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Permanent URI for this communityhttps://hdl.handle.net/20.500.14288/2
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Publication Restricted Dynamics of optical soliton-surface plasmon in dielectric-metal nad metal-dielectric-metal interfaces(Koç University, 2012) Aydındoğan, Güneş; Güven, Kaan; 0000-0002-1097-5106; Koç University Graduate School of Sciences and Engineering; Physics; 52290
Publication Metadata only Minimizing the focal shift effect on 2D metalenses(Institute of Electrical and Electronics Engineers Inc., 2023) Department of Physics; Ramazanoğlu, Serap Aksu; Department of Physics; College of SciencesFor a metalens, which obeys the fundamental laws governed by diffraction, improving the image quality and resolution at the focal region has been the most valuable and desirable feature [1-3]. Early classical investigations claim that the principal maximum intensity of the diffracted wave is located at the geometric focus, and the field exhibits definite symmetry about the geometrical focal plane. However, with the extended use of lasers it is shown that during the experiments the principal maximum intensity of the incident wave may not occur at the preset geometrical focus butt may be located closer to the lens. This phenomenon is referred as the 'focal shift'. One important detrimental result of the focal shift phenomenon is the asymmetric intensity distribution in the focal region [4-6]. Thus, reducing the focal shift for a better performing metalens is critical as it leads to a symmetric airy disc like field distribution on focal spot. © 2023 IEEE.Publication Restricted Nonlinear dynamical aspects of the dielectric waveguide surface plasmon josephson junction(Koç University, 2011) Özok, Yasa Ekşioğlu; Güven, Kaan; 0000-0002-1097-5106; Koç University Graduate School of Sciences and Engineering; Physics; 52290