2000 Fiscal Year Final Research Report Summary
Rapid acquisition of Brillouin spectra by non-scanning Fabry-Perot interferometer
| Project/Area Number |
11555019
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Applied physics, general
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| Research Institution | University of Tsukuba |
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Principal Investigator |
KOJIMA Seiji Institute of Materials Science, University of Tsukuba, Associate Professor, 物質工学系, 助教授 (90134204)
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| Project Period (FY) |
1999 – 2000
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| Keywords | Brillouin scattering / interference spectrometer / solid etalon / finesse / relaxation / activation energy / glass / acoustic phonon |
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| Research Abstract |
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.
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