Effects of hydrostatic pressure and temperature on the nonlinear optical properties of GaAs/ GaAlAs zigzag quantum well
Özet
We have examined theoretically how the temperature and
the hydrostatic pressure affect the total optical absorption
coefficients, the total refractive index changes, and the
second harmonic generation coefficients for GaAs/GaAlAs
zigzag quantum well structure. The diagonalisation method
and the effective mass approximation have been used to
obtain the numerical solution of the Schrödinger equation
and energy levels, respectively. The analytical expressions
of the optical properties were obtained by using the
compact density matrix and iterative methods. When the
temperature (hydrostatic pressure) is increased, the
resonant peaks’ positions of the total optical absorption
coefficients and the relative refractive index changes are
shifted to higher energies/blueshift (lower energies/redshift)
with amplitude increment (decrement). Additionally,
the resonant peak position of the second harmonic
generation coefficient shifts to higher energies/blueshift
(lower energies) and also decrease (increase) in magnitude
with increasing temperature (hydrostatic pressure).