Metastable CdSe/MgSe quantum wells prepared by MBE with near IR intersubband absorption

Abstract

The authors report, for the first time, the growth of a metastable CdSe/MgSe quantum well structure by molecular beam epitaxy. The structure was grown on InP substrate with thin ZnCdSe and InGaAs buffers. To maintain the zincblende structure of MgSe (which naturally favors rocksalt structure), a ZnCdSe spacer layer was inserted between CdSe/MgSe quantum wells. The structural and optical properties of the sample were characterized by high-resolution x-ray diffraction and photoluminescence measurements. Intersubband transitions in the near infrared region were observed.

Second harmonic generation in asymmetric MgSe/CdSe/ZnCdMgSe quantum well structures

“…In recent years, the group II–VI selenide quantum well structures have been investigated for several applications such as quantum cascade structures , short wavelength quantum well infrared photodetector , yellow laser diodes , and yellow emitters . Among the others, MgSe/CdSe/ZnCdMgSe quantum well structures have been suggested as an alternative to existing systems for applications in the optical communication wavelength 1.55m .…”