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Optical properties of open-ended armchair single-wall carbon nanotubes (SW-CNT) are studied by numerical simulations. The polarizability tenzor as main identifier of properties was analysed for different types of SW-CNT with various lengths. It is revealed that increase in nanotube length cause an increasing of polarizability degree that leads to essential change of SW-CNT optical properties.
On the basis of numerical simulations an optical transient nutation in frequency-modulated cw laser beams is investigated. This effect is developed on high modulation amplitude of frequency - modulated cw laser beam propagating in resonance conditions. At modulation periods comparable with the atomic relaxation times the time dependence of the output intensity exhibits the combined manifestations...
Coherent population trapping (CPT) resonance formation is modeled numerically in a three-level Ξ- and Λ- systems with one of the near-resonance fields being frequency-modulated. The model is based on density matrix equations in RW approximation with atomic relaxation properly taken into account. Slow modulation is shown to be equivalent to CW excitation with the frequency changed point by point. As...