Department of Physics
Dr. Sergey Mirov,, 934-8088

Semiconductor lasers feature narrow amplification bandwidth which limits their application in spectroscopy. We are trying to solve this problem by making them lase on the impurity transitions rather than on transitions between the conduction and valence bands. We propose electrically pumped Cr and Fe doped ZnSe quantum dot broadly tunable middle-infrared lasers.
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Nano-dot Heterojunction laser Cr nanoparticles imbedded in ZnSe nano-dot active region effectively convert energy accumulated  by carriers in nano-dots into middle-infrared laser radiation