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As computational power and relevant literature increases, more researchers are using multiphysics simulation for their work. Numerically combining physics simulations of electromagnetic and fluid dynamics is assisted by the fact their finite difference methods both use a staggered mesh and an initialized geometry of materials [3, 1]. Major differences occur when trying to include introductory heat...
We introduce a general criterion to predict conditions under which a flat planar medium is capable of imaging a point source. Such a planar medium, known as a flat lens, is attractive due to its potential for imaging over unbounded aperture dimensions. The criterion first assumes a point source on one side of the medium and then evaluates the position of the image based on the phase of the paraxial...
Plasmonic waveguide metamaterials are some of the most promising structures for achieving a negative index of refraction at optical frequencies. In this paper, we analyze one such structure through a three-dimensional Fourier decomposition of electromagnetic fields into plane-wave components with purely real wave vectors. The visual depiction of the Poynting vector associated with each plane wave...
There are several different expressions for the electromagnetic force density inside a material. In addition to the canonical Lorentz force density, there exist at least four other expressions based on the Abraham, Minkowski, Einstein-Laub, and Chu formulations of electrodynamics. Experiments to distinguish the various expressions are sparse because differences are apparent only under exotic conditions...
In 1968, Veselago postulated the existence of left-handed electromagnetic media bearing the unique ability to sustain electromagnetic plane waves with contradirectional power and phase flow (V. Veselago, Sov. Phys. Usp., 10, 509). Counter-intuitive optical properties predicted to be associated with left-handed media include negative refraction, a reversed Doppler effect, a reversed Cherenkov effect,...
The phenomenon of radiation pressure was first predicted by Maxwell in the late 1800s as a natural consequence of the energy and momentum content of electromagnetic waves. By the early 1900s, radiation pressure was measured by observing the light-driven deflection of mirrors suspended in vacuum. Due to co-linear propagation of electromagnetic energy and momentum in vacuum and nearly all naturally...
We build a portable, low-cost microscope capable of bright-field and fluorescence imaging with micron-scale resolution in reflection or transmission mode. Software control of image capture and actuation enables automated focusing and large-area sample visualization.
Over a half-century ago, Balazs proposed a thought experiment to deduce the form of electromagnetic momentum in a lossless and non-dispersive slab by imposing conservation of global momentum and system center-of-mass velocity after a pulse has traveled through the slab. Here, we revisit the Balazs thought experiment by explicit calculations of momentum transfer and center-of-mass displacement of a...
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