Mid-infrared light emission from a Fe2+:ZnSe polycrystal using quantum cascade laser pumping

Academic Article


  • We report the realization of light emission from a Fe2+ doped ZnSe polycrystal with efficient pumping from a quantum cascade (QC) laser. The QC laser photon energy is near the absorption edge of the Fe2+:ZnSe with less than ∼60 meV Stokes' shift. The Fe2+: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 Fe2+:ZnSe with 105 to 108 times longer lifetime, at the cost of minute photon energy losses.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Song Y; Sonntag J; Mirov SB; Gmachl CF; Khurgin JB
  • Volume

  • 105
  • Issue

  • 14