Tuning of near-infrared-to-near-infrared luminescence from one-photon to two-photon anti-Stokes shift in Ca3Ga2-xCrxGe3O12via varying Cr3+content

Huihong Lin, Ting Yu, Gongxun Bai, Qinyuan Zhang, Jianhua Hao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)


Near-infrared-to-near-infrared (NIR-to-NIR) anti-Stokes luminescence from Cr3+singly doped Ca3Ga2Ge3O12(CGGG) occurs under the excitation of an 808 nm diode laser. The anti-Stokes processes vary from one photon to two photon, depending on the Cr3+content (x) in Ca3Ga2-xCrxGe3O12. The results suggest that phonon-assisted anti-Stokes excitation and cooperative energy transfer are involved in the observed upconversion (UC) processes of CGGG:Cr3+. The relevant Cr3+-doping-concentration-dependent NIR-to-NIR anti-Stokes luminescent mechanism, either one-photon or two-photon UC, is investigated. Such an observation on modulating the UC process via varying the doping concentration is helpful in broadening the understanding of UC phenomena.
Original languageEnglish
Pages (from-to)715-718
Number of pages4
JournalOptics Letters
Issue number4
Publication statusPublished - 15 Feb 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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