Abstract
We propose a subwavelength quarter-waveplate composed of four L-shaped nanoparticles that act as optical nanoantennas and investigate its optical properties using the finite-difference time-domain method. When polarization of the incident beam is parallel to one arm of the antenna, polarization of the scattering light rotates 45° with respect to that of the incident beam due to the symmetry of the L-shaped nanoantennas. Phase retardation is generated by changing the arm length of the antennas. The influence of the distance between the L-shaped nanoantennas on the far-field radiation is also discussed.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China under grants 61036005 and 11074015, the Research Fund for the Doctoral Program of Higher Education under grant 20090001110010, and the National Basic Research Program of China under grants 2009CB623703 and 2007CB307001.
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Yang, J., Zhang, J. Subwavelength Quarter-Waveplate Composed of L-Shaped Metal Nanoparticles. Plasmonics 6, 251–254 (2011). https://doi.org/10.1007/s11468-010-9196-x
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DOI: https://doi.org/10.1007/s11468-010-9196-x