Tb<superscript>3+</superscript>-doped KPb<subscript>2</subscript>Br<subscript>5</subscript>: Low-energy phonon mid-infrared laser crystal.
In: Applied Physics Letters, Jg. 86 (2005-04-11), Heft 15, S. 151911-151913
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Zugriff:
Crystals of potassium lead bromide (KPB), a moisture-insensitive low-energy phonon laser host, were synthesized and purified. High-quality undoped and Tb3+-doped (nominal doping concentration was 5 mol % TbBr3) KPb2Br5 were grown by the vertical Bridgman technique. X-ray diffraction measurements indicated that, at room temperature, the material was monoclinic with space group P21/c, while at a high temperature the phase transformed to orthorhombic form. A reversible phase transition was observed around 256 °C upon the heating and cooling cycle from differential scanning calorimetric measurements. The material was found to be transparent in the broad range from ∼0.4 μm to 25 μm and above. The transmission spectrum of a Tb3+-doped crystal showed different absorption bands of Tb3+ at 4.5 μm, 3 μm, 2.3 μm, and 2 μm corresponding to 7F6–7Fα transitions, for α=2–5. The maximum phonon energy of undoped KPb2Br5 at room temperature was determined to be 134 cm-1 from Raman scattering spectrum. [ABSTRACT FROM AUTHOR]
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Tb<superscript>3+</superscript>-doped KPb<subscript>2</subscript>Br<subscript>5</subscript>: Low-energy phonon mid-infrared laser crystal.
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Autor/in / Beteiligte Person: | Roy, U. N. ; Hawrami, R. H. ; Cui, Y. ; Morgan, S. ; Burger, A. ; Mandal, Krishna C. ; Noblitt, Caleb C. ; Speakman, S. A. ; Rademaker, K. ; Payne, S. A. |
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Zeitschrift: | Applied Physics Letters, Jg. 86 (2005-04-11), Heft 15, S. 151911-151913 |
Veröffentlichung: | 2005 |
Medientyp: | academicJournal |
ISSN: | 0003-6951 (print) |
DOI: | 10.1063/1.1901815 |
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