激子
碳纳米管
偶极子
碳纳米管的光学性质
材料科学
半导体
凝聚态物理
比克西顿
电场
兴奋剂
量子点
斯塔克效应
极化(电化学)
光谱学
化学物理
纳米技术
分子物理学
光电子学
化学
物理
纳米管
量子力学
物理化学
作者
Jan T. Glückert,Lyudmyla Adamska,Wolfgang Schinner,Matthias Hofmann,Stephen K. Doorn,Sergei Tretiak,Alexander Högele
出处
期刊:Physical review
日期:2018-11-12
卷期号:98 (19)
被引量:9
标识
DOI:10.1103/physrevb.98.195413
摘要
We study both experimentally and theoretically the fundamental interplay of exciton localization and polarization in semiconducting single-walled carbon nanotubes. From Stark spectroscopy of individual carbon nanotubes at cryogenic temperatures we identify localized excitons as permanent electric dipoles with dipole moments of up to 1e{\AA}. Moreover, we demonstrate field-effect doping of localized excitons with an additional charge which results in defect-localized trions. Our findings provide not only fundamental insight into the microscopic nature of localized excitons in carbon nanotubes, they also signify their potential for sensing applications and may serve as guidelines for molecular engineering of exciton-localizing quantum dots in other atomically thin semiconductors including transition metal dichalcogenides.
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