Infrared Emission Properties of Ho doped KPb2Cl5

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dc.contributor.authorHömmerich, U
dc.contributor.authorOyebola, O
dc.contributor.authorBrown, E
dc.contributor.authorTrivedi, S.B
dc.contributor.authorBluiett, A.G
dc.contributor.authorZavada, J.M
dc.date.accessioned2016-08-01T10:07:41Z
dc.date.available2016-08-01T10:07:41Z
dc.date.issued2009-02-24
dc.descriptionTo access the full text of this article, kindly contact the University Librarian- Dr. Olukemi Fadehan via the administrators: Dr. Yetunde Zaid (yzaid@unilag.edu.ng) or Dr. Christopher Okiki (cokiki@unilag.edu.ng) of the University of Lagos Library.en_US
dc.description.abstractWe report on the optical properties of Ho doped KPb2Cl5 (Ho: KPC) for potential applications as an infrared (IR) solid-state gain medium. The investigated crystal was synthesized from commercial starting materials of PbCl2, KCl, and HoCl3 followed by several purification steps including directional freezing, zone-refinement, and chlorination. The Ho: KPC crystal was subsequently grown by Bridgman technique. Following optical excitation at 885 nm, several IR emission bands were observed at room-temperature with average wavelengths at 1.07, 1.18, 1.35, 1.65, 2.00, 2.89, and 3.96 mm. The emission at 3.96 mm originated from the 5I5 ® 5I6 transitions of Ho3+ and was further evaluated for possible applications in mid-IR lasers. The decay time of the 5I5 excited state was measured to be 5.0 ms at room-temperature. The long 5I5 lifetime is favorable for laser applications and indicates that non-radiative multi-phonon relaxations are small in Ho: KPC. Based on a Judd-Ofelt analysis, the emission quantum efficiency was determined to be near unity resulting in a peak emission cross-section of 0.62x10-20 cm2 at 3.96 mm. A drawback for laser applications is the long decay time of the lower 5I6 state with a value of 4.8 ms . Since the 3.96 mm transition terminates in the 5I6 level, its long lifetime will lead to population bottlenecking, which limits possible mid-IR lasing to pulsed and quasi-cw operation.en_US
dc.identifier.citationHömmerich, U. Et...al (2009) Infrared Emission Properties of Ho doped KPb2Cl5. Mater. Res. Soc. Symp. Proc. Vol. 1111en_US
dc.identifier.urihttp://dx.doi.org/10.1557/PROC-1111-D07-05
dc.identifier.urihttp://ir.unilag.edu.ng:8080/xmlui/handle/123456789/932
dc.language.isoenen_US
dc.publisherMaterials Research Societyen_US
dc.subjectLaseren_US
dc.subjectcrystal growthen_US
dc.subjectLuminescenceen_US
dc.titleInfrared Emission Properties of Ho doped KPb2Cl5en_US
dc.typeArticleen_US
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