The second and third harmonic generations of a trion in quantum dots

• Published in: Journal of luminescence 2014-01, Vol.145, p.283-287
• Main Author: Xie, Wenfang
• Format: Article
• Language: English
• Subjects: Approximation; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Electron states; Exact sciences and technology; Excitation; Exciton; Excitons and related phenomena; Harmonic generations; Luminescence; Materials science; Mathematical analysis; Nanoscale materials and structures: fabrication and characterization; Nonlinear optics; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Physics; Quantum dot; Quantum dots; Trions; Wave functions
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2013.08.015

The properties of the second and third harmonic generations are investigated for a negatively charged exciton (trion) in a quantum dot. Calculations are performed by using the matrix diagonalization method and compact-density approach within the effective-mass approximation. Based on the computed energies and wave functions, the second and third harmonic generations have been studied for the heavy-hole and light-hole trions, respectively. The results show that the second and third harmonic generation coefficients are strongly affected by the confinement frequency, the hole mass and the hydrostatic pressure. We find that the second and third harmonic generation coefficients of the trion are larger than those of the exciton in the quantum dot with the same conditions. •The properties of the second and third harmonic generations are investigated for a trion in a quantum dot.•The second and third harmonic generations are strongly affected by the confinement frequency.•One can obtain the considerable increase in nonlinear optical properties when an exciton bound an additional electron.