Terahertz (THz) light has proven to be a fine tool to probe and control quasi-particles and
collective excitations in solids, to drive phase transitions and associated changes in material …

Floquet engineering is a promising way of controlling quantum system with photon-dressed
states on an ultrafast time scale. So far, the energy structure of Floquet states in solids has …

We investigate the photon-dressed state of excitons in bulk GaAs by optical pump-probe
spectroscopy. We reveal that the high-energy branch of the dressed states continuously …

The perturbed free induction decay (PFID) observed in ultrafast infrared spectroscopy was
used to unveil the rates at which different vibrational modes of the same atomic-scale defect …

Nonlinear optical signals in optically driven quantum systems can reveal coherences and
thereby open up the possibility for manipulation of quantum states. While the limiting cases …

We use Floquet theory to study the effects of laser light coupling to an electron–hole pair
confined in a quantum wire. Fast oscillating electric field directed along the wire …

External electric fields are highly attractive for dynamical manipulation of excitons in two-
dimensional materials. Here, we theoretically study the ionization of excitons in monolayer …

半導体を光励起すると, 負に帯電した電子と正に帯電した正孔の集団が生成される.
密度が低ければ, 電子と正孔は励起子と呼ばれる束縛状態を作って安定化し …