Wavelength tuning in GaAs/AlGaAs quantum wells by InAs submonolayer insertion

Z Y Xu, J Wang, Y Wang, W K Ge, Qing Li, S S Li, M Henini
1999 Journal of Physics: Condensed Matter  
Wavelength tuning of exciton emissions has been achieved simply by inserting an InAs submonolayer at the centre of GaAs quantum wells during molecular beam epitaxy growth. Photoluminescence measurements show that the emission energy can be effectively tuned from the quantum-well-determined energy down to less than the band gap of GaAs, depending on the well width as well as the InAs layer thickness. Using the effective-mass approximation, the tuning effect can be well predicted theoretically.
more » ... e results reported here may provide an alternative way to tune the wavelength in optoelectronic devices.
doi:10.1088/0953-8984/11/17/320 fatcat:y6a3sopkl5fw7gew7om3kcwa6y