Novel Laser Ultrasonic Technique for Measuring Ultrasmall Region Utilizing Near-field Optics
| Project/Area Number |
25820005
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Materials/Mechanics of materials
|
|---|
| Research Institution | Nagaoka University of Technology |
|---|
Principal Investigator |
MATSUYA Iwao 長岡技術科学大学, 工学(系)研究科(研究院), 助教 (00514465)
|
|---|
| Project Period (FY) |
2013-04-01 – 2015-03-31
|
| Project Status |
Completed (Fiscal Year 2014)
|
| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
|
|---|
| Keywords | 近接場光 / エバネッセント光 / レーザ超音波 / プラズマ / アブレーション / 閉込め効果 / 閉じ込め効果 |
|---|
| Outline of Final Research Achievements |
Generation of ultrasound waves in aluminum utilizing evanescent light during total internal reflection at prism surface is investigated. It has been found that ultrasound can be generated in the aluminum specimen only by the evanescent light. The amplitudes of ultrasound generated by evanescent light were approximately 9 times larger than that generated by direct laser irradiation. The obtained directivity pattern shows considerable intensity at 0°, which reveals that the ultrasound in this experiment is generated by ablation effect. According to the theoretical speculation, when the plasma is generated by laser irradiation in confined geometry, its impulse pressure is significantly enhanced.
|
Report
(3 results)
Research Products
(48 results)
