| Project/Area Number |
11555019
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B).
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
Applied physics, general
|
|---|
| Research Institution | University of Tsukuba |
|---|
Principal Investigator |
KOJIMA Seiji Institute of Materials Science, University of Tsukuba, Associate Professor, 物質工学系, 助教授 (90134204)
|
|---|
| Project Period (FY) |
1999 – 2000
|
| Project Status |
Completed (Fiscal Year 2000)
|
| Budget Amount *help |
¥10,600,000 (Direct Cost: ¥10,600,000)
Fiscal Year 2000: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1999: ¥6,600,000 (Direct Cost: ¥6,600,000)
|
|---|
| Keywords | 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 |
|---|
| 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.
|
