structural characterisation and theoretical understanding, are now stimulating a clear resurgence of interest in the individual and collective behaviour of near atomic-scale, man-made, structures that exhibit new and exciting physical properties.This particular proposal is concerned with the optical properties of nanostructured media in the form two-dimensional arrays of particles that, may or may not, lie within a more complicated multilayered thin film structure. The research team will fabricate 2D arrays of noble metal nanorods by a process of self-assembly that involve, industrially compatible, thin film processing techniques combined with electrochemical, anodisation and deposition, methods for the creation of structured matter on the nanoscale.The processes will be monitored using a variety of optical techniques including dynamic, real-time ellipsometry and photometry over a wide spectral range. These will be complemented by comprehensive post-fabrication processing and additional optical measurements in an attempt to gather a comprehensive set of observations of their anisotropic behaviour.In order to understand the optical data the team will build upon effective medium theories to explain observed behaviour. This will be done by invoking a discrete dipole approach (DDA) to deal with the response of individual nano-particles and their interactions with each other on the microscopic scale. The DDA approach treats each particle as an assembly of equivalent giant atoms that model the properties of odd-shaped media, subject to the limitations of available computing power.The objectives will be to develop the fabrication techniques, with the aim of generating new media; and observe and understand their collective anisotropic, optical behaviour in theoretical terms by extending or developing new 'atomistic-based' mathematical models.

我国国民经济的发展、增长和未来将越来越依赖于超出当前技术能力前沿的领域的科学创新。纳米技术就是这样一个领域，在科学努力和财政投资方面，它已经在国际上和英国得到了大量的投入。技术能力的进步，包括现代制造技术和纳米结构自组装的新方法，以及结构表征和理论理解的进步，现在刺激了人们对近原子尺度、人造结构的个体和集体行为的兴趣的明显复苏，这些结构表现出新的和令人兴奋的物理特性。这个特别的提议是关于纳米结构介质的光学性质，在二维粒子阵列的形式，可能或可能不，位于一个更复杂的多层薄膜结构。研究小组将通过自组装工艺制造贵金属纳米棒的二维阵列，该工艺包括工业上兼容的薄膜处理技术，结合电化学、阳极氧化和沉积，以及在纳米尺度上创造结构物质的方法。该过程将使用各种光学技术进行监测，包括动态、实时椭偏和宽光谱范围内的光度测定。这些将通过全面的加工后处理和额外的光学测量来补充，试图收集一套全面的各向异性行为观察结果。为了理解光学数据，研究小组将建立有效介质理论来解释观察到的行为。这将通过调用离散偶极子方法（DDA）来处理单个纳米粒子的响应以及它们在微观尺度上相互作用来完成。DDA方法将每个粒子视为等效巨型原子的集合，这些原子模拟了奇形介质的特性，受到可用计算能力的限制。目标将是发展制作技术，以产生新的媒体；并通过扩展或开发新的“基于原子的”数学模型，从理论上观察和理解它们的集体各向异性、光学行为。

项目成果

Guided plasmonic modes in nanorod assemblies: strong electromagnetic coupling regime.

• DOI: 10.1364/oe.16.007460
• 发表时间: 2008-05
• 期刊: Optics express
• 影响因子: 3.8
• 作者: G. Wurtz;W. Dickson;Daniel T. O'Connor;R. Atkinson;W. Hendren;P. Evans;Robert Pollard;Anatoly V. Zayats

Optical transmission properties and electric field distribution of interacting 2D silver nanorod Arrays

• DOI: 10.1002/adfm.200701289
• 发表时间: 2008-04-11
• 期刊: ADVANCED FUNCTIONAL MATERIALS
• 影响因子: 19
• 作者: Evans, Paul R.;Kullock, Rene;Eng, Lukas M.
• 通讯作者: Eng, Lukas M.