Physics – Condensed Matter – Materials Science
Scientific paper
2003-08-02
Phys. Rev. B 69, 075105 (2004)
Physics
Condensed Matter
Materials Science
20 pages, 5 figures
Scientific paper
10.1103/PhysRevB.69.075105
We have developed a nonlinear differential effective dipole approximation (NDEDA), in an attempt to investigate the effective linear and third-order nonlinear susceptibility of composite media in which graded spherical inclusions with weak nonlinearity are randomly embedded in a linear host medium. Alternatively, based on a first-principles approach, we derived exactly the linear local field inside the graded particles having power-law dielectric gradation profiles. As a result, we obtain also the effective linear dielectric constant and third-order nonlinear susceptibility. Excellent agreement between the two methods is numerically demonstrated. As an application, we apply the NDEDA to investigate the surface plasma resonant effect on the optical absorption, optical nonlinearity enhancement, and figure of merit of metal-dielectric composites. It is found that the presence of gradation in metal particles yields a broad resonant band in the optical region, and further enhances the figure of merit.
Gao Lan
Huang Ji Ping
Yu Kin Wah
No associations
LandOfFree
Effective nonlinear optical properties of composite media of graded spherical particles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effective nonlinear optical properties of composite media of graded spherical particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effective nonlinear optical properties of composite media of graded spherical particles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-156292