Geometrical phase and surface plasmon focusing with azimuthal polarization

• Published in: Optics letters Vol. 37; no. 4; p. 581
• Main Authors: Chen, Weibin, Nelson, Robert L, Zhan, Qiwen
• Format: Journal Article
• Language: English
• Published: United States 15.02.2012

Owing to a geometric phase effect, an isosceles triangular aperture etched into thin metal film leads to constructive or destructive interference of surface plasmons excited at the two equal sides under linearly polarized illumination. Through appropriate spatial arrangement of an array of triangles...