Abstract
A method for rendering bundle beams by utilizing the destructive
interference effects of beams from multiple subwavelength slits surrounded
by dielectric surface gratings is proposed. With oblique incident light on
the multiple slits, it is possible to control the phases of surface plasmon
polaritons (SPPs) induced in the slits. When these phases have a certain
relationship, beams from the SPPs excited on the corrugated surface render
separated beams or bundle beams, as interfering destructively. Because of
the destructive interference, separation between the beams is clear. In
addition, the beam width of the bundle beams is narrow, in a degree of
several wavelengths of the light.
© 2010 IEEE
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