| Original Articles |
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Optical Parameters and Absorption of Azo Dye and Its Metal-Substituted Compound Thin Films |
| WEI Bin;WU Yi-Qun;GU Dong-Hong;GAN Fu-Xi |
| Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, PO Box 800-211, Shanghai 201800 |
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| Cite this article: |
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WEI Bin, WU Yi-Qun, GU Dong-Hong et al 2003 Chin. Phys. Lett. 20 1596-1599 |
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Abstract We determine the complex refractive indexes N(N = n-ik), dielectric constants ε(ε = ε1 - iε2), and absorption coefficients α of a new azo dye [2-(6-methyl-2-benzothiazolyazo)-5-diethylaminophenol(MBADP)]-doped polymer and its nickel- and zinc-substituted compounds(Ni-MBADP and Zn-MBADP) spin-coated thin films from an scanning ellipsometer in the wavelength 400-700 nm region. Metal chelation strongly (about one times) enhances the optical and dielectric parameters at the peaks and results in a large bathochromic shift (50-60 nm) of absorption band. Bathochromic shift of Ni-MBADP is about 10 nm larger than that of Zn-MBADP due to different spatial configurations formed in the metal-azo complexes.
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| Keywords:
78.20.Ci
78.66.Qn
42.70.Nq
42.70.Ln
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Published: 01 September 2003
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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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78.66.Qn
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(Polymers; organic compounds)
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42.70.Nq
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(Other nonlinear optical materials; photorefractive and semiconductor materials)
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42.70.Ln
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(Holographic recording materials; optical storage media)
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