An ultra‐wideband linear‐to‐circular polarization converter in reflection mode at terahertz frequencies

Li Sijie; Zhang Xiangjun

摘要

Abstract > A new approach to designing wideband wide‐angle ultrathin linear‐to‐circular (LTC) polarization converter is presented. The metasurface is composed of a symmetric hexagonal structure formed by parallel metal slits printed on a grounded dielectric substrate, which has a pair of independent mutually perpendicular u and v axes, along ±45° directions with respect to the y ‐axis direction. Numerical simulation results show that the LTC metasurface can convert a linear polarization incidence wave into a circular polarization reflected wave. The bandwidth of axis ratio less than 3 dB is 2.24?THz, which is from 2.37?THz to 4.61 THz, and the fractional bandwidth is 64% under normal incidence. Meanwhile, the unit cell of the LTC metasurface is low profile (0.35 λ <sub>0</sub> ?×?0.35 λ <sub>0</sub> ?×?0.118 λ <sub>0</sub> ) and compact. The polarization conversion efficiency can be maintained at over 85% at an angle of incidence up to 40°. Therefore, the proposed converter is useful for the development of the integrated THz polarization manipulation devices. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><abstract type =“main”xml：lang =“en”> <标题类型=“main”>抽象</ title> > 提出了一种设计宽带广角超薄线性到圆形（LTC）极化转换器的新方法。元曲面由由平行金属狭缝形成的对称六边形结构组成，该平行金属狭缝形成在接地的介电基板上，其具有一对独立的彼此垂直 U </ i> 和 v </ i> 轴，沿±45°方向相对于 y </ i> - 轴方向。数值模拟结果表明，LTC元面可以将线性偏振入射波转换成圆极化反射波。轴比小于3 dB的带宽为2.24〜THz，其为2.37〜4.61至46六个，并且在正常发病率下分数带宽为64％。同时，LTC Metasurface的单位单元是低调（0.35 λ</ i> <sub> 0 </ sub> ？×0.35 λ</ i> <sub> 0 </ sub> ？×0.118 λ</ i> <sub> 0 </ sub> ）和紧凑。极化转换效率可以以高达40°的入射角保持超过85％。因此，所提出的转换器可用于开发集成的THz偏振化设备。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" > 著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-24977/'>《Microwave and optical technology letters 》</a> <b style="margin: 0 2px;">|</b><span>2019年第12期</span><b style="margin: 0 2px;">|</b> <span>共6页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Sijie&option=202" target="_blank" rel="nofollow">Li Sijie;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhang Xiangjun&option=202" target="_blank" rel="nofollow">Zhang Xiangjun;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>School of Information and Control EngineeringChina University of Mining and TechnologyXuzhou China;</p> <p>School of Information and Control EngineeringChina University of Mining and TechnologyXuzhou China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li> <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span> <a href="https://www.zhangqiaokeyan.com/clc/1165.html" title="光学">光学 ;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=broadband metamaterial&option=203" rel="nofollow">broadband metamaterial;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=linear‐to‐circular converter&option=203" rel="nofollow">linear‐to‐circular converter;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=polarization converter&option=203" rel="nofollow">polarization converter;</a> </p> <div class="translation"> 机译：宽带超材料;线性到圆形转换器;极化转换器; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704019948633.html">An ultra‐wideband linear‐to‐circular polarization converter in reflection mode at terahertz frequencies</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Sijie&option=202" 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