Hybrid Plasmonic Structures: From Photonic Devices to Bio-sensors

混合等离子体结构：从光子器件到生物传感器

• 批准号: 249531-2012
• 负责人: Mojahedi, Mohammad
• 金额: $ 1.53万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=570638
• 关键词: Hybrid; Plasmonic; Structures; Photonic; Devices

In recent years the use of metallic structures at optical and infrared frequencies has enjoyed a strong resurgence. This is in large part due to the use of surface plasmon polaritons (SPPs), enabled with our continually improving ability to deposit and shape matter, particularly metals, at the nano-scale. SPPs are surface waves confined to the interface between a metal and a dielectric. These surface waves provide researchers with intriguing properties: they can be confined to exceedingly small dimensions, exhibit sharp intensities, and display strong resonances. These properties have motivated researchers to consider the use of SPPs for various applications ranging from compact photonic components and biosensors to photothermal and photovoltaic devices. However, to transform the SPPs to a versatile technology, certain challenges must be met. Chief among these challenges are: 1) the need to optimize the relation between two opposing factors: losses (propagation distance) and confinement (mode size); 2) the need for a variety of functional plasmonic devices that are silicon compatible; the 3) the need for plasmonic devices to support transverse electric (TE) mode in addition to the transverse magnetic (TM) mode, particularly for biosensing applications. The long term objective of our proposed program is to provide some answers to these challenges. To this end, recently our group was the first to propose the use of a passive hybrid plasmonic (HP) structure as an optimized solution to the problem of SPP loss versus confinement. Moreover, the HP structure is silicon compatible and supports both the TM and TE modes. We will achieve our long range objective by establishing a program which specifically advances our knowledge of the passive HP structure and various modes that it supports, and by designing, fabricating, testing, and characterizing a variety of passive, compact, and functional photonic and bio-plasmonic devices based on the HP architecture. Successful completion of the program proposed here is expected to have a great impact on the design of the next generation of optical and bio-medical devices.

近年来，在光学和红外频率上使用金属结构的情况出现了强劲复苏。这在很大程度上是由于表面等离子体激元(SPP)的使用，使我们能够不断提高在纳米级沉积和塑造物质，特别是金属的能力。表面波是限制在金属和介质之间的界面上的表面波。这些表面波为研究人员提供了耐人寻味的特性：它们可以被限制在极小的维度内，表现出尖锐的强度，并显示出强烈的共振。这些特性促使研究人员考虑将SPP用于各种应用，从紧凑型光子组件和生物传感器到光热和光伏设备。然而，要将SPP转变为多功能技术，必须应对某些挑战。其中最主要的挑战是：1)需要优化两个对立因素之间的关系：损耗(传播距离)和限制(模式大小)；2)需要各种与硅兼容的功能性等离子体设备；3)除了横磁(TM)模式之外，还需要等离子体设备支持横电(TE)模式，尤其是在生物传感应用中。我们提议的计划的长期目标是为这些挑战提供一些答案。为此，最近我们小组首次提出使用无源杂化等离子体(HP)结构作为SPP损失与限制问题的优化解决方案。此外，HP结构与硅兼容，同时支持TM和TE模式。我们将通过建立一个专门提高我们对无源HP结构及其支持的各种模式的知识的计划，以及通过设计、制造、测试和表征基于HP架构的各种无源、紧凑和功能的光子和生物等离子体器件来实现我们的长期目标。本文提出的计划的成功完成有望对下一代光学和生物医疗设备的设计产生重大影响。