Nonlinear optical rectification in asymmetric quantum dots with an external static magnetic field

• Optical rectification depending strongly on the external magnetic field.
• Peak shifting as the magnetic field or the radius of the quantum dot changes.
• Asymmetric potential and radius of quantum dot affecting optical rectification.

The optical rectification (OR) coefficient in asymmetric quantum dots (QDs) with an external static magnetic field is theoretically investigated. Using the effective-mass approximation, we obtain the confined wave functions and energies of electrons in QDs. We also obtain the OR coefficient by the compact-density-matrix approach and the iterative method. The results of numerical calculations for the typical GaAs/AlGaAs QDs show that the OR coefficient depends strongly on the external static magnetic field, parameters of the asymmetric potential and radius of the QD. Moreover, the peak of the OR coefficient shifts with the magnetic field or the radius of the QD changing.

Dependence of the OR coefficient |χ0(2)| on the incident photon energy ℏωℏω for R=8 nm, 9 nm, and 10 nm. Figure optionsDownload as PowerPoint slide