Abstract
We analyze theoretically, the effect of temperature dependence on dielectric permittivity of nanocomposite of silver nanoparticle embedded in SiO2. The dielectric permittivity is calculated in accordance with the temperature-dependent plasma frequency of silver nanoparticle. We investigate this effect by changing the radii of spherical nanoparticle and the filling factor by incorporating the temperature-dependent volume expansion coefficient of nanoparticle. The width of the frequency range, in which the real part of the dielectric permittivity becomes negative, is studied. The variation of dielectric permittivity with frequency is also studied. The temperature-dependent plasma frequency is implemented in multilayer structures for tuning their optical properties, which is used for designing optical filters, sensors etc.
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Acknowledgments
Dr. K. S. Joseph Wilson and V. Revathy acknowledge the University Grants Commission, India, for the financial support of this work [Ref. No. F. 41-977/2012(SR)]. Authors sincerely thank Dr. K. Navaneethakrishnan, Head and Co-ordinator (Rtd.), School of Physics, Madurai Kamaraj University, for his support and guidance.
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Ramanujam, N.R., Wilson, K.S.J. & Revathy, V. Temperature dependence of optical parameters of a nanocomposite system. Indian J Phys 89, 1193–1197 (2015). https://doi.org/10.1007/s12648-015-0692-x
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DOI: https://doi.org/10.1007/s12648-015-0692-x