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0026818454
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V. A. Chitta, R. E. M. de Bekker, J. C. Maan, S. J. Hawksworth, J. M. Chamberlain, M. Henini, and G. Hill: Surf. Sci. 263 (1992) 227.
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(1992)
Surf. Sci
, vol.263
, pp. 227
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Chitta, V.A.1
de Bekker, R.E.M.2
Maan, J.C.3
Hawksworth, S.J.4
Chamberlain, J.M.5
Henini, M.6
Hill, G.7
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10
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34547905932
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The effective atomic unit (a.u, is given using the effective mass of electron m* and the dielectric constant κs for the target materials. The effective Bohr radius is given as aB*, ℏ2(4πκs, m*e2, 98 Å when we use m*, 0.067m0 and κs, 12.4κ0 for GaAs QD. Similarly, the effective Rydberg constant Ry* is given as Ry*, m*e4/(4πκ sℏ)2, 5.9 meV
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2 = 5.9 (meV).
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15
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34547864818
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We here define the index, i, ny, 1 to indicate the subband directly connecting to the node number toward the y direction
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y - 1 to indicate the subband directly connecting to the node number toward the y direction.
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16
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34547884855
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We here determine the stationary state when the transmitted wave packet is well separated from the reflected wave packet and also the relative strength of the distribution in the wave vector converges on a steady value
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We here determine the stationary state when the transmitted wave packet is well separated from the reflected wave packet and also the relative strength of the distribution in the wave vector converges on a steady value.
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17
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34547920910
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3).
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3).
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18
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34547864439
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g are the half-width of the energy for the transmittance peak, the width of the DBS, the tunneling probability and the group velocity, respectively.
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g are the half-width of the energy for the transmittance peak, the width of the DBS, the tunneling probability and the group velocity, respectively.
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19
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34547875944
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g). However, this type of multiprocess is not considered because of its significant small transition probability.
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g). However, this type of multiprocess is not considered because of its significant small transition probability.
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20
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34547859859
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2, where A (= ωij -ω) is given by the energy difference between the frequencies of the resonant states ωij = ωi - ωj and that of the external photon electric field ω, One should also consider a change in electron density, which produces a discrepancy due to an inflow and an outflow of a Gaussian wave packet. Apart from these physical influences, the finite spatial grid employed here has difficulty in reproducing the resonant feature critically.
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2, where A (= ωij -ω) is given by the energy difference between the frequencies of the resonant states ωij = ωi - ωj and that of the external photon electric field ω, One should also consider a change in electron density, which produces a discrepancy due to an inflow and an outflow of a Gaussian wave packet. Apart from these physical influences, the finite spatial grid employed here has difficulty in reproducing the resonant feature critically.
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21
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34547874458
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Beyond the rotation wave approximation, the resonant process causes the resonant frequency of the harmonic oscillation 2ω besides that of the fundamental resonant frequency ω, being equal to the energy difference between the two resonant states. This harmonic oscillation superposed in the Rabi oscillation should appear irrespective of the single or the two-photon processes.
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Beyond the rotation wave approximation, the resonant process causes the resonant frequency of the harmonic oscillation 2ω besides that of the fundamental resonant frequency ω, being equal to the energy difference between the two resonant states. This harmonic oscillation superposed in the Rabi oscillation should appear irrespective of the single or the two-photon processes.
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22
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34547882212
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0 further causes the Rabi splitting to be obscure. However, we found a characteristic separation due to this Rabi splitting in individual k peaks when we employed a finer grid-mesh.
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0 further causes the Rabi splitting to be obscure. However, we found a characteristic separation due to this Rabi splitting in individual k peaks when we employed a finer grid-mesh.
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23
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34547870367
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Let us first reproduce the RT feature under the zero-photon injection. According to Fig. 4, the effective lifetime τeffout is decomposed into two partial lifetimes of τeffin, 0.507ps and τeffout, 1.30ps. Figure 4 also reveals that the probability density at the QD decreases exponentially with time. This feature indicates that the reduction in the resonant state is intrinsically expressed by its own lifetime once when the resonant state is established. Thus, we fix the parameter Γ1out as ℏ/ τeffout, 0.767. The solution obtained using this parameter well simulates the characteristics in the time-dependent reduction in the electron probability density at the QD under a zero photon electric field
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out = 0.767. The solution obtained using this parameter well simulates the characteristics in the time-dependent reduction in the electron probability density at the QD under a zero photon electric field.
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24
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34547877412
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1 = 1.544 is obtained by the fitting procedure in Fig. 4.
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1 = 1.544 is obtained by the fitting procedure in Fig. 4.
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