{"id":672,"date":"2026-02-04T15:17:16","date_gmt":"2026-02-04T15:17:16","guid":{"rendered":"https:\/\/wp.icmm.csic.es\/realm\/?p=672"},"modified":"2026-02-04T15:44:27","modified_gmt":"2026-02-04T15:44:27","slug":"tailoring-yb3-energy-levels-by-local-configuration-of-the-garnet-structure-the-case-of-ca3nbga%e2%96%a15o12-laser-single-crystal-a-model-for-ybyag","status":"publish","type":"post","link":"https:\/\/wp.icmm.csic.es\/realm\/2026\/02\/04\/tailoring-yb3-energy-levels-by-local-configuration-of-the-garnet-structure-the-case-of-ca3nbga%e2%96%a15o12-laser-single-crystal-a-model-for-ybyag\/","title":{"rendered":"Tailoring Yb3+ energy levels by local configuration of the garnet structure. The case of Ca3(NbGa\u25a1)5O12 laser single crystal, a model for Yb:YAG"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-523\" src=\"https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2023\/04\/logos-NextGeneration-300x66.png\" alt=\"\" width=\"300\" height=\"66\" srcset=\"https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2023\/04\/logos-NextGeneration-300x66.png 300w, https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2023\/04\/logos-NextGeneration.png 563w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-674\" src=\"https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/FigSI1a-300x227.jpg\" alt=\"\" width=\"300\" height=\"227\" srcset=\"https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/FigSI1a-300x227.jpg 300w, https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/FigSI1a-768x581.jpg 768w, https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/FigSI1a.jpg 840w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/> The cationic charge increase on the tetrahedral garnet site shifts the ytterbium level energy towards higher values.<\/p>\n<p>Crystallographic information on the cationic interactions that may broaden the Yb<sup>3+<\/sup> optical ba<span style=\"font-size: 1rem\">nds in garnets for sustaining shorter femtosecond laser pulses is provided. It is shown that the energy of the Yb<\/span><sup>3+<\/sup> <sup>2<\/sup><span style=\"font-size: 1rem\">F<\/span><sub>7\/2<\/sub><span style=\"font-size: 1rem\">(0)\u2194<\/span><sup>2<\/sup><span style=\"font-size: 1rem\">F<\/span><sub>5\/2<\/sub><span style=\"font-size: 1rem\">(0\u00b4) \u00a0optical absorption (0\u21940\u00b4 OA) measured at a cryogenic temperature (T= 6 K) in Ca<\/span><sub>3<\/sub><span style=\"font-size: 1rem\">(NbGa\u25a1)<\/span><sub>5<\/sub><span style=\"font-size: 1rem\">O<\/span><sub>12<\/sub><span style=\"font-size: 1rem\"> (CNGG) type disordered single crystal garnets is sensitive to the electric charge of cations incorporated in the 24<\/span><em style=\"font-size: 1rem\">d<\/em><span style=\"font-size: 1rem\"> tetrahedral site while very little sensitive to the substitutions made on the 16<\/span><em style=\"font-size: 1rem\">a<\/em><span style=\"font-size: 1rem\"> octahedral one.<\/span><\/p>\n<p>Li<sup>+<\/sup> and Ge<sup>4+<\/sup> fill exclusively tetrahedral garnet site with a strong reduction of the cationic vacancy density monitored in the Li case by positron annihilation lifetime sp<span style=\"font-size: 1rem\">ectroscopy (PALS). Ti<\/span><sup>4+<\/sup><span style=\"font-size: 1rem\"> sits exclusively in the octahedral garnet site with no effect on the crystal cationic vacancy density, while Mg<\/span><sup>2+<\/sup><span style=\"font-size: 1rem\"> is distributed in the three garnet sites with preference for the tetrahedral one and a moderate reduction of the crystal vacancy den<\/span><span style=\"font-size: 1rem\">sity.<\/span><\/p>\n<p>Yb<sup>3+<\/sup> 0\u21940\u00b4 OA bands observed at \u03bb = 973 nm, 971.9 nm, 971.3 nm, 971.1 nm and 969.6 nm are correlated with the presence in the nearest to Yb<sup>3+<\/sup> tetrahedral garnet sites of a vacancy (electric charge Q=0), Li<sup>+<\/sup>, Mg<sup>2+<\/sup>, Ga<sup>3+<\/sup> and Ge<sup>4+<\/sup>, respectively. However, the incorporation of Ti<sup>4+<\/sup> in the octahedral site substituting mainly Ga<sup>3+<\/sup> has not observable effect on the Yb<sup>3+<\/sup> 0\u21940\u00b4 OA.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-670\" style=\"font-size: 1rem\" src=\"https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/Abstract-Grafico600dpi-300x158.jpg\" alt=\"\" width=\"300\" height=\"158\" srcset=\"https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/Abstract-Grafico600dpi-300x158.jpg 300w, https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/Abstract-Grafico600dpi-1024x539.jpg 1024w, https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/Abstract-Grafico600dpi-768x404.jpg 768w, https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/Abstract-Grafico600dpi-1536x808.jpg 1536w, https:\/\/wp.icmm.csic.es\/realm\/wp-content\/uploads\/sites\/28\/2026\/02\/Abstract-Grafico600dpi.jpg 1949w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The cationic charge increase on the tetrahedral garnet site shifts the ytterbium level energy towards higher values. Crystallographic information on the cationic interactions that may broaden the Yb3+ optical bands in garnets for sustaining shorter femtosecond laser pulses is provided. It is shown that the energy of the Yb3+ 2F7\/2(0)\u21942F5\/2(0\u00b4) \u00a0optical absorption (0\u21940\u00b4 OA) measured &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/wp.icmm.csic.es\/realm\/2026\/02\/04\/tailoring-yb3-energy-levels-by-local-configuration-of-the-garnet-structure-the-case-of-ca3nbga%e2%96%a15o12-laser-single-crystal-a-model-for-ybyag\/\" class=\"more-link\">Continuar leyendo<span class=\"screen-reader-text\"> \u00abTailoring Yb3+ energy levels by local configuration of the garnet structure. The case of Ca3(NbGa\u25a1)5O12 laser single crystal, a model for Yb:YAG\u00bb<\/span><\/a><\/p>\n","protected":false},"author":51,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-672","post","type-post","status-publish","format-standard","hentry","category-sin-categoria"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/posts\/672","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/users\/51"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/comments?post=672"}],"version-history":[{"count":9,"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/posts\/672\/revisions"}],"predecessor-version":[{"id":685,"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/posts\/672\/revisions\/685"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/media?parent=672"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/categories?post=672"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/realm\/wp-json\/wp\/v2\/tags?post=672"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}