Theory of Radiative Lifetime of an Activator Ion due to Surface Plasmons. (4th May 2018)

• Record Type: Journal Article
• Authors: Mishra, K. C.; Collins, J.; Piquette, A.
• Is Part Of: ECS journal of solid state science and technology. Volume 7:Number 5(2018)
• Page Start: R42
• Page End: R49
• Publication Date: 2018-05-04
• Subjects: Lifetime -- Luminescence -- Plasmon; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0081805jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : We consider the lifetime of a phosphor layer situated near a metallic film. We first make general observations of the effect of the plasmons on the lifetime and quantum efficiency of the luminescent ions in the phosphor layer and on the role of the plasmons in the emission process. The effect of the plasmons in the excitation process and on the total luminescence from the system is also discussed. We then derive an expression for the lifetime of the optical ions interacting with the surface plasmon modes using the Einstein A and B coefficient formalism, which requires a determination of the mode density of the surface plasmons. Because the surface plasmons represent a 2-dimensional system, a length parameter must be introduced into the expression of the mode density. We derive this parameter using a semi-classical approach, and show its dependence on the dielectric constants of the system and on the distance from the metallic layer.