Special theory of relativity for a graded index fibre
نویسندگان
چکیده
The speed of light ( c ) in a vacuum is independent the choice frames to describe propagation, according theory relativity. We consider how characterised material, where different from that due finite dielectric constant. phase velocity material smaller than , such moving frame can be larger velocity, move faster material. Consequently, an unusual Doppler effect expected, and wavelength changes red-shift blue-shift upon increasing frame. corresponding energy also sign positive negative, while momentum always positive, leading signs for helicity. In graded index fibre, exact solution available, even more complicated phenomena are effective mass photons. Upon increase gap, generated by optical confinements orbital angular momentum, photons increases. If gap large enough, starts change positive. this case, diverges if agreement with fame velocity. Contrary behaviours group below . This thought experiment might useful considering insight into polarisation state light.
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ژورنال
عنوان ژورنال: Frontiers in Physics
سال: 2023
ISSN: ['2296-424X']
DOI: https://doi.org/10.3389/fphy.2023.1225387