The addition of the moiety to the sidewall of the nanotube disrupts the oscillator strength that gives rise to RBM feature and hence causes decay of these features.
12.
This started with the spectra of dilute solutions in which the giant oscillator strength of impurity excitons was identified and the position of lower energy band of crystalline naphthalene was established.
13.
For high enough densities, all E _ \ lambda energies correspond to continuum states and some of the oscillators strengths may become negative-valued due to the Pauli-blocking effect.
14.
In the landmark work, the C 3 value for atomic lithium was determined to a higher-precision than any atom's previously measured oscillator strength, by an order of magnitude.
15.
This simple result reflects physics of the phenomenon of "'giant oscillator strength "': coherent oscillation of electron polarization in the volume of about a _ i ^ 3 > > v.
16.
Impurities can bind excitons, and when the bound state is shallow, the oscillator strength for producing bound excitons is so high that impurity absorption can compete with intrinsic exciton absorption even at rather low impurity concentrations.
17.
If the charge, \ scriptstyle { e }, is omitted from the electric dipole operator during this calculation, one obtains \ scriptstyle { \ mathbf { R } _ \ alpha } as used in oscillator strength.
18.
Where \ hbar \ omega is the probe-photon energy, F _ \ lambda is the oscillator strength of the exciton state \ lambda, and \ gamma _ \ lambda is the dephasing constant associated with the exciton state \ lambda.
19.
The oscillator strength f _ i for producing a bound exciton can be expressed through its wave function \ Psi _ i ( \ boldsymbol { r } _ e, \ boldsymbol { r } _ h ) and f _ { \ rm ex } as
20.
Anomalously high intensity of the impurity-exciton lines indicate their giant oscillator strength of about f _ i \ sim10 per impurity center while the oscillator strength of free excitons is only of about f _ { \ rm ex } \ sim10 ^ {-4 } per unit cell.
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