Nam Hun Park

TL;DR: Elect electrically manipulable in-line graphene devices by integrating graphene-based field effect transistors on a side-polished fibre will open promising way for actively controlled optoelectronic and nonlinear photonic devices in all-fibre platform with greatly enhanced graphene–light interaction.

TL;DR: An efficient all-fiber saturable absorber (SA) that evanescently interacts with a graphene monolayer by employing an over-cladding structure on high-quality monolayers that uniformly covered the side-polished fiber is demonstrated.

TL;DR: In this article, the authors show that the third-order optical nonlinearity can be considerably modified depending on the stacking angle in twisted bilayer graphene (tBLG) and show that rotation-induced tuneable nonlinear optics in stacked two-dimensional material systems can be achieved.

TL;DR: An optically tunable graphene saturable absorber is demonstrated to manipulate the laser operation in pulsed fiber laser system and it is observed that the repetition rate of the Q-switched laser could be continuously tuned according to the modulation frequency of the applied external signal.

TL;DR: In this article, the authors investigated the optical and electrical properties of a graphene saturable absorber (SA) and a graphene-SA-based mode-locked Er fiber laser in gamma-ray radiation, and the measured results confirm the high potential of graphene SAs and graphene SA-based laser in various outer space environments as well as other radiation environments, including particle accelerators and radiation-based medical instruments.