Dielectric Function Theory Calculations of Polaritons in GaN

• Authors: K.P. Korona , R. Stępniewski , J.M. Baranowski
• Languages of publication: EN

Abstracts

EN

Properties of polaritons (free excitons coupled with photons of similar energy) in gallium nitride are investigated by performing calculations based on dielectric function theory including all three excitons A, B and C (characteristic for the wurtzite structure). Moreover the excited states of excitons have been taken into account by adding Elliott's components to dielectric function. Energies, polarizabilities and damping constants of excitons are determined. It is shown that due to inter-exciton interactions the B and C excitons are strongly damped. It is estimated that the characteristic time of B to A relaxation is t_{BA}=1 ps. The exciton C lifetime is estimated τ_{C}=0.2 ps.

Keywords

EN

78.66.Fd; 71.36.+c

• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 5
• Pages: 867-869

Dates

published

1997-11

Contributors

author

K.P. Korona

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

author

R. Stępniewski

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

author

J.M. Baranowski

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland