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Two paramount challenges in carbon nanotube research are achievingchirality-controlled synthesis and understanding chirality-dependent devicephysics. High-throughput and in-situ chirality and electronic structuralcharacterization of individual carbon nanotubes is crucial for addressing thesechallenges. Optical imaging and spectroscopy has unparalleled throughput andspecificity, but its realization for single nanotubes on substrates or indevices has long been an outstanding challenge. Here we demonstrate video-rateimaging and in-situ spectroscopy of individual carbon nanotubes on varioussubstrates and in functional devices using a novel high-contrastpolarization-based optical microscopy. Our technique enables the completechirality profiling of hundreds of as-grown carbon nanotubes. In addition, wein-situ monitor nanotube electronic structure in active field-effect devices,and observe that high-order nanotube optical resonances are dramaticallybroadened by electrostatic doping. This unexpected behaviour points to stronginterband electron-electron scattering processes that can dominate ultrafastdynamics of excited states in carbon nanotubes.

High-throughput Imaging and Spectroscopy of Individual Carbon Nanotubes in Devices with Light Microscopy