Temperature Dependence of Nonlinear Optical Properties in Metal/Dielectric Composites

✍ Scribed by Lei Gao; Zhen-Ya Li

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 241 KB
• Volume: 218
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/1521-3951(200004)218:2<571::aid-pssb571>3.0.co;2-m

✦ Synopsis

Temperature-dependent nonlinear optical properties including the real part, imaginary part and the magnitude of effective nonlinear optical susceptibility c e in metal/dielectric composites are studied by means of the decoupling approximation and spectral representation. The variation of these physical parameters with temperature is obtained by taking into account the temperature dependence of metallic optical properties. Numerical results in Ag/MgF 2 composites show that the temperature has much significant influence on the strength of nonlinear properties especially in the surface plasmon resonance band (SPRB), but does not shift the location of the resonance band. Temperature-independent cancelling concentrations p c1 and p c2 , at which the real part Re c e or the imaginary part Im c e go to zero, respectively, are predicted. We also find that the enhancement of jc e j at a certain frequency w % 8X3 eVa" h, close to the plasmon frequency w p % 9X06 eVa" h, is large and can be easily sustained to high temperatures.