Talbot effect beyond the paraxial limit at optical frequencies.
This paper reports the experimental and theoretical investigation of the Talbot effect beyond the paraxial limit at optical frequencies. Au hole array films with periodicity a(0) comparable to the wavelength of coherent illumination λ were used to study the non-paraxial Talbot effect. Significant differences from the paraxial (classical) Talbot effect were observed. Depending on the ratio of a(0)/λ, the interference pattern in the direction perpendicular to the hole array was not necessarily periodic, and the self-image distances deviated from the paraxial Talbot distances. Defects within the hole array film or above the film were healed in the self-images as the light propagated from the surface.
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA.
Yi
Y
Hua
Jae Yong
JY
Suh
Wei
W
Zhou
Mark D
MD
Huntington
Teri W
TW
Odom
D003198:Computer Simulation; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation