|Budget Amount *help
¥50,050,000 (Direct Cost: ¥38,500,000、Indirect Cost: ¥11,550,000)
Fiscal Year 2012: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
Fiscal Year 2011: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
Fiscal Year 2010: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000)
Fiscal Year 2009: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
Fiscal Year 2008: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Optical properties of carbon nanotubes and graphene, which are novel low-dimensional material composed of carbon atoms, have theoretically been studied and compared with those of semiconductor-compound quantum structures. In carbon nanotubes, its one-dimensionality strongly enhances the interaction effect so that they have higher potential for external-field control of the optical responses. Absorption coefficient of monolayer graphene is known to have a universal value proportional to the fine-structure constant. This study has clarified that the continuum absorption of band-to-band transitions in semiconductor quantum wells also has the same value.