Abstract

GAMBHIR, M.  and  PRASAD, V.. Study of non-linear optical properties of center and edge δ-doped multiple quantum wells. Rev. mex. fis. [online]. 2018, vol.64, n.5, pp.439-446.  Epub Nov 30, 2019. ISSN 0035-001X.

In the present paper, the linear and non-linear optical properties of GaAs/AlGaAs with on-center and on-edge delta doping are studied within the effective mass approximation. The delta potential is analytically modeled within each quantum well potential to obtain the energy levels and the corresponding wave functions using the robust finite difference method. The linear and non-linear optical absorption coefficients and changes in the refractive index are studied in the presence of a static magnetic and a periodic laser field using the density matrix approach. The obtained results show that the position of resonances and the amplitude of the optical absorption coefficients and the refractive index changes can be modified by varying the magnetic field and strength and position of doping potential. Lastly, an increase of the optical intensity appreciably changes the total absorption coefficient, as well as the total refractive index changes. Obtained results are important for the design of various electronic components such as high-power FETs and infrared photonic devices based on the intersubband transition of electrons in δ-doped MQWs.

Keywords : Multiple quantum well; delta doping; optical absorption coefficient; refractive index changes; laser; magnetic field; 73.21.Fg; 78.20.Ci; 78.67.De.

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