Exciton Ionization, Franz−Keldysh, and Stark Effects in Carbon Nanotubes
نویسندگان
چکیده
منابع مشابه
Exciton ionization, Franz-Keldysh, and Stark effects in carbon nanotubes.
We calculate the optical properties of carbon nanotubes in an external static electric field directed along the tube axis. We predict strong Franz-Keldysh oscillations in the first and second band-to-band absorption peaks, quadratic Stark effect of the first two excitons, and the field dependence of the bound exciton ionization rate for a wide range of tube chiralities. We find that the phonon-...
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We present a thorough analysis of one- and two-color transient absorption measurements performed on single- and double-walled semiconducting carbon nanotubes. By combining the currently existing models describing exciton-exciton annihilation-the coherent and the diffusion-limited ones-we are able to simultaneously reproduce excitation kinetics following both E11 and E22 pump conditions. Our sim...
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The goal of this chapter is to review the importance of excitons to single-wall carbon nanotube (SWNT) optics. We have developed the presentation for both researchers in the SWNT field who want to learn more about the unusual aspects of SWNT exciton photophysics and researchers more knowledgeable about the physics of excitons, but not about SWNT physics. Excitons in SWNTs are special because gr...
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We report on original nonlinear spectral hole-burning experiments in single wall carbon nanotubes that bring evidence of pure dephasing induced by exciton-exciton scattering. We show that the collision-induced broadening in carbon nanotubes is controlled by exciton-exciton scattering as for Wannier excitons in inorganic semiconductors, while the population relaxation is driven by exciton-excito...
متن کاملExciton-exciton annihilation in single-walled carbon nanotubes
Leonas Valkunas Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, USA; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720-1460, USA; Institute of Physics, Savanoriu Ave. 231, 02300 Vilnius, Lithuania; and Theoretical Physics Department, Faculty of Physics of Vilnius University, Sauletekio Ave. 9, building ...
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ژورنال
عنوان ژورنال: Nano Letters
سال: 2007
ISSN: 1530-6984,1530-6992
DOI: 10.1021/nl0625022