Excitonic optical transitions characterized by Raman excitation profiles in single-walled carbon nanotubes

Tran, Huy-Nam; Blancon, Jean-Christophe; Huntzinger, Jean-Roch; Arenal, Raúl; Popov, V. N.; Zahab, Ahmed-Azmi; Ayari, A.; San-Miguel, Alfonso; Vallée, Fabrice; Fatti, Natalia Del; Sauvajol, Jean‐Louis; Paillet, Matthieu

doi:10.1103/physrevb.94.075430

Cited by 20 publications

(16 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained E op and Γ are summarized in Table 1. The widths of the excitation profiles are similar to the width of RBM or G-band excitation profiles in SWCNTs [27][28][29]. The width of the peak located at 1856 cm −1 is wider than the widths of the other peaks, indicating that the 1856 cm −1 peak includes even more components than the others.…”

Section: Resultssupporting

confidence: 57%

See 1 more Smart Citation

Electronic band gaps of confined linear carbon chains ranging from polyyne to carbyne

Shi¹,

Rohringer²,

Wanko³

et al. 2017

Phys. Rev. Materials

120

View full text Add to dashboard Cite

Ultra long linear carbon chains of more than 6000 carbon atoms have recently been synthesized within doublewalled carbon nanotubes, and they show a promising new route to one-atom-wide semiconductors with a direct band gap. Theoretical studies predicted that this band gap can be tuned by the length of the chains, the end groups, and their interactions with the environment. However, different density functionals lead to very different values of the band gap of infinitely long carbyne. In this work, we applied resonant Raman excitation spectroscopy with more than 50 laser wavelengths to determine for the first time the band gap of long carbon chains encapsulated inside DWCNTs. The experimentally determined band gaps ranging from 2.253 to 1.848 eV follow a linear relation with Raman frequency. This lower bound is the smallest band gap of linear carbon chains observed so far. The comparison with experimental data obtained for short chains in gas phase or in solution demonstrates the effect of the DWCNT encapsulation, leading to an essential downshift of the band gap. This is explained by the interaction between the carbon chain and the host tube, which greatly modifies the chain's bond length alternation. arXiv:1705.02259v2 [cond-mat.mtrl-sci]

show abstract

Section: Resultssupporting

confidence: 57%

“…These six profiles indicate strong electronic resonances that peak at different energy for each group of LLCCs, which matches the electronic energy gap of LLCCs. The profiles can be fitted by a semi-classical resonance Raman model [27][28][29]:…”

Section: Resultsmentioning

confidence: 99%

Electronic band gaps of confined linear carbon chains ranging from polyyne to carbyne

Shi¹,

Rohringer²,

Wanko³

et al. 2017

Phys. Rev. Materials

120

View full text Add to dashboard Cite

show abstract

“…4(c)]. It is worth noting that such an agreement on the values of the excitonic transition energy and damping parameter derived from the analysis of the REP and the optical absorption spectrum has been recently reported for SWNTs [20].…”

Section: -21 Ev Excitation Range [Figs 4(c) and 4(d) Respectively)supporting

confidence: 79%

“…In all the measurements, both incident and scattered light polarizations are along the nanotube axis. To obtain the resonance excitation profile (REP), the experimental intensity of each mode measured at a specific excitation energy was normalized by the intensity of the 521 cm −1 line of silicon [Si (111)] which was taken as a reference sample and corrected by the calibrated total transmission of our optical system for the different scattered light polarizations to take into account the difference in sensitivity at the absolute wavelength of the measured nanotubes modes and at the absolute wavelength of the Si line [20].…”

Section: Sample and Experimental Methodsmentioning

confidence: 99%

Quantum interference effects on the intensity of the G modes in double-walled carbon nanotubes

et al. 2017

Self Cite

View full text Add to dashboard Cite

The effects of quantum interferences on the excitation dependence of the intensity of G modes have been investigated on single-walled carbon nanotubes [Duque et al., Phys. Rev. Lett. 108, 117404 (2012)]. In this work, by combining optical absorption spectroscopy and Raman scattering on individual index identified double-walled carbon nanotubes, we examine the experimental excitation dependence of the intensity of longitudinal optical and transverse optical G modes of the constituent inner and outer single-walled carbon nanotubes. The observed striking dependencies are understood in terms of quantum interference effects. Considering such effects, the excitation dependence of the different components of the G modes permits us to unambiguously assign each of them as originating from the longitudinal or transverse G modes of inner and outer tubes.

show abstract

“…Finally, our measurements constitute a starting point for the further investigation of anti-Stokes scattering in carbyne. In particular, exploring the outgoing anti-Stokes resonance might not only increase the absolute anti-Stokes signal, as shown for carbon nanotubes 8 , but also shed more light on the exact nature of optical transitions in carbyne 1,20,64 .…”

Section: Discussionmentioning

confidence: 99%

Raman Sideband Thermometry of Single Carbyne Chains

Tschannen¹,

Frimmer²,

Gordeev³

et al. 2021

Preprint

View full text Add to dashboard Cite

We demonstrate Raman sideband thermometry of single carbyne chains confined in double-walled carbon nanotubes. Our results show that carbyne's record-high Raman scattering cross section enables anti-Stokes Raman measurements at the single chain level. Using laser irradiation as a heating source, we exploit the temperature dependence of the anti-Stokes/Stokes ratio for local temperature sensing. Due to its molecular size and its large Raman cross section carbyne is an efficient probe for local temperature monitoring, with applications ranging from nanoelectronics to biology.

show abstract

Excitonic optical transitions characterized by Raman excitation profiles in single-walled carbon nanotubes

Cited by 20 publications

References 42 publications

Electronic band gaps of confined linear carbon chains ranging from polyyne to carbyne

Electronic band gaps of confined linear carbon chains ranging from polyyne to carbyne

Quantum interference effects on the intensity of the G modes in double-walled carbon nanotubes

Raman Sideband Thermometry of Single Carbyne Chains

Contact Info

Product

Resources

About