Effects of intense laser field and position dependent effective mass in Razavy quantum wells and quantum dots
Date
2021Metadata
Show full item recordAbstract
Using the effective mass and parabolic band approximations, we investigated the position-dependent effective
mass and non-resonant intense laser field effects on the first and third-order corrections of the absorption and
relative changes of the refraction index coefficients for intersubband transition in Razavy-like quantum wells.
Calculations have been extended to the spherical Razavy-like quantum dots electronic structure. We have shown
that depending on the combinations of the Razavy-like potential parameters, the quantum wells can evolve from
parabolic confinement in an isolated quantum well to a configuration of two coupled quantum wells. We have
shown that in general the transition energies (dipole matrix elements) between the ground state and the first
excited state: i) are decreasing (increasing) functions of M-parameter, ii) are increasing (decreasing) functions of
A-parameter, iii) they increase (decrease) when considering the position-dependent effective mass effects, and iv)
are increasing (decreasing) functions of the intense laser field parameter. In the case of the optical absorption and
relative changes in the refractive index coefficients, we have shown blueshifts or redshifts by changing the A-, M-,
and α0-parameters and by considering the effects of the position-dependent effective mass. In spherical quantum
dots, we have shown that with an appropriate value of A- and M-parameters the system can evolve from a
spherical quantum dot with infinite parabolic potential.