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Purification, material synthesis, and infrared emission from Nd doped PbBr2 and PbI2

Published online by Cambridge University Press:  01 February 2011

Uwe Hömmerich ,
Ei Ei Nyein ,
Sudhir B. Trivedi ,
Althea B. Bluiett  and
John M. Zavada
Uwe Hömmerich
Affiliation:
uwe.hommerich@hamptonu.edu, Hampton University, Physics, OLIN Engineering Bldg., Hampton, VA, 23668, United States, 757-727-5829, 757-728-6910
Ei Ei Nyein
Affiliation:
einyein@cox.net, Hampton University, Physics, United States
Sudhir B. Trivedi
Affiliation:
strivedi@brimrose.com, Brimrose Corporation of America, United States
Althea B. Bluiett
Affiliation:
agbluiett@yahoo.com, Elizabeth City State University, Chemistry and Physics, United States
John M. Zavada
Affiliation:
john.zavada@us.army.mil, US Army Research Office, United States
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Abstract

We report on the material synthesis and infrared optical properties of Nd doped lead bromide (PbBr2) and lead iodide (PbI2) bulk crystals. Commercial PbBr2 and PbI2 materials were purified through repeated solidification and horizontal zone refinement. After purification, Nd doped lead halides were synthesized and grown by Bridgman technique. Under optical excitation, Nd:PbBr2 samples exhibited several near-infrared emission bands centered at 816 nm, 891 nm, 963 nm, 1069 nm, 1183 nm, 1356 nm, and 1535 nm. The emission from Nd:PbI2 samples was similar to that of from Nd:PbBr2, but slightly shifted to longer wavelengths. The observation of 1540 nm emission from Nd3+ ions is unusual and reflects on the small non-radiative decay rates in the investigated halides. Lead halides have low maximum phonon energies, which reduces non-radiative decay due to multi-phonon relaxations. In contrast to Nd:YAG, Nd:PbBr2 and Nd:PbI2 exhibited efficient emission from the 4F5/2, 2H9/2 excited states, which are located only ∼1000cm−1 above the 4F3/2 level of Nd3+. Under 808 nm diode pumping, both samples also exhibited broad mid-infrared emission bands centered at ∼5.1 μm.

Keywords

Ndoptical propertieslaser
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 891: Symposium EE – Progress in Semiconductor Materials V – Novel Materials and Electronics and Optoelectronic Applications , 2005 , 0891-EE03-12
Copyright
Copyright © Materials Research Society 2006

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References

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