Stimulated absorption of light in bosonic cascades of excitons

In bosonic cascades of excitons or exciton-polaritons the absorption of electromagnetic radiation resonant to the energy spacing between neighboring quantization levels may be stimulated by the initial state occupation number. This opens way to realization of ultrasensitive detectors of infrared or terahertz radiation. The stimulated absorption of light by bosonic condensates has also a high potentiality for photovoltaic applications.