LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Interband and intersubband optical transition energies in a Ga0.7In0.3N/GaN quantum dot

Photo by sotti from unsplash

Abstract Binding energies of a hydrogenic donor impurity and an exciton are investigated in a Ga0.7In0.3N/GaN parabolic quantum dot taking into consideration of spatial confinement effects and the magnetic and… Click to show full abstract

Abstract Binding energies of a hydrogenic donor impurity and an exciton are investigated in a Ga0.7In0.3N/GaN parabolic quantum dot taking into consideration of spatial confinement effects and the magnetic and electric fields. The strain effects and the built-in internal fields which are related to the piezoelectricity and spontaneous polarization are inserted in the Hamiltonian of the system. Numerical calculations on electronic and optical properties are performed using variational formulism and the density matrix approach. The diamagnetic shift is obtained taking into the account the geometrical confinement effect of the dot. The magnetic and electric fields dependent interband and intraband optical transition energies are obtained in the strong and weak confinement effects. Their corresponding oscillator strengths as functions of magnetic and electric fields are investigated. The optical absorption coefficients due to intersubband and interband transitions with the photon energy are obtained. The results show that the energy shift is much influenced with the inclusion of external perturbations. Specifically, the optical absorption peak undergoes a redshift with the application of electric field whereas it suffers a blue shift when the magnetic field is applied. The results will be helpful for the experimental works on fabricating optical devices such as photodetectors and laser amplifiers using nitride based wide band gap semiconductors.

Keywords: 7in0 gan; quantum dot; transition energies; ga0 7in0; optical transition

Journal Title: Optik
Year Published: 2019

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.