3 research outputs found
Linearna i nelinearna optiÄka svojstva modulirane kvantne jame
The electron energy levels and envelope wave functions in a double confinement quantum-barrier structure, are numerically calculated utilizing the transfer matrix method. Analytic forms of the linear and the nonlinear optical absorption coefficients and change in refractive indices due to intersubband optical transitions with an applied electric field are derived theoretically based on the density-matrix formalism.Za konaÄno duboku kvantnu jamu odreÄeni su numeriÄki energetski nivoi elektrona i valne funkcije primjenom metode matrice prijelaza. NaÄen je analitiÄki oblik za koeficijente linearne i nelinearne optiÄke apsorpcije te za promjenu indeksa loma zbog optiÄkih prijelaza medu podvrpcama uzrokovanih vanjskim elektriÄnim poljem. RaÄun je napravljen pomoÄu formalizma matrice gustoÄe