Nonlinear optical properties of laser deposited CuO thin films |
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Authors: | Aiping Chen Hua Long |
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Affiliation: | Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract: | In this work we investigate the third-order optical nonlinearities in CuO films by Z-scan method using a femtosecond laser (800 nm, 50 fs, 200 Hz). Single-phase CuO thin films have been obtained using pulsed laser deposition technique. The structure properties, surface image, optical transmittance and reflectance of the films were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and UV-vis spectroscopy. The Z-scan results show that laser-deposited CuO films exhibit large nonlinear refractive coefficient, n2 = − 3.96 × 10− 17 m2/W, and nonlinear absorption coefficient, β = − 1.69 × 10− 10 m/W, respectively. |
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Keywords: | 78.20.-e 81.15.Fg 42.65.-k |
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