Budget Amount *help |
¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2009: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2008: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
|
Research Abstract |
In semiconducting carbon nanotubes, optical properties are dominated by large oscillator strength and large binding energy of one-dimensional excitons and, therefore, large third-order optical nonlinearity is expected to be observed. In this study, we have measured coherent nonlinear optical spectra by femtosecond transient absorption spectroscopy. We have found a new kind of coherent nonlinear optical responses originating from exciton-exciton scattering as well as optical Stark effects generally observed in low-dimensional semiconductors under a near-resonant excitation condition.
|