| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2007: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Research Abstract |
Random lasers, which have properties of both a conventional laser and an illuminating light source, have not been in practical use because of their low emission efficiencies. We introduced a self-similar (fractal) structure for a random laser medium to improve the efficiency. The statistical properties of three-dimensional intensity distributions formed with fractal speckle patterns have been elucidated. An electromagnetic simulation has shown that the fractal structures are suitable for random lasing. Experiments using a photopolymer indicated that a random laser can be fabricated by illuminating a polymer medium with laser speckles.
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