Mid-infrared light emission from a Fe{sup 2+}:ZnSe polycrystal using quantum cascade laser pumping
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08540 (United States)
- Department of Physics, University of Alabama at Birmingham, 421 Campbell Hall, 1300 University Blvd., Birmingham, Alabama 35294 (United States)
- Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland 21218 (United States)
We report the realization of light emission from a Fe{sup 2+} doped ZnSe polycrystal with efficient pumping from a quantum cascade (QC) laser. The QC laser photon energy is near the absorption edge of the Fe{sup 2+}:ZnSe with less than ∼60 meV Stokes' shift. The Fe{sup 2+}:ZnSe polycrystal shows an absorption band of ∼2.2 – 5 μm in the mid-infrared (mid-IR) at room temperature, which narrows down to ∼2.4–4.2 μm at 80 K. Clear photoluminescence (PL) from 4.5 μm to 6 μm are observed throughout the temperature range of 300 K to 80 K. At room temperature, the luminescence lifetime is about 0.38 ± 0.1 μs which increases up to 101 ± 2 μs at 118 K. This system transfers energy stored in the upper state of a QC laser with ∼ps lifetime to the Fe{sup 2+}:ZnSe with 10{sup 5} to 10{sup 8} times longer lifetime, at the cost of minute photon energy losses.
- OSTI ID:
- 22350843
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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