| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
We investigated solitons that are formed via the interaction of intense laser pulses with gaseous plasma. By focusing a 800-nm laser pulse onto a helium gas-jet with a relativistic intensity, electromagnetic(EM) radiation with an infrared region(2-14μm) and a teraherz region(10GHz-40THz) were observed. Since the EM radiation has a same polarization direction as the laser, it is inferred that the radiation comes from solitons. In addition, we observed scattered radiation in a 90degree shadowgraph with a counter-propagating probe pulse. The scattered radiation becomes intense as the pump laser propagates. The radiation seems to be the scattered counter-propagating probe pulse by the soliton density walls.
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