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

Yu Song, Jens Sonntag, Sergey B. Mirov, Claire F. Gmachl, Jacob B. Khurgin

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish (US)
Article number141108
JournalApplied Physics Letters
Volume105
Issue number14
DOIs
StatePublished - Oct 6 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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