Nonlinear optical response from excitons in C60,C70, and higher fullerenes

Nonlinear Optical Response from Excitons in Soliton Lattice Systems

Exciton eects on conjugated polymers and the resulting optical nonlinearities are investigated in soliton lattice systems. The magnitude of the THG at the 10 percent doping increases by the factor about 10 2 from that of the neutral system. The huge increase by the order two is common for several choices of Coulomb interaction strengths, and is seen in open systems as well as in periodic system...

Coulomb interaction effects on nonlinear optical response in C60, C70, and higher fullerenes

Nonlinear optical properties in the fullerene C60 and the extracted higher fullerenes – C70, C76, C78, and C84 – are theoretically investigated by using the exciton formalism and the sum-overstates method. We find that off-resonant third order susceptibilities of higher fullerenes are a few times larger than those of C60. The magnitude of nonlinearity increases as the optical gap decreases in h...

Optical response and excitons in gapped graphene

Nonlinear optical response from excitons in soliton lattice systems with open boundaries

Exciton effects on conjugated polymers and the resulting optical nonlinearities are investigated in soliton lattice states. We use the Su-Schrieffer-Heeger model with long-range Coulomb interactions. The third-harmonic generation (THG) at off-resonant frequencies is calculated as functions of the soliton concentration and the chain length of the polymer. The magnitude of the THG at the 10 perce...

Nonlinear Optical Response from Excitons in Soliton Lattice Systems of Doped Conducting Polymers

Exciton effects on conjugated polymers and the resulting optical nonlinearities are investigated in soliton lattice states. We use the Su-Schrieffer-Heeger model with long-range Coulomb interactions for electrons. The thirdharmonic generation (THG) at off-resonant frequencies is calculated as functions of the soliton concentration and the chain length of the polymer. The magnitude of the THG wi...