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Subwavelength Quarter-Waveplate Composed of L-Shaped Metal Nanoparticles
Authors:Jing Yang  Jiasen Zhang
Institution:(1) State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing, 100871, People’s Republic of China;
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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