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4 October 2023 Momentum considerations inside metamaterials with extreme parameters
Michaël Lobet, Inigo Liberal, Angel Ortega-Gomez, J. Enrique Vázquez-Lozano, Larissa Vertchenko, Andrei Lavrinenko, Nader Engheta, Eric Mazur
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Proceedings Volume PC12647, Active Photonic Platforms (APP) 2023; PC126470R (2023) https://doi.org/10.1117/12.2677269
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Electromagnetic momentum inside a material is notion quite subtle to define, related to the Abraham-Minkowski debate. With new class of metamaterials emerging, allowing for extreme electromagnetic parameters such as near-zero refractive index materials or time-varying materials, those subtilties should treated with great care. Here, we revise fundamental radiative processes, momentum transfer experiments, diffraction, Doppler shift, Heisenberg inequality and microscopy applications inside near-zero refractive index. Furthermore, we demonstrate that the Minkowski momentum -related to spatial translation - is a conserved quantity inside time-varying media by three independent approaches. However, we stress how the Abraham momentum – related to energy transport – is not a conserved quantity in time-varying media.
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Michaël Lobet, Inigo Liberal, Angel Ortega-Gomez, J. Enrique Vázquez-Lozano, Larissa Vertchenko, Andrei Lavrinenko, Nader Engheta, and Eric Mazur "Momentum considerations inside metamaterials with extreme parameters", Proc. SPIE PC12647, Active Photonic Platforms (APP) 2023, PC126470R (4 October 2023); https://doi.org/10.1117/12.2677269
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KEYWORDS
Electromagnetic metamaterials
Electromagnetism
Refractive index
Diffraction
Doppler effect
Microscopy
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