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An 'electromagnetic wiggler' originating from refraction of waves at the side edge of a Bragg reflector

Iorsh, I.V.; Kaliteevski, M.A.; Brand, S.; Abram, R.A.; Kaliteevskaya, N.A.

Authors

I.V. Iorsh

M.A. Kaliteevski

S. Brand

N.A. Kaliteevskaya



Abstract

Calculations are reported which predict that light incident on the side edge of a Bragg reflector can show varied and unusual refraction behaviour, including a rapid transition from positive to negative refraction. Although under certain conditions negative refraction can occur, it is concluded that perfect lensing based on it is unlikely to be realised in practice. However, it is shown that light incident obliquely on the structure can be made to propagate normal to the interface after refraction while exhibiting lateral oscillations of its Poynting vector, an effect that could possibly find application in an 'electromagnetic wiggler'. It is also shown that negative group velocity rather than negative effective mass is required for the observation of the negative refraction, and in the case of low refractive index contrast, negative refraction occurs only when the size of the illumination spot exceeds a critical value, which is inversely proportional to the contrast of the refractive indices.

Citation

Iorsh, I., Kaliteevski, M., Brand, S., Abram, R., & Kaliteevskaya, N. (2011). An 'electromagnetic wiggler' originating from refraction of waves at the side edge of a Bragg reflector. Journal of Modern Optics, 58(8), 686-693. https://doi.org/10.1080/09500340.2011.565887

Journal Article Type Article
Publication Date May 1, 2011
Deposit Date Jun 6, 2011
Journal Journal of Modern Optics
Print ISSN 0950-0340
Electronic ISSN 1362-3044
Publisher Taylor and Francis Group
Peer Reviewed Peer Reviewed
Volume 58
Issue 8
Pages 686-693
DOI https://doi.org/10.1080/09500340.2011.565887
Keywords Negative refraction, Photonic crystal, Bragg reflector, Photonic crystals, Negative refraction, Bloch Oscillations, Mirrors.
Public URL https://durham-repository.worktribe.com/output/1507825