Exceptional linear and nonlinear optical properties of low-symmetry metal nanoparticle arrays

Brian K. Canfield; Sami Kujala; Konstantins Jefimovs; Tuomas Vallius; Jari Turunen; Martti Kauranen

doi:10.1117/12.555762

19 October 2004 Exceptional linear and nonlinear optical properties of low-symmetry metal nanoparticle arrays

Brian K. Canfield, Sami Kujala, Konstantins Jefimovs, Tuomas Vallius, Jari Turunen, Martti Kauranen

Proceedings Volume 5512, Plasmonics: Metallic Nanostructures and Their Optical Properties II; (2004) https://doi.org/10.1117/12.555762
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Recent interest in the study of metal nanoparticles and related structures has greatly increased. Technologies such as electron beam lithography facilitate the fabrication of such subwavelength structures. Much research has focused on the linear optical properties of high-symmetry particles, such as ellipsoids and spheroids. However, we focus on both the linear and nonlinear optical responses of low-symmetry L-shaped nanoparticles. We show that these nanoparticle arrays are exceptionally sensitive to polarization. Small asymmetries in the particle shapes lead to large deviations in the primary extinction directions from expected locations. The structural asymmetries may also induce optical activity. We present results of detailed polarization analysis through second-harmonic generation experiments that are based on symmetry arguments regarding the second-order susceptibility tensor. The results confirm that the structural deviations from the ideal shape lead to further breakdown in the symmetry properties of the arrays.

Citation Download Citation

Brian K. Canfield, Sami Kujala, Konstantins Jefimovs, Tuomas Vallius, Jari Turunen, and Martti Kauranen "Exceptional linear and nonlinear optical properties of low-symmetry metal nanoparticle arrays", Proc. SPIE 5512, Plasmonics: Metallic Nanostructures and Their Optical Properties II, (19 October 2004); https://doi.org/10.1117/12.555762

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