物理学报2012，Vol.61Issue(4)：458-463,6.
具有分离门的电抽运多层石墨烯负动态电导率的理论研究
Theory research of negative dynamic conductivity in electrically pumped multiple graphene layer structures with split gates
摘要
Abstract
The negative dynamic conductivity of graphene in THz range makes it to be a promise medium in THz radiation and amplification. This paper proposes electrically pumped multiple graphene layer structures with split gates,sets up the theory model of electrically induced n-i-p junction,calculates the ac conductivity associated with the interband and intraband transitions under the conditions of population inversion,discusses the bias voltage,gate voltage,number of graphene layers and the momentum relaxation time dependences of ac conductivity.It is shown that the real part of dynamic conductivity within terahertz range can be negative in certain conditions,namely,interband radiation is greater than the intraband absorption,which demonstrates the feasibility of taking electrically pumped multiple graphene layer structures with split gates as an active medium in radiating terahertz coherent source.关键词
多层石墨烯/n-i-p结/负电导率/太赫兹辐射Key words
multiple graphene layer/n-i-p junction/negative conductivity/terahertz radiation分类
化学化工引用本文复制引用
张玉萍,张洪艳,尹贻恒,刘陵玉,张晓,高营,张会云..具有分离门的电抽运多层石墨烯负动态电导率的理论研究[J].物理学报,2012,61(4):458-463,6.基金项目
国家自然科学基金 （）
山东省自然科学基金 （）
山东科技大学杰出青年科学基金 （）
山东科技大学科技创新基金（批准号：YCB110084）资助的课题 （）
山东省高等学校科技计划项 （）
青岛市科技计划（批准号：11-2-4-4-（8）-jch.10-3-4-2-I-jcj） （）
