ABSTRACT
There is a wide variety of methods such as absorption and reflectivity, photoluminescence, Faraday and magnetooptical Kerr effects, and Raman scattering. This chapter discusses the application of these methods to the investigation of interband transitions, cyclotron and spin resonances in epitaxial films of different IV-VI compounds, binaries, nondiluted and diluted magnetic alloys, and low-dimensional systems. IV-VI compound heterostructures are of interest for the fabrication of tunable diode lasers in the mid-infrared range and, consequently, their optical properties must be properly analyzed. IV-VI semiconductors are attractive materials for optoelectronic applications in the mid-infrared range. The resonant magnetic fields of interband transitions can be obtained from such recordings by taking the minima of the negative first derivative of the experimental traces. Magnetotransmission and reflectivity measurements were performed both with far-infrared lasers and with Fourier transform spectroscopy in high magnetic fields at liquid helium temperatures.
