Development of THz Band Heterodyne Receiver for Semote-Sensing Spectroscopy of OH Radical and Atomic Oxygen in Middle Atmosphere

中层大气中OH自由基和原子氧遥感光谱太赫兹波段外差接收器的研制

• 批准号: 19310009
• 负责人: MAEZAWA Hiroyuki
• 金额: $ 13.06万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19310009/
• 关键词: 地球観測; リモートセンシング; テラヘルツ; 赤外材料・素子; 量子エレクトロニクス; 環境変動; 先端機能デバイス; 地球変動予測; 超伝導材料・素子

Heterodyne remote-sensing spectroscopy of ions, atoms, and molecules at 1.8-4THz frequency band plays an important role in the study of physical and chemical conditions of the terrestrial and planetary atmospheres. We have developed a THz band superconducting Hot-Electron Bolometer mixer receiver (HEBM) for the remote-sensing of OH, OI, and so on. Our HEBM employed a 6nm thick superconducting Niobium Titanium Nitride (NbTiN) micro-bridge deposited on a 20nm-thick AlN interface layer using a helicon sputtering technique. This HEBM was operated at 4.2K by using the cryostat newly developed with a vibration-free closed-cycle mechanical 4K pulse tube refrigerator. The performance of the HEBM was investigated at the 1.5THz band especially changing the local oscillator power of a multiplier chain solid-state source. The output power of the intermediate frequency (IF) signal at 0.8-1.8GHz band had a maximum peak as a function of the bias current for HEBM. The best receiver noise temperature was obtained widely at around the IF maximum position. It was also found that the IF signal was most stable (more than 10 second) at around the IF maximum position. Considering the RF/LO coupling efficiency and reflection at Si lens the partially corrected receiver noise temperature of our HEBM was better than 1600K although the micro-bridge dimension was not completely optimized.

1.8-4太赫兹频段离子、原子和分子的外差遥感光谱在研究地球和行星大气的物理化学条件方面发挥着重要作用。我们研制了一台太赫兹波段超导热电子测辐射热计混频接收器(HEBM)，用于对OH、OI等的遥感。我们的HEBM采用6 nm厚的超导NbTiN(NbTiN)微桥，采用螺旋溅射技术在20 nm厚的AlN界面层上沉积。利用新研制的无振动闭合循环机械式4K脉冲管制冷机的低温恒温器，在4.2K下工作。研究了HEBM在1.5THz频段的性能，特别是改变倍增器链固态源的本振功率。在0.8-1.8 GHz频段，中频(IF)信号的输出功率随HEBM偏置电流的变化有一个最大峰值。在中频最大值附近，接收器的最佳噪声温度普遍存在。还发现IF信号在IF最大位置附近最稳定(超过10秒)。考虑到RF/LO耦合效率和在硅透镜上的反射，我们的HEBM部分校正后的接收器噪声温度优于1600K，但微桥尺寸并没有完全优化。

项目成果

emperature and Density Distribution in the Molecular Gas Toward Westerlund 2: Further Evidence for Physical Association

Westerlund 2 分子气体的温度和密度分布：物理关联的进一步证据

• 发表时间: 2010
• 期刊: The Astrophysical Journal Vol.709,Issue2
• 作者: Ohama;A. ; Dawson;J.R. ; Furukawa;N. ; Kawamura;A. ; Moribe;N. ; Yamamoto;H. ; Okuda;T. ; Mizuno;N. ; Onishi;T. ; Maezawa;H. ; Minamidani;T. ; Mizuno;A. ; Fukui;Y.
• 通讯作者: Y.

量子カスケードレーザー (QCL) を用いたテラヘルツ波ヘテロダイン受信機の開発

使用量子级联激光器（QCL）开发太赫兹波外差接收器

• 发表时间: 2009
• 作者: 小山知記;前澤裕之;水野亮;長濱智生;荻野竜樹;山倉鉄也;芝祥一;関根徳彦;寶迫巌;山本智;入交芳久
• 通讯作者: 入交芳久

NbHEBミクサ性能の動作温度依存性

NbHEB 混合器性能与工作温度的关系

• 发表时间: 2009
• 作者: 芝祥一;新保謙;蒋玲;前澤裕之;山本智
• 通讯作者: 山本智

Millimeter/Submillimeter-Wave Band Observations of Planetary Atmospheres with Ground-Based Telescopes

用地基望远镜对行星大气进行毫米/亚毫米波段观测

• 发表时间: 2009
• 作者: H.Maezawa;N.Moribe;A.Mizuno;T.Nagahama;M.Tokumaru;T.Umeda;A.Ohama;T.Onishi;H.Yamamoto;Y.Fukui;NANTEN2 Consortium
• 通讯作者: NANTEN2 Consortium

Ground-based millimeter-wave measurements of stratospheric H2180 in a subtropical region in the southern hemisphere

南半球副热带地区平流层 H2180 的地面毫米波测量

• 发表时间: 2007
• 作者: Nagahama;A. Mizuno;H. Maezawa;T. Toriyama;T. Sugimoto;M. Matsuura
• 通讯作者: M. Matsuura