We show that finite-size nondiffracting beams can be generated by a subwavelength metallic hole with surrounding dielectric grating structures. An analytic field model that describes the diffractive formation of finite-size nondiffracting beams is addressed. The generation of finite-size nondiffracting beams from a subwavelength metallic hole with surrounding concentric dielectric binary gratings is numerically demonstrated by three-dimensional rigorous coupled wave analysis.
© 2009 Optical Society of America
Original Manuscript: June 5, 2009
Revised Manuscript: September 3, 2009
Manuscript Accepted: September 4, 2009
Published: September 21, 2009
Hwi Kim, Junghyun Park, and Byoungho Lee, "Finite-size nondiffracting beam from a subwavelength metallic hole with concentric dielectric gratings," Appl. Opt. 48, G68-G72 (2009)