Photomodulation spectroscopy applied to low-dimensional semiconductor structures
We present here few examples of application of photomodulation techniques, e.g. photoreflectance and phototransmittance, as excellent methods for the investigation of semiconductor device structures. The discussion is narrowed down to low-dimensional structures used as an active part of the infrared optoelectronic devices: from new material (GaInAsN) double quantum wells, good candidate for 1.3 and 1.55 ?m telecommunication lasers, through InGaSb/GaSb quantum wells pretending to the application in the infrared gas sensors, to 980 nm InGaAs/GaAs quantum dot laser pump source for EDFA amplifiers.
photomodulation quantum wells quantum dots