Abstract
We propose the way of enhancing the enhancement factor of local field, and increasing the input domain threshold of the optical induced bistability of a spherical metal/dielectric composites within a linear host matrixes. The local field enhancement factor of a metal particles with dielectric core in the presence of double interfacial layers shows two maxima at two different frequencies. By introducing double interfacial layers, we calculate the enhancement factor of the local field. Also using the cubic equation the optical induced bistability of the composite material is calculated. Because of the double interfacial layers, we observe an increasing of the input domain threshold of the optical induced bistability. In comparison with the same composite without interfacial layer and with having single interfacial layer, our finding shows that, introducing additional interfacial layer makes the composite having a better enhancement factor and much better input domain threshold of the optical induced bistability.
Highlights
The rapid growth of studding the effects of nonlinear optical property becomes an interesting area in modern photonic functionalities, including ultrafast optical switching, optical transistors and optical modulation [1, 2, 3]
In this we proposed a metallic/dielectric composite with double interfacial layers
The interfacial layers are between the dielectric core and the metal shell and between the metal shell and the host matrix
Summary
The rapid growth of studding the effects of nonlinear optical property becomes an interesting area in modern photonic functionalities, including ultrafast optical switching, optical transistors and optical modulation [1, 2, 3]. The presence of interfacial layer enhances the local electric field inside the metal/dieletric composite and increase the threshold of observing the optical induced bistability(IOB) [7]. This work proposes the way of enhancing the local field and increasing the threshold of OIB inside the metal/dielectric composite by introducing double interfacial layers.
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