PbSe/PbSrSe is a promising lead salts material system that can be utilized in several near infrared applications. This material system has normal and degenerate oblique valleys with different effective masses and emission wavelengths. In this work, we investigate the confinement factor, maximum gain, modal gain and threshold current density for both the valleys at 200K using modified multiple quantum well structure. It was found that both the valleys have indistinguishable gain and threshold current density values, and the only effect of degeneracy is the emission wavelength. Also, it was concluded that the current density values are high and this could be due to thermionic leakage current across the barrier.

confinement factor, modal gain, threshold current, degeneracy, lead salts, mid-infrared.