检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:程林 张磊[1] CHENG Lin;ZHANG Lei(Shaanxi Key Laboratory of Information Photonic Technique, Key Laboratory of Physical Electronics and Devices of Ministry of Education, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China)
机构地区:[1]西安交通大学电子学院,电子物理与器件教育部重点实验室,陕西省信息光子技术重点实验室,西安710049
出 处:《人工晶体学报》2021年第7期1356-1361,共6页Journal of Synthetic Crystals
基 金:山西省重点研发计划(201903D121129);陕西省自然科学基础研究计划(2018JM6001)。
摘 要:目前研究人员提出了各种光学天线以线性方式控制辐射图,而较大的非线性效应可以引起天线的折射率的变化,从而改变辐射方向图。通过修正电子的有效质量进而完善Drude模型,可得到氧化铟锡(ITO)的非线性折射率与频率和强度的函数关系,进而可知由ITO制成的纳米天线会表现出极大的光学Kerr效应。本文研究了ITO天线的线性和非线性响应。利用ITO的Kerr效应控制天线的辐射方向图。基于该模型,设计了一种非线性光学天线,实现了覆盖近红外波段(1000~1650 nm)的可调谐辐射方向图。进一步,基于ITO和介电材料硅(Si)设计了一种杂化的非线性光学天线。该杂化天线可以更好地利用ITO的强Kerr效应,可以较大程度上对光场辐射进行调控。该工作突破了新型非线性材料的强Kerr效应仅局限于特定共振频率点或者零折射率点这一特点。本研究提供一种用于超快动态控制超材料的新颖方法,可应用于光束转向和光学调制等。Various optical antennas have been proposed to control the radiation pattern in a linear manner.Furthermore,the larger nonlinearity will play a vital role,and will change the refractive index of the antenna,thereby changing the radiation pattern.By modifying the effective mass of electrons in Drude model,it can be obtained that the refractive index of ITO film changes with the optical field intensity,and provides the nonlinear refractive index as a function of frequency and intensity.Nanoantennas made of indium tin oxide(ITO)will exhibit strong Kerr effect.The linear and nonlinear responses of ITO antennas was studied,the Kerr effect of ITO was used to control the radiation pattern of the antenna.Based on this model,a nonlinear optical antenna was designed to achieve tunable radiation pattern covering a broad near infrared band(1000 nm to 1650 nm).Moreover,a hybrid nonlinear antenna was demonstrated,composed of ITO and silicon(Si),which can control the radiation pattern more efficiency.This work breaks through the limitation that the strong nonlinear refractive index coefficient of nonlinear material only occurs at specific resonance frequency or the zero refractive index point.Our study provides a novel approach toward ultrafast dynamical control of metamaterials,for applications such as beam steering and optical modulation.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:3.138.112.77