Polarimetric techniques for determining morphology and optical features of high refractive index dielectric nanoparticle size

Ángela I. Barreda; Juan M. Sanz; Rodrigo Alcaraz de la Osa; José M. Saiz; Fernando Moreno; Francisco González

doi:10.1117/12.2229488

14 March 2016 Polarimetric techniques for determining morphology and optical features of high refractive index dielectric nanoparticle size

Ángela I. Barreda , Juan M. Sanz, Rodrigo Alcaraz de la Osa, José M. Saiz, Fernando Moreno, Francisco González

Author Affiliations +

Proceedings Volume 9756, Photonic and Phononic Properties of Engineered Nanostructures VI; 975627 (2016) https://doi.org/10.1117/12.2229488
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

The spectral evolution of the degree of linear polarization (P_L) at a scattering angle of 90° is studied numerically for high refractive index (HRI) dielectric spherical nanoparticles. The behaviour of P_L(90°) is analyzed as a function of the refractive index of the surrounding medium and the particle radius. We focus on the spectral region where both electric and magnetic resonances of order not higher than two are located for various semiconductor materials with low absorption. The spectral behavior of P_L(90°) has only a small, linear dependence on nanoparticle size R. This weak dependence makes it experimentally feasible to perform real-time retrievals of both the refractive index of the external medium and the NP size R. From an industrial point of view, pure materials are nonrealistic, since they can only be provided under certain conditions. For this reason, we also study the effect of contaminants on the resonances of silicon NPs by considering the spectral evolution of P_L(90°).

Citation Download Citation

Ángela I. Barreda , Juan M. Sanz, Rodrigo Alcaraz de la Osa, José M. Saiz, Fernando Moreno, and Francisco González "Polarimetric techniques for determining morphology and optical features of high refractive index dielectric nanoparticle size", Proc. SPIE 9756, Photonic and Phononic Properties of Engineered Nanostructures VI, 975627 (14 March 2016); https://doi.org/10.1117/12.2229488

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