Mechanically strained silicon nanowire optoelectronic devices

机械应变硅纳米线光电器件

• 批准号: 1001174
• 负责人: Manjeri Anantram
• 金额: $ 42万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1001174&HistoricalAwards=false
• 关键词: Mechanically; strained; silicon; nanowire; optoelectronic

Objective: We propose novel silicon nanowire device concepts that show the potential to efficiently emit light of various wavelengths. The underlying device physics that makes efficient photon emission theoretically possible is the direct bandgap of the nanowires and the short radiative recombination life-times. The tuning of emitted wavelength by applying reversible mechanical strain on nanowires is investigated. The proposed research involves a close interplay between fabrication, modeling and theory to realize tunable light emission from silicon nanowires by using the silicon-on-insulator platform.Intellectual merit: The intellectual merit of the proposed research lies in gaining fundamental knowledge of the role of strain in tuning the optoelectronic response of silicon nanowires. While challenging, the realization of the proposed devices will offer an unique dimension allowing for the incorporation of strain in nanowires to yield the much desired optoelectronic response on silicon platform. The proposed pathways to engineer the optoelectronic response is also of basic importance to silicon based photovoltaics.Broad impact: The proposed research has potential to permeate the fields of communication, medicine, defense and energy. End applications include lidars, imaging of tissue, light sources and photovoltaics. The training of graduate and undergraduate students in using silicon technology for applications that are fertile growth areas in the semiconductor industry is an integral part of this work. The topics of electromechanical properties of nanowires and the use of the silicon-on-insulator platform to create nanodevices will be introduced in undergraduate and graduate level nanotechnology courses. Our outreach activities will focus on low income K-12 students and the training of women and minority undergraduate students.

目的：我们提出了新型的硅纳米线设备概念，该概念显示出有效发出各种波长的潜力。理论上使高效光子发射的基础设备物理学是纳米线的直接带隙和短辐射重组的生命时光。研究了通过在纳米线上施加可逆的机械应变来调整发射波长。拟议的研究涉及通过使用硅纳米线从制造，建模和理论之间的紧密相互作用，以实现可调的光发射。智能优点：拟议研究的智力优点在于，拟议研究的智力优点在于获得对对基本知识的基本知识。调整硅纳米线的光电子响应的压力。在具有挑战性的同时，所提出的设备的实现将提供一个独特的维度，允许在纳米线中纳入应变，从而在硅平台上产生所需的光电响应。拟议的设计途径对基于硅的光伏影响，光电子反应也至关重要。法路影响：拟议的研究有可能渗透到通信，医学，国防和能源的领域。最终应用包括激光雷达，组织成像，光源和光伏。培训研究生和本科生在半导体行业中使用硅技术的应用是肥沃的生长领域的应用是这项工作不可或缺的一部分。纳米线的机电特性的主题以及在本科和研究生水平的纳米技术课程中将引入纳米仪平台来创建纳米电视的主题。我们的外展活动将集中于低收入K-12学生以及对妇女和少数族裔本科生的培训。