title: Effect of surface plasmons on spectral switching of polychromatic light with Au-double-slit.
abstract: It is shown that the generation of surface plasmons on a metal-dielectric interface, i.e., a Au-double-slit and air interface, appreciably affects the intensity of the diffracted light. With a specific example of Au-double-slit and electro-optic devices before the slits, the spectral switching in the diffracted field with the polychromatic light is shown for the first time, to our knowledge. It is found that at the observation point due to the surface plasmon effect the intensity of the diffracted light periodically increases and decreases with the separation of the double-slit.
authors.affiliation: CSIR-National Physical Laboratory, New Delhi, India. vermam@mail.nplindia.ernet.in
authors.forename: Manish
authors.initials: M
authors.lastname: Verma
authors.forename: Stuti
authors.initials: S
authors.lastname: Joshi
authors.forename: Nandan S
authors.initials: NS
authors.lastname: Bisht
authors.forename: H C
authors.initials: HC
authors.lastname: Kandpal
authors.forename: P
authors.initials: P
authors.lastname: Senthilkumaran
authors.forename: Joby
authors.initials: J
authors.lastname: Joseph