Rapid acquisition of Brillouin spectra by non-scanning Fabry-Perot interferometer

通过非扫描法布里-珀罗干涉仪快速采集布里渊光谱

• 批准号: 11555019
• 负责人: KOJIMA Seiji
• 金额: $ 6.78万
• 依托单位: University of Tsukuba
• 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-11555019/
• 关键词: Brillouin scattering; interference spectrometer; solid etalon; finesse; relaxation; activation energy; glass; acoustic phonon; エタロン; CCD; スペクトル; エタノール; プロパノール; 干渉計

We have constructed the non-scanning Fabry-Perot interferometer by the combi nation of a high-stable solid etalon and a high-sensitive CCD detector. In order to high-resolution Brillouin spectra, we introduced a frequency stabilized green YAG laser as an exciting source. The performance of the setup has been checked carefully in comparison with the commercially available scanning Fabry-Perot interferometer. The very high finesse of 120 is obtained by the careful design and adjustment of optics. Using this setup, we studied the relaxation of glass-forming ethanol, and it is found that the relaxation process coupled to acoustic wave corresponds to a slow β-process observed previously by dielectric spectroscopy. In addition we also studied the optics for micro-Brillouin scattering equipment, because this technique is very important to measure very small samples, thin film, and very small area of bulk materials. We succeeded to observe the micro-heterogeneity of relaxor ferroelectric crystals.

我们用高稳定度的固体标准具和高灵敏度的CCD探测器构成了非扫描法布里-珀罗干涉仪。为了获得高分辨率的布里渊光谱，我们引入了稳频的绿色YAG激光器作为激发源。与市售的扫描法布里-珀罗干涉仪相比，该装置的性能已被仔细检查。120的极高精细度是通过光学系统的精心设计和调整获得的。利用该装置，我们研究了玻璃形成乙醇的弛豫过程，发现与声波耦合的弛豫过程对应于介电谱所观察到的慢β过程。此外，我们还研究了微布里渊散射设备的光学，因为该技术对于测量非常小的样品、薄膜和非常小面积的块状材料非常重要。我们成功地观察到弛豫铁电晶体的微观不均匀性。

项目成果

S.Kojima and M.Kodama: "Boson Peak in Alkali Borate Glass"Physica. B. 263-264. 336-338 (1999)

S.Kojima 和 M.Kodama：“碱硼酸盐玻璃中的玻色子峰”物理学。

G.Matsui, K.Saruta, M.Mikami and S.Kojima: "Brillouin Scattering of Acoustic Phonons in Supercooled Glass-Forming Liquid"Slow Dynamics in Complex Sys., AIP Conf.Proc.. 469. 527 (1999)

G.Matsui、K.Saruta、M.Mikami 和 S.Kojima：“过冷玻璃形成液体中声学声子的布里渊散射”复杂系统中的慢速动力学，AIP Conf.Proc.. 469. 527 (1999)

小島誠治 他: "Study of Relaxor Ferroelectrics by Micro-Brillouin Scattering"Jpn.J.Appl.Phys.. 39. 5765-5710 (2000)

Seiji Kojima 等：“通过微布里渊散射研究弛豫铁电体”Jpn.J.Appl.Phys.. 39. 5765-5710 (2000)

I..S.Park, M,Mikami and S.Kojima: "Slow Dynamics in Glass-Forming Propylene Glycol Monomethy"J. Korean Soc.. 35. S1350-S1353 (1999)

I..S.Park、M、Mikami 和 S.Kojima：“玻璃形成丙二醇单体的缓慢动力学”J。

F.Jiang and S.Kojima: "Micro-heterogeneity and relaxation in 0.65PMN -0.35PT relaxor single crystals"Appl.Phys.Lett.. 77. 1271 (2000)

F.Jiang 和 S.Kojima：“0.65PMN -0.35PT 弛豫单晶中的微观异质性和弛豫”Appl.Phys.Lett.. 77. 1271 (2000)