Formation of Quantum Emitters in Air-Suspended Carbon Nanotubes Using Vapor-Phase Reaction

摘要

High quality carbon nanotubes such as an air-suspended will lead to improve single photon properties. Air-suspended SWCNTs are an ideal platform as a single photon emitter because they exhibit brighter photoluminescence than liquid-dispersed SWCNTs [1,2]. Such SWCNTs keep their length and pristine surface, which leads to suppress end quenching often observed in liquid-dispersed SWCNTs [3]. Introducing color centers, however, requires to disperse SWCNTs in solution [4–7]. This process results in contaminating tube surface and quenching photoluminescence due to an interaction between SWCNTs and surrounding environments [8]. Air-suspended SWCNTs are ideal as a host of color centers, but directly immersing air-suspended SWCNTs in water inevitably destroys the suspended structures due to the high surface tension of the solvent. To use the excellent optical properties of the air-suspended carbon nanotubes with color centers, an intelligent design of chemical reaction is required without compromising the air-suspended structure.