Mid-IR photoluminescence of Fe^2+ and Cr^2+ ions in ZnSe crystal under excitation in charge transfer bands | Zendy

Jeremy Peppers | Zendy; Vladimir Fedorov | Zendy; Sergey Mirov | Zendy

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Mid-IR photoluminescence of Fe^2+ and Cr^2+ ions in ZnSe crystal under excitation in charge transfer bands

Author(s) -

Jeremy Peppers,

Vladimir Fedorov,

Sergey Mirov

Publication year - 2015

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.004406

Subject(s) - photoluminescence , lasing threshold , materials science , ion , excitation , crystal (programming language) , photoluminescence excitation , metastability , laser , relaxation (psychology) , atomic physics , analytical chemistry (journal) , optics , wavelength , optoelectronics , chemistry , physics , psychology , social psychology , organic chemistry , quantum mechanics , computer science , programming language , chromatography

Spectroscopic characterization of Fe:ZnSe(Cr:ZnSe) crystals under visible excitation into the charge transfer bands of Transition Metal ions were studied. The excitation efficiencies of mid-IR photoluminescence between (5)T(2)((5)E) and (5)E((5)T(2)) states via direct relaxation to the upper laser levels and via metastable upper (3)T(1) were investigated. It was demonstrated that the latter route is the dominant process for Cr(2+) ions and could provide sufficient pump rate for mid-IR lasing. The pump efficiencies via direct relaxation to the upper laser levels were estimated to be <2% for both ions under 532 nm excitation wavelength.

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