Date of Award
2020
Document Type
Open Access Master's Thesis
Degree Name
Master of Science in Applied Physics (MS)
Administrative Home Department
Department of Physics
Advisor 1
Jae Yong Suh
Committee Member 1
Chito Kendrick
Committee Member 2
Miguel Levy
Abstract
Chiral metamaterials are artificially tailored materials that are composed of nanoparticles that lack in-plane mirror symmetry. Application of chirality to plasmonic nanostructures can lead to chiro-optical effects such as asymmetric transmission of circularly polarized light, circular dichroism and optical activity. When light is incident on metallic nanoparticles, conduction electrons undergo collective oscillations within the nanoparticles, resulting in localized surface plasmon (LSP) resonance. Surface lattice resonances (SLRs) are hybrid plasmonic-photonic modes arising from the radiative coupling between LSPs and electromagnetic waves diffracted in the plane of the periodic array. Because of the collective dipole interactions, SLRs have less radiative losses compared to LSP resonances. In this thesis, SLRs in chiral metamaterials are studied and discussed. Three-dimensional chiral gold plasmonic nanocubes were fabricated and transferred to periodic arrays of hexagonal and square lattices. The components of chirality tensor are obtained from the asymmetric transmission dispersions of SLR modes. The strength of the asymmetry in dispersion relation is scaled as the optical activity that originates from the broken space inversion symmetries of the nanocubes in the arrays.
Recommended Citation
Boora, Manpreet, "OPTICAL DISPERSION RELATIONS FROM THREE-DIMENSIONAL CHIRAL GOLD NANOCUBES IN PERIODIC ARRAYS", Open Access Master's Thesis, Michigan Technological University, 2020.