28 June 2015 to 3 July 2015
Africa/Johannesburg timezone
SAIP2015 Proceeding published on 17 July 2016

Fano-like scattering in nanocomposites

2 Jul 2015, 16:30
20m
Oral Presentation Track G - Theoretical and Computational Physics TCP

Speaker

Mr Leta T. Jule Leta T. Jule (Addis Ababa University)

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

MSc

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

In this study, the scattering properties of metal/dielectric composites in active host matrices are studied theoretically. We have calculated the effective polarization for spherical nanocomposites and silver plasma frequency (z) to realize the appearance of Fano in the nanocomposites. It is shown that Fano resonances appear as the result of effective polarizability (α^'') of the inclusions. The negative value of the active host matrices reduce absorption and provide the conditions for Fano resonances. The analysis of the scattering cross-section for spherical inclusion with frequency dependent dielectric function of the core of the incident plane wave shows two resonances as the external field is enhanced. The presence of Fano-like resonances for spherical inclusions depends strongly on the effective polarizability of the inclusion. However we have carried out calculations under long wave approximation, in future we need to carry out experiment for our model to observe the spectra's for different nanocomposites.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes

Main supervisor (name and email)<br>and his / her institution

Dejene BF

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Primary author

Mr Leta T. Jule Leta T. Jule (Addis Ababa University)

Co-authors

Dr Belayneh Mesfin (Addis Ababa University) Prof. Francis Dejene (University of the Free State) Dr Kittesa Roro3 Kittesa Roro3 (R&D CORE (Energy Initiatives), CSIR) Dr Teshome Senbeta (Addis Ababa University) Dr V. N. Mal’nev (Addis Ababa University)

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