infrared millimeter terahertz waves scientific conferences

Owing to their energy level splitting in the meV range, large graphene quantum dots (GQD) are very attractive candidates for THz technology. Whereas their electronic properties have been widely studied by transport measurements, only very few works have been focused on their interaction with THz radiation. Here, we report a theoretical and experimental investigation of the optical properties at THz frequencies of large GQD. Using tight-binding modeling, we show the existence of mixed-states that should couple efficiently to THz photons. Furthermore, we experimentally demonstrate THz optical absorption of an array of circular 75 nm-diameter GQD at 4K and 300K.