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Isotropic photonic magnetoresistance
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Scanning electron microscope image of a typical Ni particle highlighting an overall spheroid shape and sub- columnar microstructure. (b) A conceptual illustration of the excitation of a terahertz particle plasmon on a metallic microsphere. (c) After excitation, the particle plasmon decays via radiation reemission or nonradiative decay in the metallic sphere.

Image of FIG. 2.
FIG. 2.

(Color online) Time-domain transmitted terahertz electric field wave forms through porous Ni particles for various magnitudes, with (a) and (b) . The inset in (a) portrays the reference wave form transmitted through an empty polystyrene sample cell. (c) Power and (d) arrival delay of the transmitted pulse vs applied external magnetic field strength for and configurations. (e) Power and (f) arrival delay of the transmitted pulse through solid Ni spheroids vs applied external magnetic field strength for and configurations.

Image of FIG. 3.
FIG. 3.

(Color online) Top panels illustrate the solid (left) and porous (right) structures employed in three-dimensional finite difference time-domain calculations, which use spatial and temporal resolutions of and , respectively. A quadrant of the particles is removed for illustrative purposes to highlight the internal structures. Electric field amplitude images of single-cycle terahertz pulse excitation of (a) a solid Ni spheroid and (b) a porous Ni spheroid after the arrival of the terahertz pulse. Corresponding charge density images for a solid Ni spheroid [(c), (e), and (g)] and a porous Ni spheroid [(d), (f), and (h)] at various times. The arrows depict the polarization orientation of the incident electric field.


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Scitation: Isotropic photonic magnetoresistance