Invisible Random Media and Diffraction Gratings That Don’t Diffract
Date published
2017-11-15 12:00
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Cranfield University
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Technical report
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Citation
King, Christopher; Horsley, S.A.R.; Philbin, T.G. (2017). Invisible Random Media and Diffraction Gratings That Don’t Diffract. Cranfield Online Research Data (CORD). Journal contribution. https://doi.org/10.17862/cranfield.rd.5589817.v1
Abstract
Technical paper presented at the 2017 Defence and Security Doctoral Symposium. Electromagnetic waves propagating through inhomogeneous media will, in general, be scattered in multiple directions. In practical situations this is often undesirable. In this work we discuss ways to mathematically design lossless linear isotropic graded index permittivity profiles in one and two dimensions which suppress scattering. This has some counter-intuitive implications, such as disordered media exhibiting perfect transmission, and periodic gratings which don’t diffract.
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Github
Keywords
'Invisibility', 'Wave propagation', 'Graded-index', 'DSDS17 technical paper', 'DSDS17', 'Electrical and Electromagnetic Methods in Geophysics'
DOI
10.17862/cranfield.rd.5589817.v1
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CC BY 4.0
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The authors acknowledge funding from EPSRC Centre for Doctoral Training in Electromagnetic Metamaterials grant number EP/L015331/1, EPSRC program grant number EP/1034548/1, the Royal Society, and Tata