Exciton dephasing and multiexciton recombinations in a single carbon nanotube

Matsuda, Kazunari; Inoue, Tadashi; Murakami, Yoichi; Maruyama, Shigeo; Kanemitsu, Yoshihiko

doi:10.1103/physrevb.77.033406

Cited by 99 publications

(144 citation statements)

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“…Although phonon-induced broadening was experimentally investigated by means of various techniques for SWNTs of different diameters [13,[16][17][18]20], there is so far no theoretical calculation of the exciton-phonon coupling efficiency in these 1D systems. In order to provide a quantitative interpretation of our measurements, we have calculated the temperature-dependence of the excitonic homogeneous linewidth due to the interaction with acoustic phonons.…”

Section: Figmentioning

confidence: 99%

“…where Γ 0 is the residual homogeneous linewidth in the limit of zero temperature (in the range of several meVs [13,[16][17][18]), aT the broadening due to low-energy acoustic phonons, and b exp [18]. In our case, the fit displayed as solid red line in Fig.2 is obtained by taking Γ 0 =6.9±0.2 meV, and a=32±3 µeV.K −1 .…”

mentioning

confidence: 99%

“…Such an issue can be experimentally addressed by performing measurements either at the scale of a single SWNT [13][14][15][16][17][18][19], or in SWNTs ensembles by means of nonlinear techniques such as four-wave mixing [20]. There is nevertheless a large dispersion in the quantitative analysis of the different temperature-dependent experiments [17,18,20]. Moreover, no theoretical calculation was reported so that there is still a lack for a quantitative interpretation of the phonon-induced broadening and its diameter dependence [18].…”

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Phonon-induced dephasing in single-wall carbon nanotubes

et al. 2011

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International audienceWe report on original nonlinear spectral hole-burning experiments in ensembles of single-wall carbon nanotubes. We have measured the temperature dependence of the excitonic homogeneous linewidth from 5 K up to room temperature. We show that the phonon-induced broadening in the weak coupling regime predominantly consists in pure dephasing. We present theoretical calculations of the exciton scattering rate due to phonon absorption within a one-dimensional framework for both excitons and phonons. We obtain a fair agreement with our experimental data and we discuss the specific properties of the exciton-phonon coupling in single-wall carbon nanotubes

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Section: Figmentioning

confidence: 99%

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Phonon-induced dephasing in single-wall carbon nanotubes

et al. 2011

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“…The temperature dependencies of the transition rate or energy broadening for excitons near band edges are monotonically increasing functions, which have been attributed to scattering from acoustic phonons around the point and analyzed by using linear functions, sometimes plus the Bose-Einstein distribution with a constant phonon frequency. [24][25][26][27] Recent experiments on the exciton-acousticphonon scattering using nanotubes with an almost unique chirality 24 or single isolated nanotubes 25,26 are suitable to quantitative comparison between experiments and theories.…”

Section: Introductionmentioning

confidence: 99%

“…So far, many theoretical studies on this subject have been reported which include, for example, excitons trapped by impurity potentials, 15,16 phonon side bands for exciton peaks in optical spectra, 17 the interaction of excitons with acoustic and optical phonons in zigzag nanotubes, 18 and the chirality dependence of the Raman scattering intensity for the breathing-mode phonons. 19,20 Experimentally, transition rates, [21][22][23][24] the linewidth of exciton peaks, [25][26][27] and diffusion constants and diffusion lengths [28][29][30][31][32][33][34][35] have been intensively studied for excitons interacting with disorders and phonons in nanotubes. The results strongly depend on the experiments.…”

Section: Introductionmentioning

confidence: 99%

Exciton scattering from impurities and acoustic phonons in carbon nanotubes

Fujimoto

Uryu

2013

Phys. Rev. B

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Exciton scattering from impurities and acoustic phonons in semiconducting carbon nanotubes is theoretically studied in an effective-mass approximation. A selection rule for transitions resulting from the scattering is obtained, showing that the ground-state exciton for the lowest-exciton band is never scattered from long-range impurities and deformation potentials near the band edge. This arises from the symmetry of nanotubes for the successive transformations of the charge conjugation and parity and for the reflection of the coordinate along the nanotube axis. Agreement of numerical results with recent experiments supports the validity of this selection rule.

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Optoelectronic Properties of Single‐Wall Carbon Nanotubes

et al. 2012

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Single-wall carbon nanotubes (SWCNTs), with their uniquely simple crystal structures and chirality-dependent electronic and vibrational states, provide an ideal laboratory for the exploration of novel 1D physics, as well as quantum engineered architectures for applications in optoelectronics. This article provides an overview of recent progress in optical studies of SWCNTs. In particular, recent progress in post-growth separation methods allows different species of SWCNTs to be sorted out in bulk quantities according to their diameters, chiralities, and electronic types, enabling studies of (n,m)-dependent properties using standard macroscopic characterization measurements. Here, a review is presented of recent optical studies of samples enriched in 'armchair' (n = m) species, which are truly metallic nanotubes but show excitonic interband absorption. Furthermore, it is shown that intense ultrashort optical pulses can induce ultrafast bandgap oscillations in SWCNTs, via the generation of coherent phonons, which in turn modulate the transmission of a delayed probe pulse. Combined with pulse-shaping techniques, coherent phonon spectroscopy provides a powerful method for studying exciton-phonon coupling in SWCNTs in a chirality-selective manner. Finally, some of the basic properties of highly aligned SWCNT films are highlighted, which are particularly well-suited for optoelectronic applications including terahertz polarizers with nearly perfect extinction ratios and broadband photodetectors.

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Exciton dephasing and multiexciton recombinations in a single carbon nanotube

Abstract: We studied the temperature and excitation intensity dependence of exciton luminescence in individual single-walled carbon nanotubes (SWNTs) using single

Cited by 99 publications

References 32 publications

Phonon-induced dephasing in single-wall carbon nanotubes

Phonon-induced dephasing in single-wall carbon nanotubes

Exciton scattering from impurities and acoustic phonons in carbon nanotubes

Optoelectronic Properties of Single‐Wall Carbon Nanotubes

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