Lasers for Linear and Non-Linear Spectroscopy of Semiconductor Heterostructures and Nanostructures

摘要

A model FlRL-1OO far infrared laser system was purchased from Edinburgh Instruments. The FIR laser was installed and tested. In addition, three related experiments were carried out using the new apparatus in order to evaluate the performance under laboratory conditions. These experiments are: A. FIR absorption from an n-type modulation doped GaAs/AlGaAs quantum well structure. The electron cyclotron resonance was recorded for a number of laser lines. B. FIR absorption from an n-type modulation doped lnGaAs/InAIAs quantum well structure. The effective mass of the confined electrons was determined. C. Photoluminescence based Optically detected Resonance (PLODR) from an undoped CdMnTe/CdMgTe quantum well structure. In this experiment the excitonic photoluminescence intensity was modulated by the FIR laser. Both electron and hole cyclotron resonances were observed.