Blaze produced by a dual-period array of subwavelength cylinders

MARCELO LESTER,; DIANA CARINA SKIGIN; RICARDO DEPINE

JOURNAL OF OPTICS. A, PURE AND APPLIED OPTICS (PRINT)

Institute of Physics Publishing LTD

Lugar: Bristol; Año: 2009 vol. 11 p. 45705 - 45705

1464-4258

We propose an alternative way of enhancing the intensity diffracted by a grating in a givendirection using a dual-period array. Each period comprises several identical cylinders withdiameters much smaller than the incident wavelength (subwavelength cylinders), whose axes arealigned in a plane which is tilted with respect to the periodicity direction. We present results formetallic and dielectric cylinders, and show that in both cases this structure behaves like a blazedgrating in the sense of its capability to enhance the intensity in a pre-designed direction. Thisblazed-like behavior is found for both incident polarization modes. If we consider the quickevolution of manufacturing techniques of nanogratings, such structures constitute a realizablealternative not only for the microwave and millimeter wave regions but also for optical devices.