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A Broadband Optical Isolator Based on Chiral Plasmonic-Metamaterial Design
Progress In Electromagnetics Research M, Vol. 81, 67-73, 2019
We theoretically propose a novel achromatic optical isolator based on circular dichroism in metamaterials of twisted chains of metallic nanoparticles. The suggested optical isolator consists of an input polarizer, followed by quarter-wave plate, then a circular dichroism material, another quarter-wave plate, and an output polarizer. In contrast to the most commonly used optical isolators, the current scheme does not use magnetic field and does not change the polarization plane.
Andon Rangelov, Sotiris Droulias, and Vassilios Yannopapas, "A Broadband Optical Isolator Based on Chiral Plasmonic-Metamaterial Design," Progress In Electromagnetics Research M, Vol. 81, 67-73, 2019.

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