Abstract
We present the underlying theory, the design specifications, and the simulated demonstration of a high performance broadband asymmetric polarization conversion composed of an L-shaped gold particle and a gold nanoantenna array for the near-infrared regime. It can transform linearly polarized light to its cross polarization in the transmission mode for one propagation direction and efficiently reflect the light for the opposite propagation direction. The broadband asymmetric polarization conversion can be attributed to the polarization-dependent reflection of the nanoantenna array, which enhances the polarization conversion efficiency of the L-shaped particle and makes it asymmetric and devisable. This work offers a further step in the development of a high efficiency broadband optical activity device.
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Acknowledgments
This work was supported by the National Basic Research Program (973 Program) of China (2012CB921900), the Chinese National Key Basic Research Special Fund (2011CB922003), the Natural Science Foundation of China (61378006 and 11304163), the Program for New Century Excellent Talents in University (NCET-13-0294), the International Science & Technology Cooperation Program of China (2013DFA51430), the Specialized Research Fund for the Doctoral Program of Higher Education (20120031120032), the Natural Science Foundation of Tianjin (13JCQNJC01900), the National Science Fund for Talent Training in Basic Sciences (J1103208), and the 111 project (B07013).
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Li, Z., Chen, S., Liu, W. et al. High Performance Broadband Asymmetric Polarization Conversion Due to Polarization-dependent Reflection. Plasmonics 10, 1703–1711 (2015). https://doi.org/10.1007/s11468-015-9986-2
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DOI: https://doi.org/10.1007/s11468-015-9986-2