The Influence of Particle Shape on Nonlinear Optical Properties of Metal-Dielectric Composites

Wu, Yi; Gao, Lei; Li, Z.Y.

doi:10.1002/(sici)1521-3951(200008)220:2<997::aid-pssb997>3.0.co;2-c

Cited by 27 publications

(12 citation statements)

References 17 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Deliquesced particles scatter more light than their solid counterparts [ Wang et al , 2008]. Calculations show significant differences in light scattering depending on particle hygroscopicity and whether particles are internally or externally mixed [ Wu et al , 2000; Lesins et al , 2002; Wang and Martin , 2007; Mishra et al , 2008; Ling and Chan , 2008]. Certain particles, particularly salts such as from ocean spray and biomass burning, are usually modeled with spherical shapes because of their hygroscopic nature.…”

Section: Introductionmentioning

confidence: 99%

Internally mixed atmospheric aerosol particles: Hygroscopic growth and light scattering

2010

View full text Add to dashboard Cite

[1] Internally mixed aerosol particles consisting of one or more hygroscopic compounds can contain both solid and liquid parts, the details depending on the relative humidity (RH). The solid-to-liquid transition of such particles as the RH increases influences their light-scattering properties through changes in particle shape, size, and refractive index. Most techniques used to analyze ambient aerosol particles do not have the ability to view both solid and liquid phases within individual particles. Using a transmission electron microscope fitted with an environmental cell (ETEM), we analyzed laboratory-prepared and ambient aerosol samples. Our results suggest that solid inclusions inside aqueous droplets at high RH values (e.g., >65%) are likely to be common in atmospheric particles. In order to assess the effects of such inclusions, we calculated their combined lightscattering efficiencies using a discrete dipole approximation (DDA). The results show differences compared to those from a core-shell model, with an average increase in light scattering of ∼20%. The results demonstrate that the combination of ETEM measurements of ambient particles with DDA calculations yields new insights into the effects of inclusions on the light-scattering properties of internally mixed particles.

show abstract

Section: Introductionmentioning

confidence: 99%

Internally mixed atmospheric aerosol particles: Hygroscopic growth and light scattering

2010

View full text Add to dashboard Cite

show abstract

“…For simplicity, we assume that both metal and dielectric particles have the same depolarization factor L along the external applied field. In this regard, we can generalize Bruggeman type effective medium approximation [17] to evaluate the effective linear dielectric constant [20,21],…”

Section: Formalismmentioning

confidence: 97%

Effective medium approximation for optical bistability in nonlinear metal-dielectric composites

Gao

Huang³

2004

Solid State Communications

View full text Add to dashboard Cite

“…where ex , ey and ez are the three components of the effective permittivity tensor ↔ e , given by the self-consistent equation [12,13] …”

Section: Tunable Negative Refraction In the Metal-dielectric Compmentioning

confidence: 99%

Tunable negative refraction and subwavelength imaging in the metal-dielectric composites of nonspherical particles

Shi

Gao

2006

2006 International Symposium on Biophotonics, Nanophotonics and Metamaterials

View full text Add to dashboard Cite

The metal-dielectric composite, in which the metallic spheroidal nanoparticles are all identically aligned with their principal axes, is proposed to realize the tunable negative refraction by the adjustment of the metallic particles. We focus on the negative fraction case that ex > 0, ez < 0. Tunable slab lenses based on such composites are helpful to realize subwavelength imaging. We aim at the effects of the shape of the nanoparticles on the subwavelength imaging resolution. In addition, the shape of the particles is easy to be changed by applying an external electric field, and thus the tunable lenses from the shape-dependent composites can be realized in practice.

show abstract

The Influence of Particle Shape on Nonlinear Optical Properties of Metal-Dielectric Composites

Cited by 27 publications

References 17 publications

Internally mixed atmospheric aerosol particles: Hygroscopic growth and light scattering

Internally mixed atmospheric aerosol particles: Hygroscopic growth and light scattering

Effective medium approximation for optical bistability in nonlinear metal-dielectric composites

Tunable negative refraction and subwavelength imaging in the metal-dielectric composites of nonspherical particles

Contact Info

Product

Resources

About