| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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The Third-Order Nonlinear Optical Properties in Cobalt-Doped ZnO Films |
| YAN Teng-Fei1, LI Ying1, KANG Jun-Jie1, ZHOU Peng-Yu1, SUN Bao-Quan1, ZHANG Kun2, YAN Shi-Shen2, ZHANG Xin-Hui1** |
1State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
2School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100
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| Cite this article: |
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YAN Teng-Fei, LI Ying, KANG Jun-Jie et al 2015 Chin. Phys. Lett. 32 077801 |
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Abstract We quantitatively investigate the third-order optical nonlinear response of Co-doped ZnO thin films prepared by magnetron sputtering using the Z-scan method. The two-photon absorption and optical Kerr effect are revealed to contribute to the third-order nonlinear response of the Co-doped ZnO films. The nonlinear absorption coefficient β is determined to be approximately 8.8×10?5 cm/W and the third-order nonlinear susceptibility χ(3) is 2.93×10?6 esu. The defect-associated energy levels within the band gap are suggested to be responsible for the enhanced nonlinear response observed in Co-doped ZnO films.
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Received: 20 April 2015
Published: 30 July 2015
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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78.20.Mg
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(Photorefractive effects)
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