Out-of-equilibrium dynamics in electrically-biased carbon nanotubes

Abstract

Low-dimensional materials such as single-wall carbon nanotubes (CNTs) and transition-metal dichalcogenides are potential materials for developing the next generation of optoelectronic devices. Understanding ultrafast dynamics in these materials is key towards this realization. Here, we study the out-of-equilibrium dynamics in electrically-biased CNTs by probing the free carriers at different time scales after photoexcitation, using terahertz emission and photocurrent measurement techniques. We then explain our results in combination with theoretical simulations using a realistic CNT band structure and taking into account all possible scattering pathways.