An optical setup is specially developed to explore the basic optical properties of quantum wells and other quantum structures. The optical scheme, basically a cross double beam reflectometer, is based on a spectrograph equipped with a linear photodiode array. This arrangement allows an almost simultaneous record of the most relevant spectroscopic features using different techniques like reflectance, photoluminescence, and photoreflectance. Because of unneeded grating repositioning, a direct comparison of absolute positions for structures of spectra taken with different techniques can be made within instrument resolution (Delta E approximate to 0.15 meV @ 800 nm). Successful results by the use of this apparatus for GaAs/InGaAs and AlGaAs/GaAs samples are documented.
Experimental multi-techniques apparatus for optical properties of quantum structures
Ferrari L;Selci S
1995
Abstract
An optical setup is specially developed to explore the basic optical properties of quantum wells and other quantum structures. The optical scheme, basically a cross double beam reflectometer, is based on a spectrograph equipped with a linear photodiode array. This arrangement allows an almost simultaneous record of the most relevant spectroscopic features using different techniques like reflectance, photoluminescence, and photoreflectance. Because of unneeded grating repositioning, a direct comparison of absolute positions for structures of spectra taken with different techniques can be made within instrument resolution (Delta E approximate to 0.15 meV @ 800 nm). Successful results by the use of this apparatus for GaAs/InGaAs and AlGaAs/GaAs samples are documented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
