Sb-based type-II interband cascade laser on mismatched substrate for gas spectroscopy

The development of mid-infrared (2-6µm) lasers integrated on technological substrates, such as Si and GaAs, make them the best candidate for realization of low-power consumption and affordable optical gas sensors to monitor our environment within this wavelength range. We will discuss about our recent results on interband cascade lasers (ICL) emitting between 3 and 5µm (GaAs and Si) and the development of single mode distributed feedback ICL grown on different mismatched substrate.