We report on the formation of plasmonic bandgaps in two-dimensional periodic arrangements of gold patches. Orthogonal arrays of subwavelength slits with different periodicities have been studied by means of a three- dimensional finite-difference time-domain (FDTD) code, changing incident polarization and geometrical param eters. Spectral response of gold patches having different a form factor and surrounded by different media have been also investigated and compared in order to give a full description of bandgap shifts paving the way for the design of polarization-sensitive devices.
© 2011 Optical Society of America
Diffraction and Gratings
Original Manuscript: November 2, 2010
Revised Manuscript: January 18, 2011
Manuscript Accepted: February 16, 2011
Published: March 9, 2011
Roberto Marani, Marco Grande, Valeria Marrocco, Antonella D’Orazio, Vincenzo Petruzzelli, Maria A. Vincenti, and Domenico de Ceglia, "Plasmonic bandgap formation in two-dimensional periodic arrangements of gold patches with subwavelength gaps," Opt. Lett. 36, 903-905 (2011)