Effect of subband nonparabolicity on optical properties of InSbAs/AlSb deep quantum well heterostructures

[摘要] Optical properties of heterostructures with deep quantum wells have been studied in the framework of four-band Kane mode permitting a nonparabolic energy spectrum of charge carriers to be taken into account. The system AlSb/InAs0.84Sb0.16/AlSb was used as an example. It is established that the nonparabolicity weakly influences the overlap integral between s- and p-states, but notably increase the state density and optical absorption coefficient in the conduction band.

[发布机构] Ioffe Institute, 26, Politekhnicheskaya St., St.-Petersburg; 194021, Russia^1

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Deep quantum well;Energy spectra;Non parabolicity;Optical absorption coefficients;Overlap integrals;State densities;Subbands