Electronic structure of single wall carbon nanotubes in localized light field

我们观察到了生长在纳米光纤上的单壁碳纳米管的最低激子跃迁的共振瑞利散射，这是产生局域光场的可能结构之一。瑞利散射法观测到的激子线宽（~1meV）比光致发光法观测到的激子线宽更锐利。PFO分散碳纳米管的光致发光量子产率受到强声波作用下纳米管缩短的限制。我们还明确了携带掺杂碳纳米管的基本光学性质，预计将显示出对光场的大响应。

We observed the resonant rayleigh scattering of lowest exciton transition of single walled carbon nanotubes grown on the optical nanofiber which is one of the possible structures of generating localized light field. The exciton linewidth (~1meV) observed by rayleigh scattering is sharper than the exciton linewidth observed by photoluminescence. The photoluminescence quantum yield of PFO dispersed carbon nanotubes is limited by the shortening of nanotubes due to vigorous sonication. We also clarified the fundamental optical properties of carried-doped carbon nanotubes that are expected to show the large response to optical field.