The effect of the Kerr nonlinearity on the transmission through the nanoslit gold film

Abstract

This paper has made a theoretical study of enhanced transmission through a gold grating with arrays of subwavelength slits filled with nonlinear Kerr medium. The results of the research are based on rigorous finite-difference time domain calculations. The resonance transmission peaks in the investigated wavelength range are produced as a result of the surface plasmon resonance collaborated with the localized waveguide resonance. The paper also gives a detailed analysis of the influence exerted by various factors: thickness, third-order susceptibility and line refractive index of the nonlinear medium filled in the gold slits arrays and the incident intensity to the transmission. It is found that the small changes of parameters such as medium thickness, third-order susceptibility and line refractive index of the nonlinear medium filled in the gold slits arrays as well as the incident intensity can bring great changes of lateral shift and magnitude variation of the transmission resonance peaks. The report proposes that these phenomena can be applied to designing precise optical switches. slit array, nonlinear medium, localized waveguide resonance, surface plasmon resonance, Kerr nonlinear effect PACS: 78.66. Bz, 42.25.Bs, 41.20.Jb, 42.29.Ag

Mechanisms for enhancing the optical transmission through a single

“…As we showed before, among the possible arrangements, an interesting example is a slit array deposited over a nonlinear dielectric slab of finite thickness, but also a slit array filled with it, investigated in Ref. [68,176,178], where the non-linear phenomena described originates from OKE, and in Ref. [180], where several aspects of harmonic generation has been analyzed.…”

“…On the contrary, if metallic inclusions are present, the electric field can be efficiently enhanced and nonlinear effects in metallo-dielectric structures may occur at lower laser powers [166,174]. Different configurations of metal slit arrays combined with nonlinear dielectrics have been widely investigated for their potential uses in optical bistability [68,175,176], nonlinear beam manipulation [177,178] and switching [168,179]. As we showed before, among the possible arrangements, an interesting example is a slit array deposited over a nonlinear dielectric slab of finite thickness, but also a slit array filled with it, investigated in Ref.…”

Metallic slit arrays filled with third-order nonlinear media: Optical Kerr effect and third-harmonic generation

“…On the contrary, if metallic inclusions are present, the electric field can be efficiently enhanced and nonlinear effects in metallodielectric structures may occur at lower laser powers. 2,3 Different configurations of metal slit arrays combined with nonlinear dielectrics have been widely investigated for their potential uses in optical bistability, [4][5][6] nonlinear beam manipulation, 7,8 and switching. 9,10 Among the possible arrangements, an interesting example is a slit array filled with nonlinear dielectrics, investigated in Refs.…”

“…9,10 Among the possible arrangements, an interesting example is a slit array filled with nonlinear dielectrics, investigated in Refs. 4,6, and 8, where the nonlinear phenomena described originate from OKE, and in Ref. 11, where several aspects of harmonic generation have been analyzed.…”

Efficient preparation of a four-photon cluster state with homodyne measurement via cross-Kerr nonlinearity

“…In ref. [21], Xie et al studied the effect of the Kerr nonlinearity on the transmission through the nanoslit gold film. The theoretical investigation into Raman induced Kerr effect spectroscopy in nonlinear confocal microscopy is discussed in ref.…”