High efficiency terahertz diffraction grating with trapezoidal elements

来源 :Chinese Physics B | 被引量 : 0次 | 上传用户:mqkxxmvo
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A newly designed grating used in terahertz region is proposed, which is composed of the trapezoidal elements repeated successively along one dimension of the substrate, and uniform interval(the grating period) repeated along the other dimension. The transmission of the grating owns a designable trapezoidal profile dependent on the geometric dimensions of the element. The far-field diffraction patterns of a designed grating at incident broadband terahertz frequencies, with element dimensions of upper, lower side and period of 50, 250, and 300 μm, respectively, are simulated by the scalar diffraction theory. The simulation results indicate that the terahertz grating exhibits a property of single-order diffraction,and the diffraction efficiency of the first order reaches 6.6%, exceeding that of a traditional sinusoidal amplitude grating with identical period and duty cycle. Owing to the regular architecture and the high single-order diffraction efficiency, the grating is easy to fabricate and shows great potential applications in single-shot spectral measurements of weak broadband terahertz pulse. A newly designed grating used in terahertz region is proposed, which is composed of the trapezoidal elements repeated successive along one dimension of the substrate, and uniform interval (the grating period) repeated along the other dimension. The transmission of the grating owns a designable trapezoidal profile dependent on the geometric dimensions of the element. The far-field diffraction patterns of a designed grating at incident broadband terahertz frequencies, with element dimensions of upper, lower side and period of 50, 250, and 300 μm, respectively, are simulated by the scalar diffraction theory. The simulation results indicate that property of single-order diffraction, and the diffraction efficiency of the first order reaches 6.6%, exceeding that of a traditional sinusoidal amplitude grating with identical period and duty cycle. Owing to the regular architecture and the high single-order diffraction efficiency, the grating is easy to fabricat e and shows great potential applications in single-shot spectral measurements of weak broadband terahertz pulse.
其他文献
本文结合湖南省江永县的地理、历史、人口变迁,结合瑶族的传统民俗和文字产 生的一般规律等对“女书”的族属问题作了各方面的分析,得出“女书”是一种瑶族文字的结论。 Based
云南省老君山旅游风景区位于滇西北的丽江地区,这里山川秀丽,风光旖旎,动植物资源极其丰富,一天可以看到三次日出日落。这里有70多种高山杜鹃,素有“杜鹃王国”之称,其中黄杜鹃最为
全国假日办对刚刚过去的“五一”黄金周中主要景点门票收入与接待人数进行了初步的统计,分别约为5亿元人民币和1400万人次。全国假日办宣布说,实现了两者的大幅增长。但细究
经济政策中央经济工作会议提出明年必须抓好的六大方面工作…………………………(6—4)特 稿致全国统计科研工作会议的贺信…………………………朱之鑫(2-1)面向新世纪开创新局面 ——
在学校领导和教职工的大力支持下 ,1 999年《韶关大学学报》自然科学版有 7篇论文被中国科学院《中国数学文摘》及《中国数学文献数据库》收录 ,这是《韶关大学学报》自然科
六、和合意义生死世界和合生存生死世界差分为境的生死学和理的生死学 ;境和理的生死学融突和合为生存生死世界。人既生存在这世界上 ,就要生得有意义 ,死得有价值 ,这便进入
中国老区旅游扶贫论坛暨老区百县旅游资源推介会于7月31日至8月2日在北京国际会议中心举行。中共中央政治局委员、全国人大常委会副委员长姜春云为会议发来了贺信。全国政协
2017年6月5日讯:“香港”得名于一度盛产土沉香。香港市区重建局计划在新项目中以土沉香绿化市区,保育之馀也让市民多欣赏沉香树。长春社贊成迁地保育,并提醒市建局做好保安,
本文是对汪子嵩、王太庆先生《关于“存在”和“是”》一文的回应。作者首先对希腊语词eimi作了几点补充 ,进而介绍巴纳斯对巴门尼德estin的逻辑主语的研究 ,最后表明作者在
·哲学、伦理学、逻辑学、宗教学研究·论道德目的论与道德工具论………王泽应(1-29)从伦理生活到生活伦理──展望21世纪的公民伦理教育………窦炎国(1-34)孔子“德刑”之辨探微………张开