King, Christopher_Paper_DSDS17_2017-11-30.pdf (496.22 kB)

Invisible Random Media and Diffraction Gratings That Don’t Diffract

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journal contribution
posted on 15.11.2017, 12:00 by Christopher King, S.A.R. Horsley, T.G. Philbin
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.


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


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