Construction of sub-terahertz spectroscopic system using incoherent light source

利用非相干光源构建亚太赫兹光谱系统

• 批准号: 11450031
• 负责人: HANGYO Masanori
• 金额: $ 9.54万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450031/
• 关键词: sub-terahertz wave; incoherent light source; photoconductive switch; laser diode; time domain spectroscopy; cross-correlation; semiconductor characterization; complex refractive index; テラヘルツ電磁波; サブテラヘルツ波; 相互相関; テラヘルツ時間領域分光; マルチモードレーザーダイオード; ス

The purpose of this study is to construct sub-terahertz spectroscopic system using a compact and cheap incoherent light source and to demonstrate its usefulness. First, we constructed a system composed of a continuous wave multimode laser diode (CWMLD) and a low-temperature-grown GaAs (LT-GaAs) photoconductive switch, which work as an sub-THz emitter, and a Martin-Puplett type interferometer and bolometer. The usefulness of the system was verified by measuring transmittance of doped silicon wafers. Next, we constructed new spectroscopic system consisting of a CWMLD and two photoconductive switches, which are used for an emitter and a detector. By measuring the complex refractive index of doped silicon wafers, it is proved that this cheep and compact system is equivalent with a system using an expensive ultrashort laser.

本研究的目的是使用紧凑且廉价的非相干光源构建亚太赫兹光谱系统并证明其实用性。首先，我们构建了一个由连续波多模激光二极管（CWMLD）和低温生长砷化镓（LT-GaAs）光电导开关组成的系统，用作亚太赫兹发射器，以及马丁-普莱特型干涉仪和辐射热测量计。通过测量掺杂硅片的透射率验证了该系统的实用性。接下来，我们构建了由 CWMLD 和两个光电导开关组成的新光谱系统，用于发射器和检测器。通过测量掺杂硅片的复折射率，证明这种廉价而紧凑的系统与使用昂贵的超短激光器的系统等效。

项目成果

N.Kida 他: "Low-energy charge dynamics in La_<0.7>Ca_<0.3>MnO_3 : THz time-domain spectroscopic studies"Phys.Rev.B. 62-18. R11965-R11968 (2000)

N. Kida 等人：“La_<0.7>Ca_<0.3>MnO_3 中的低能电荷动力学：太赫兹时域光谱研究”Phys.Rev.B. (2000)。

萩行正憲: "レーザー・テラヘルツ波工学とその応用"高温学会誌. 27. 131-143 (2001)

Masanori Hagi：“激光太赫兹波工程及其应用”高温科学学会杂志 27. 131-143 (2001)。

O. Morikawa: "A spectroscopic system in sub-terahertz region using an incoherent light source and its cross-correlation signal"EEE 7th Int. Conf. on Terahertz Electronics Porch.. 304-307 (1999)

O. Morikawa：“使用非相干光源及其互相关信号的亚太赫兹区域光谱系统”EEE 7th Int。

M. Hangyo: "Laser terahertz wave technology and its applications"J. of High Temp. Soc.. 27. 131-143 (2001)

M. Hangyo：“激光太赫兹波技术及其应用”J。

T. Kiwa et al.: "Optical response in amorphous GaAs thin films prepared by pulsed laser deposition"Jpn. J. Appl. Phys.. 39. 6304-6308 (2000)

T. Kiwa 等人：“脉冲激光沉积制备的非晶 GaAs 薄膜中的光学响应”Jpn。