Ultrafast Spectroscopy of Mid-Infrared Internal Exciton Transitions of Separated Single-Walled Carbon Nanotubes

Abstract

We report a femtosecond mid-infrared study of the broadband low-energy response of individually separated (6,5) and (7,5) single-walled carbon nanotubes. Strong photoinduced absorption is observed around 200 meV, whose transition energy, oscillator strength, resonant chirality enhancement and dynamics manifest the observation of quasi-1D intra-excitonic transitions. A model of the nanotube 1s-2p cross section agrees well with the signal amplitudes. Our study further reveals saturation of the photoinduced absorption with increasing phase-space filling of the correlated e-h pairs.

5 pages, 4 figures, final version

References in corpus (7)

• Exciton binding energies in carbon nanotubes from two-photon photoluminescence
• Luminescence Decay and the Absorption Cross-Section of Individual Single-Walled Carbon Nanotubes
• Universal properties of quasi-one-dimensional excitons in semiconducting single-walled carbon nanotubes and $\pi$-conjugated polymers
• Nonlinear Photoluminescence Excitation Spectroscopy of Carbon Nanotubes: Exploring the Upper Density Limit of One-Dimensional Excitons
• Stability of 1-D Excitons in Carbon Nanotubes under High Laser Excitations
• Selection Rules for One- and Two-Photon Absorption by Excitons in Carbon Nanotubes
• Transient terahertz spectroscopy of excitons and unbound carriers in quasi two-dimensional electron-hole gases

Cited by in corpus (9)

• Femtosecond Population Inversion and Stimulated Emission of Dense Dirac Fermions in Graphene
• Broadband terahertz generation from metamaterials
• θ-Tunable Photoluminescence from Interlayer Excitons in Twisted Bilayer Graphene
• Ultrafast observation of critical nematic fluctuations and giant magnetoelastic coupling in iron pnictides
• Ultrafast terahertz probes of interacting dark excitons in chirality-specific semiconducting single-walled carbon nanotubes
• Exciton diffusion in semiconducting single-wall carbon nanotubes studied by transient absorption microscopy
• Reversible modulation and ultrafast dynamics of THz resonances in strongly photoexcited metamaterials
• Correlating Quasi-Electron Relaxation with Quantum Femtosecond Magnetism in the Order Parameter Dynamics of Insulating Manganites
• Transient Charge and Energy Balance in Graphene Induced by Ultrafast Photoexcitation