Asymmetric diffraction from two-component optical gratings made of passive and lossy materials

Guanquan Liang, Ayman Abouraddy, Demetrios Christodoulides, Edwin L. Thomas
2016 Optics Express  
Diffraction with asymmetric enhancement and suppression, and alternating contrast for symmetric diffraction orders is demonstrated from planar two-component optical gratings made of passive/lossy materials. Simulations agree well with the experimental diffraction pattern of the fabricated sample. Our fabrication approach uses simple, standard planar micro/nano lithography employing one photoresist and one dye. No 3D profiling is needed. The phenomena is due to the left-right asymmetric material
more » ... asymmetric material distribution in the periodic grating, which gives rise to non-reciprocal light coupling for diffraction to the positive and negative orders.
doi:10.1364/oe.24.030164 pmid:28059293 fatcat:tjbyzsguafahbamomdtyxir6uu