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.

本研究的目的是利用一种结构紧凑、价格低廉的非相干光源来构建亚太赫兹光谱系统，并展示其实用性。首先，我们构建了一个由连续波多模激光二极管(CWMLD)和低温生长的GaAs光电导开关作为亚太赫兹发射体、Martin-Puplett型干涉仪和测辐射热计组成的系统。通过对掺杂硅片透过率的测量，验证了该系统的有效性。接下来，我们构建了由CWMLD和两个光导开关组成的新的光谱系统，用于发射器和探测器。通过测量掺杂硅片的复折射率，证明了这种廉价紧凑的系统与昂贵的超短激光系统是等价的。

项目成果

T.Kiwa: "THz emission properties of amorphous GaAs photoswitches fabricated on YBa_2Cu_3O_<7-δ> thin films"IEEE 7th Int. Conf. on Terahertz Electronics Proc.. 165-168 (1999)

T.Kiwa：“在 YBa_2Cu_3O_<7-δ> 薄膜上制造的非晶 GaAs 光电开关的太赫兹发射特性”IEEE 7th Int. Conf. on Terahertz Electronics Proc.. 165-168 (1999)

O.Morikawa: "Sub-THz spectroscopic system using a multimode laser diode and photoconductive antenna"Appl.Phys.Lett.. 75. 3772-3774 (1999)

O.Morikawa：“使用多模激光二极管和光电导天线的亚太赫兹光谱系统”Appl.Phys.Lett.. 75. 3772-3774 (1999)

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。

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。

O. Morikawa et al.: "Sub-THz spectroscopic system using a multimode laser diode and photoconductive antenna"Appl. Phys. Lett.. 75. 3772-3774 (1999)

O. Morikawa 等人：“使用多模激光二极管和光电导天线的亚太赫兹光谱系统”Appl。