Quantum Wire with Triangle Cross Section： Optical Properties

In the present work, the optical properties of a GaAs quantum wire with equilateral triangle cross section are studied. For this purpose, we use analytical expressions for optical properties obtained by the compact-density matrix formalism. Here, we investigate the intersubband optical absorption coefficients and refractive index changes as a function of the triangle side （L） and the incident optical intensity （I）. According to the obtained results, it is found that： （i） The total refractive index changes increase and shift towards lower energies when the triangle side increases. （ii） The total absorption coefficient decreases as the triangle side increases. Also, the resonance peak shifts towards lower energies by increasing the triangle side.