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.

1.8-4THz波段的离子、原子和分子外差遥感光谱技术在研究地球和行星大气的物理和化学条件方面发挥着重要作用。我们研制了一种用于OH、OI等遥感的THz波段超导热电子测辐射热计混频接收器（HEBM），该接收器采用螺旋溅射技术在20 nm厚的AlN界面层上沉积6 nm厚的NbTiN超导微桥。该装置采用新研制的无振动闭式循环机械式4K脉冲管制冷机，在4.2K下运行。在1.5THz波段，特别是改变乘法器链固态源的本振功率，研究了HEBM的性能。在0.8-1.8GHz频段，中频信号的输出功率随HEBM的偏置电流的变化有一个最大峰值。最佳接收机噪声温度在中频最大值附近得到了广泛的应用。还发现IF信号在IF最大值位置附近最稳定（超过10秒）。考虑到RF/LO耦合效率和Si透镜的反射，尽管微桥尺寸没有完全优化，但我们的HEBM的部分校正的接收机噪声温度优于1600 K。

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