Анотація:
he second-harmonic generation (SHG) susceptibility of wurtzite type gallium
nitride with single quantum wells has been theoretically investigated in the framework of
the compact-density-matrix approach. The confined wave functions and energies of
electrons in GaN/AlxGa₁₋xN have been calculated in the effective-mass approximation,
solving the Schrödinger equation by Numerov’s method using the second and fourth
order approximations for the derivatives. The numerical results for typical
GaN/Al₀.₁₅Ga₀.₈₅N quantum wells show that a strong SHG effect can be realized in
electric field by choosing some optimized structural parameters.