| Generation of 1.5 μm emission through an upconversion-mediated looping mechanism in Er<sup>3+</sup>/Sc<sup>3+</sup>-codoped LiNbO<sub>3</sub> single crystal. | |
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MedLine Citation:
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PMID: 22466217 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Important for telecommunications, luminescence of trivalent erbium (Er) at 1.5 μm generally arises from a Stokes-shifted downconversion mechanism. We show that this luminescence following direct excitation of the I<sub>11/2</sub>4 state is generated by upconversion-mediated looping process in Er<sup>3+</sup>/Sc<sup>3+</sup>-codoped LiNbO<sub>3</sub> single crystal. Emissions at 1.0 and 1.5 μm from the I<sub>11/2</sub>4 and I<sub>13/2</sub>4 states display linear and quadratic dependences on the excitation density in two separated ranges with a threshold of 20 W/cm<sup>2</sup>. This observation correlates with two- and four-photon processes in green and red upconversion emissions. The mechanism described has implications in the improvement of the output of 1.5 μm luminescence. |
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Authors:
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Guanying Chen; Liming Yang; Chao Xu; Shuwei Hao; Hailong Qiu; Liang Sun; Yuheng Xu; Chunhui Yang |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Optics letters Volume: 37 ISSN: 1539-4794 ISO Abbreviation: Opt Lett Publication Date: 2012 Apr |
Date Detail:
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Created Date: 2012-04-02 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7708433 Medline TA: Opt Lett Country: United States |
Other Details:
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Languages: eng Pagination: 1268-70 Citation Subset: IM |
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