A simple Fourier transform spectrometer for terahertz applications

来源 :Chinese Science Bulletin | 被引量 : 0次 | 上传用户:xiehao2008
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 simple Fourier transform spectrometer was designed and constructed for the measurement of detectors,sources,passive devices and materials in the terahertz(THz) range.It can be operated at frequencies between 0.3 and 1.5 THz,using a 50-μm-thick Mylar-film beam splitter.The spectral range can be changed by altering the thickness of the beam splitter.The highest frequency resolution is 750 MHz.We studied the properties of heterodyne detectors including superconductor mixers and semiconductor harmonic mixers,direct detectors including an InSb semiconductor bolometer,superconducting tunnel junctions and the Golay cell,and sources including Gunn oscillators and a microwave source with its multipliers,as well as various materials and passive devices including Si wafers and metal mesh filters. A simple Fourier transform spectrometer was designed and constructed for the measurement of detectors, sources, passive devices and materials in the terahertz (THz) range. It can be operated at frequencies between 0.3 and 1.5 THz, using a 50-μm-thick Mylar- film beam splitter. The spectral range can be changed by altering the thickness of the beam splitter. The highest frequency resolution is 750 MHz. We studied the properties of heterodyne detectors including superconductor mixers and semiconductor harmonic mixers, direct detectors including an InSb semiconductor bolometer, superconducting tunnel junctions and the Golay cell, and sources including Gunn oscillators and a microwave source with its multipliers, as well as various materials and passive devices including Si wafers and metal mesh filters.
其他文献
新课程改革的理念已逐步深入到课堂,课堂教学的探索活动正如火如荼地在全国展开。正是这场规模宏大、声势浩荡的改革,使我国的基础教育受到前所未有的洗礼。中学语文教学更是首当其冲,广大教师以饱满的激情投入其中,课堂教学发生了质的变化,特别是对话教学受到前所未有重视,没有“对话”便不是语文课,这是笔者参加了为数甚多的观摩课、示范课后的最大感受。说明广大一线教师的教学理念有了质的变化、质的飞跃。但欣喜之余又隐
在郑学益的办公桌上,除了教科书、学术专著外,还有一本本策划中国著名企业的原始档案。而郑学益的策划史,应该从他关注海尔开始。张瑞敏登上了哈佛讲坛那是1996年,全国家电正
卡特彼勒公司的最初岁月1925年4月,美国贝斯特拖拉机公司(C.L.Best Tractor Company)和霍尔特制造公司(Holt Manufacturing Company)合并,他们组成的公司叫卡特彼勒拖拉机公
针对“机械原理”课程教学如何培养大学生创新能力的问题,结合课程特点,提出了教学中强化问题意识有利于学生创新能力的培养,探索了问题教学的课堂教学模式,设计出解释性、阐
一、基本步骤
This paper focused on the folding damage behavior of the space rigidizable materials in terms of 3-layer composite membranes. An experimental scheme was present
The interaction between precipitation and recrystallization and its effect on t he properties of the Cu-Ni-Si-Cr alloy during aging were discussed.The result s
投资新兴跨国企业是富有远见的选择,但须作好踏上艰辛旅程的准备。未来十年,全球企业排行榜上最大的变化将是发展中国家企业的崛起。诸如中国的华为公司、印度的信息系统技术
我们今天看到很多运作成功的组织的时候,总是试图去解释他们为什么可以那么成功。我们得到了一些解释——非常好的治理结构、更清晰的战略、层层负责的组织、持续得到激励和
是否发动价格战——关键看增量保润分析如今,动不动就出现的价格战让很多商家颇为头疼。价格战频频出现,显然是因为它可能给企业带来好处。长虹在1996年通过发动中国市场上