Crystal growth, spectral properties and crystal field analysis of Cr3+:MgWO4

Abstract

Cr³⁺ ion doped MgWO₄ crystal with dimensions of 3 × 3 × 20 mm³ has been grown for the first time. The Cr³⁺:MgWO₄ crystal showed strong absorption in the visible range and strong emission in the near-infrared range. The absorption and emission cross section of this crystal are 8.86 × 10⁻²⁰ cm² and 41 × 10⁻²⁰ cm² at 740 nm and 993.6 nm, respectively. Energy transfer procedure between Cr³⁺ ion and the defect center in the host crystal has been demonstrated. The crystal field, electron-vibration coupling and energy levels of the Cr³⁺:MgWO₄ crystal are discussed.