Title :
An ultrathin quarter-wave nano-plate based on detuned plasmonic nanoantennas
Author :
Zhao, Yang ; Alù, Andrea
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
We analyze and experimentally demonstrate the design of an ultrathin quarter-wave plate based on detuned plasmonic nanoantennas. We explore the theoretical possibilities offered by thin metasurfaces to manipulate the polarization state of impinging light, and propose an optimal design to realize quarter-wave metasurface plates, analyzing their frequency and angular response. One of the most interesting features of our design is the large degree of linear polarization output for circularly polarized input over broad bandwidths in the visible, despite the extreme thinness. The geometry is implemented with one-step planar lithography, providing opportunities for integration in optical systems for polarization control, detection and sensing at the nanoscale.
Keywords :
antennas; frequency response; light polarisation; metamaterials; nanophotonics; optical design techniques; optical retarders; optical tuning; photolithography; plasmonics; angular response; broad bandwidths; circularly polarized input; detuned plasmonic nanoantennas; frequency response; impinging light; linear polarization output; nanoscale detection; nanoscale sensing; one-step planar lithography; optical systems; optimal design; polarization control; polarization state; quarter-wave metasurface plates; thin metasurfaces; ultrathin quarter-wave nanoplate; visible range; Nanoscale devices; Optical diffraction; Optical polarization; Optical retarders; Optical sensors; Plasmons; Polarization;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6349262
