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篇目详细内容 |
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【篇名】 |
Modifying optical properties of ZnO nanowires via strain-gradient |
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【刊名】 |
Frontiers of Physics |
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【刊名缩写】 |
Front. Phys |
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【ISSN】 |
2095-0462 |
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【EISSN】 |
2095-0470 |
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【DOI】 |
10.1007/s11467-013-0386-9 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2013 |
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【卷期】 |
8
卷5期 |
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【页码】 |
509-515
页,共
7
页 |
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【作者】 |
Xue-;
Wen Fu;
Qiang Fu;
Liang-;
Zhi Kou;
Xin-;
Li Zhu;
Rui Zhu;
Jun Xu;
Zhi-;
Min Liao;
Qing Zhao;
Wan-;
Lin Guo;
Da-;
Peng Yu;
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【关键词】 |
strain-gradient; ZnO nanowire; cathodoluminescene; exciton energy; energy bands |
【摘要】 |
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We conduct systematical cathodoluminescence study on red-shift of near-band-edge emission energy in elastic bent ZnO nanowires with diameters within the exciton diffusion length (～ 200 nm) in liquid nitrogen temperature (81 K). By charactering the emission spectra of the nanowires with different local curvatures, we find a linear relationship between strain-gradient and the red-shift of near-band-edge emission photon energy, an elastic strain-gradient effect in semiconductor similar to the famous flexoelectric effect in liquid crystals. Our results provide a new route to understand the inhomogeneous strain effect on the energy bands and optical properties of semiconductors and should be useful for designing advanced nano-optoelectronic devices. |
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