Abstract
In this Letter, we report for the first time, to the best of our knowledge, a micron-sized mid-infrared laser based on a single microcrystal. Typical laser emissions centering at 4.24 μm are observed from a selected -doped ZnSe microcrystal under 2.94 μm excitation of Er:YAG laser at room temperature. The laser linewidth is , the pulse width is , and the lasing threshold is . The lasing wavelength is stable as the pump energy increases and is consistent with the strong absorption position of carbon dioxide in the atmosphere.
© 2018 Optical Society of America
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