The Linewidth Enhancement Factor of Dilute Nitride Intersubband Lasers Without Inversion

摘要

The linewidth enhancement (a factor) due to fluctuations in the refractive index induced by carrier fluctuations of intersubband lasers was initially expected to be zero. However, values ranging from -0.5 to 3 have been found experimentally. For laser without inversion conditions, which have potential for the high temperature operation of terahertz lasers, a is found to be larger, but still at the same order of magnitude of conventional inverted medium lasers and this paper further investigates this case for dilute nitride quantum well structures.