Measurement of the optical Stark effect in semiconducting carbon nanotubes

• Published in: Applied physics. A, Materials science & processing Vol. 96; no. 2; pp. 283 - 287
• Main Authors: Song, Daohua, Wang, Feng, Dukovic, Gordana, Zheng, Ming, Semke, E. D., Brus, Louis E., Heinz, Tony F.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01-08-2009; Springer
• Subjects: Carbon nanotubes; Characterization and Evaluation of Materials; Condensed Matter Physics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Coulomb friction; Exact sciences and technology; Femtosecond; Machines; Manufacturing; Nanotechnology; Nanotubes; Optical and Electronic Materials; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures; Photons; Physics; Physics and Astronomy; Processes; Pumps; Single wall carbon nanotubes; Spectroscopy; Stark effect; Surfaces and Interfaces; Thin Films; 42.50.Hz; 71.35.-y; 78.67.Ch; Pump probe spectrometry; Many body theory; Energy gap; Singlewalled nanotube; Excitons; Semiconductor materials; Two-level systems; Carbon nanotubes; Stark effect; Spectral line shift; Coulomb interaction
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-009-5202-6

A strong optical Stark effect has been observed in (6,5) semiconducting single-walled carbon nanotubes by femtosecond pump-probe spectroscopy. The response is characterized by an instantaneous blueshift of the excitonic resonance upon application of pump radiation at photon energy well below the band gap. The large Stark effect is attributed to the enhanced Coulomb interactions present in these one-dimensional materials.