The Calculation of Surface Plasmon of Ag Nanowire on Quantum Dots Semiconductor

The surface conduction electrons of Ag nanowire and quantum

dots semiconductor provide the collective excitations.

ZnO with wide direct band gap (3.37 eV) is a well-known and

an interesting compound semiconducting material, which have

been used for the fabrication of light emitting diodes and

piezoelectric devices in spontaneous emission amplifiers.

Furthermore the fluorescence emission is enhanced in Ag

nanowire/ZnO quantum dot system.The resonance peak depends

on the shape of the Ag nanowire. The red shift of the peak

becomes more obvious with the increase of Ag nanowire

radius. The localized surface plasmon resonance modes of Ag

nanowires are investigated theoretically by Maxwell's

equations and the usual boundary conditions method. The

introduction of the electronic density directly into the

macroscopic dielectric constant is used as a means of

calculating the plasmon frequency of inhomogeneous

electronic systems. The spectrum, electric field

distribution versus excitation wavelength of Ag nanowires

are simulated. The results show that the Ag nanowires have

peaks.