Microfluid-enabled fine tuning of circular dichroism from chiral metasurfaces
Abstract
We propose and numerically demonstrate a microfluid-enabled spin-selective chiral metasurface with tunable circular dichroism. The chiral metasurface consists of periodic array of gammadion-like multilayer nanostructures. With the help of microfluidic technology, fine tuning of circular dichroism from the chiral metasurface can be achieved. Numerical results show that a broad tuning range of 40 nm can be achieved, while the circular dichroism only shows a slight decrease. Such a proposed device could be potentially useful for chirality detection, polarimetric imaging, and spin-communications.
- Publication:
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Journal of Physics D Applied Physics
- Pub Date:
- October 2019
- DOI:
- 10.1088/1361-6463/ab3129
- Bibcode:
- 2019JPhD...52O5102P
- Keywords:
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- tunable chirality;
- metasurface;
- microfluidics;
- circular dichroism