Quantum-cascade lasers of 8-9 μm spectral range

We present the results on epitaxy growth of heterostructures for quantum cascade laser within 7-9 micrometer spectral range. Structural quality of grown heterostructures was studied by X-ray diffractometry and transmission electron microscopy. The lasers demonstrated lasing with wavelength of 8 μm at room temperature and of 9.6 μm at 140 K.