Hyper-resolution Brillouin-rayleigh Spectroscopy by Optical Beating Technique

采用光学跳动技术的超分辨率布里渊-瑞利光谱

• 批准号: 05452117
• 负责人: TAKAGI Kenshiro
• 金额: $ 4.67万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452117/
• 关键词: Brillouin scattering; Optical beating technique; Phonon spectroscopy; Phonon relaxation; Orientational Relaxation; Thermal phonon resonance; Rayleigh scattering; 光ビート分光; フォノンスペクトロスコピー; 偏光解消散乱

The light scattering system with a scanning Fabry-Perot interferometer and a high-sensitivity photo-multiplier has long been the general standard of all the Brillouin scattering experiments ever since Fleury and Chiao first succeeded in the observation of a Brillouin triplet in the middle of the 1960's. Every endeavor has been made to improve the resolution of the experiment, which has not generally been considered satisfactory. A very sophisticated system in which a computer controls multipass Fabry-Perot etalon or etalons in tandem, for example, has been developed. To reduce the additional line broadening introduced by the spectrum width of the light source, a single longitudinal mode laser with a frequency-stabilizing device has been utilized, the resultant lack of output power being compensated by the increased detection sensitivity of a cooled photo-multiplier tube followed by a photon counter. The Brillouin scattering system of today is thus becoming more and more complicated tho … More ugh its essential part still stays within the experiment of Fleury and Chiao. Nevertheless, all these efforts to achieve higher resolution seems to have been rewarded with rather limited success.On the other hand, the idea of a Brillouin scattering experiment base on a completely different principle has been proposed, i.e., the technique of light beating spectroscopy in which the Fabry-Perot etalon is replaced with a spectrum analyzer. Various experiments have been tried along this line, but most of them were unsuccessful with only one exception. Recently we succeeded in the development of a new system of hyper-resolution Brillouin scattering in which the frequency resolution was increased by 10^3-10^4 times. In this study, we further improved the light scattering system with which we conducted some sophisticated experiments, including (1) observation of phonon relaxation phenomenon in polymer solids, (2) discovery of thermal phonon resonance and (3) investigation of asymmetry in Brillouin triplet observed under non-equilibrium state. Less

自Fleury和Chiao首先在1960年代中期的Brillouin Triplet中成功地观察到了，计算机控制多通perrot Etalon或Etalons tandem以来，具有腐烂的散射系统Llouin散射实验。例如，已经开发了通过光源设备来减少额外的线路，因此缺乏因素的敏感性而缺乏输出的敏感性。在Fleury和Chiao的经验中，YS的复杂性。 Fabry-Perot Etalon用各种实验替换。我们在聚合物固体中进行了复杂性的实验，（2）在非平衡状态下观察到的Brillouin Triplet中的不对称性

项目成果

K.Hattori,K.Sakai,K.Takagi: "Light beating spectroscopy of Brillouin scattering in solid polymer" Jpn.J.Appl.Phys.33. 3217-3220 (1994)

K.Hattori、K.Sakai、K.Takagi：“固体聚合物中布里渊散射的光拍光谱”Jpn.J.Appl.Phys.33。

K.Hattori, K.Sakai and K.Takagi: "Light beating spectroscopy of Brillouin scattering in solid polymer" Jpn.J.Appl.Phys.33. 3217-3220 (1994)

K.Hattori、K.Sakai 和 K.Takagi：“固体聚合物中布里渊散射的光拍光谱”Jpn.J.Appl.Phys.33。

K.Hattori,K.Sakai,K.Takgi: "Light beating spectroscopy of Brillouin scattering in solid polymer" Jpn.J.Appl.phys.33. 3217-3220 (1994)

K.Hattori、K.Sakai、K.Takgi：“固体聚合物中布里渊散射的光拍光谱”Jpn.J.Appl.phys.33。

K.Sakai,K.Hattori,K.Takagi: "Brillouin scattering experiment under strong stray light" Jpn.J.Appl.Phys.(in press).

K.Sakai、K.Hattori、K.Takagi：“强杂散光下的布里渊散射实验”Jpn.J.Appl.Phys.（出版中）。

K.Sakai, K.Hattori and K.Takagi: "Thermal-phonon resonance" Phys.Rev.B. (submitted).

K.Sakai、K.Hattori 和 K.Takagi：“热声子共振”Phys.Rev.B。