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IR Absorption

Crystal-Field Engineering of Transition Metal Doped Chalcogenide Laser Materials Uwe Hömmerich, Hampton University, DMR-0301951. Luminescent Materials Development for the 3-5 µm spectral region based on Co 2+ doped binary and ternary II-VI materials. IR Absorption. Mid-IR Emission.

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IR Absorption

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  1. Crystal-Field Engineering of Transition Metal Doped Chalcogenide Laser MaterialsUwe Hömmerich, Hampton University, DMR-0301951 Luminescent Materials Development for the 3-5 µm spectral region based on Co2+ doped binary and ternary II-VI materials. IR Absorption Mid-IR Emission The IR optical properties of Co2+ doped II-VI materials were investigated for applications in optoelectronics and lasers. Mid-IR emission bands in the 3-5 µm region were observed from several Co2+ doped binary and ternary II-VI semiconductors at room temperature. The 3-5 m range is of great interest for remote sensing of atmospheric constituents (e.g. CO2) and pollutants, bio-chemical detection, and IR countermeasures. The peak position of the mid-IR emission from Co2+ was compositional “tuned” through changes in the host material. The spectral changes reflect on the crystal-field strength experienced by Co2+ ions in II-VI hosts.

  2. Crystal-Field Engineering of Transition Metal Doped Chalcogenide Laser MaterialsUwe Hömmerich, Hampton University, DMR-0301951 Ivy K. Jones (physics grad. student, M.S.) Ivy continued her studies on the diffusion doping and optical spectroscopy of Cr doped II-VI materials. Ivy presented her research at the 2005 MRS spring meeting and 2005 APS meeting. In addition, Ivy gave a presentation at the 2005 National Conference of Black Physics Students. EDUCATION & OUTREACH: Graduate Level: Ivy Krystal Jones (Physics, M.S. program) Peter Amedzake (Physics, Ph.D. program) Undergraduate Level: Gigi Frey (Biology, sophomore) Natasha Ferguson (Chemistry, sophomore) Howard Brown (Computer Science, junior) (Thomas Nelson Community College) IR Laser Materials Development Group at H.U. A program in education and research training in IR laser materials development is being offered at H.U. The training includes the material synthesis, optical spectroscopy, modeling, and laser performance testing. Recent project activities will be presented at the 2005 Summer Meeting of the American Association of Physics Teachers. Outreach activities include mentoring in summer programs and science demos for students from local high schools. From left: EiEi Nyein, P. Amedzake. I.K. Jones, U. Hommerich

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