Abstract In this study, Cr doped hexagonal CuGaO2 (CGO) nanoplates (NPs) are fabricated successfully. It is worth noting that an emission band located at approximately 700 nm has been found in the photoluminescence (PL) spectrum of CuGa 1−x Cr x O2 NPs, which can be ascribed to the deep levels emission caused by the Cr 3d and 4s states. Moreover, six resonance peaks also appear in the PL spectrum, which prove that resonance is formed in CGO NPs cavity. The resonant process and resonance mode were investigated in experiment and theory. As the consequence, mode spacing is approximately 8.5 nm and the mode numbers are 60, 59, 58, 57, 56 and 55 corresponding to the peaks of 691 nm, 699 nm, 707 nm, 715 nm, 723 nm and 731 nm in the PL spectrum. The finite difference time domain (FDTD) solution is also used to study resonance mechanism of CGO NPs. These results reveal that the mode calculations and FDTD simulations well agree with the experimental data. The present work further improves the potential applications of CuGa 1−x Cr x O2 NPs in the field of optoelectronic devices.

中文翻译：

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Cr掺杂CuGaO2纳米片的光致发光特性和回音壁模式共振研究

摘要 在本研究中，成功​​制备了 Cr 掺杂的六方 CuGaO2 (CGO) 纳米片 (NPs)。值得注意的是，在 CuGa 1−x Cr x O2 NPs 的光致发光 (PL) 光谱中发现了位于大约 700 nm 处的发射带，这可以归因于 Cr 3d 和 4s 态引起的深能级发射. 此外，PL光谱中还出现了六个共振峰，证明共振是在CGO NPs腔中形成的。对共振过程和共振模式进行了实验和理论研究。因此，模式间距约为 8.5 nm，模式编号为 60、59、58、57、56 和 55，对应于 691 nm、699 nm、707 nm、715 nm、723 nm 和 731 nm 的峰值。 PL 谱。时域有限差分 (FDTD) 解也用于研究 CGO NPs 的共振机制。这些结果表明模态计算和 FDTD 模拟与实验数据非常吻合。目前的工作进一步提高了 CuGa 1-x Cr x O2 NPs 在光电器件领域的潜在应用。