• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Luminescence and local photonic confinement of single ZnSe:Mn nanostructure and the shape dependent lasing behavior
【24h】

Luminescence and local photonic confinement of single ZnSe:Mn nanostructure and the shape dependent lasing behavior

机译：单个ZnSe：Mn纳米结构的发光和局域光子约束以及形状依赖的激光行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

One-dimensional Mn-ZnSe nanostructures with high crystallite quality were synthesized by the CVD method. Transmission electron microscopy was used to study the defect state, crystal lattice and growth direction of as-prepared nanostructures. Raman spectra under varied excitation wavelengths confirmed the dopant modes of Mn(II) and the inhomogeneity. The micro-photoluminescence (PL) spectra of individual nanostructures under CW laser excitation with different powers showed the dominant trapped state emission with periodic multi-peaks. The selected peak mapping indicated that there were many integrated Fabry-Perot cavities and whispering gallery mode cavities within the nanowiresanoneedles and nanobelts, respectively, which can be accounted for by inhomogeneous optical phases in the Mn-ZnSe nanostructure. The phase may be introduced by both Mn doping and structural relaxation. The micro-PL spectra under nanosecond pulse laser excitation produce low threshold lasing lines near the band edge of Mn-ZnSe nanostructures. The lasing occurs due to the dominant interaction between bound excitons at high density, evidenced by its appearance close to the LO phonon replica. The belts show much stronger lasing emission due to larger 2D coherent space than the wires due to the inhomogeneity induced by the doping process. The different optical behavior with changing excitation pulses may find applications in future photonic devices of II-VI nanostructures.
机译：通过CVD法合成了具有较高微晶质量的一维Mn-ZnSe纳米结构。用透射电子显微镜研究了所制备纳米结构的缺陷状态，晶格和生长方向。在不同激发波长下的拉曼光谱证实了Mn（II）的掺杂模式和不均匀性。在不同功率的连续波激光激发下，单个纳米结构的微光致发光（PL）光谱显示具有周期性多峰的主要捕获态发射。选定的峰图表明，在纳米线/纳米针和纳米带中分别存在许多集成的Fabry-Perot腔和耳语的画廊模式腔，这可以由Mn-ZnSe纳米结构中不均匀的光学相来解释。可以通过Mn掺杂和结构弛豫两者引入相。纳秒脉冲激光激发下的微PL光谱在Mn-ZnSe纳米结构的能带边缘附近产生低阈值激光线。激射的发生是由于高密度键合激子之间的显性相互作用，其外观接近LO声子副本。由于掺杂工艺引起的不均匀性，由于2D相干空间更大，因此带束显示出比金属丝更强的激光发射。随着激发脉冲的变化，不同的光学行为可能会在未来的II-VI纳米结构光子器件中得到应用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号