In this paper the phase singularities of the electromagnetic field near a sub-wavelength slit are studied. These phase singularities, such as optical vortices, are found in regular patterns, which can be created or annihilated under the conservation of certain topological quantities, when a parameter such as the slit width is changed. The connection between the phase singularities and the light transmission though the slit is considered.
|Journal||Journal of Optics B, Quantum and Semiclassical Optics|
|Publication status||Published - 2004|
Schouten, H. F., Visser, T. D., & Lenstra, D. (2004). Optical vortices near sub-wavelength structures. Journal of Optics B, Quantum and Semiclassical Optics, 6, S404-S409. https://doi.org/10.1088/1464-4266/6/5/031