Abstract It was shown, that Cu-doped hexagonal phases YGaO3, YInO3 and GdInO3 possess an intense broadband photoluminescence in the near infrared region. This photoluminescence is attributed to the unique crystalline lattice of studied hexagonal phases with trigonal-bipyramidal coordinated Ga3+ and In3+ ions. It was suggested that an emissive center in these phases is formed by heterovalent substitution of Ga3+ and In3+ for Cu2+. The energy level diagram of Cu2+ in trigonal-bipyramidal coordination offer some benefits for possible application of this impurity ion as an active center in broadband optical amplifiers and tunable lasers.

中文翻译：

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YGaO3、YInO3和GdInO3六方相中三角-双锥配位Cu2+杂质中心的宽带近红外光致发光

摘要 结果表明，掺杂Cu的六方相YGaO3、YInO3和GdInO3在近红外区具有强烈的宽带光致发​​光。这种光致发光归因于所研究的六方相的独特晶格与三角-双锥体配位的 Ga3+ 和 In3+ 离子。有人提出这些相中的发射中心是由 Ga3+ 和 In3+ 对 Cu2+ 的异价取代形成的。Cu2+ 在三角-双锥配位中的能级图为这种杂质离子在宽带光放大器和可调谐激光器中作为活性中心的可能应用提供了一些好处。