Angular correlation functions of light scattered from weakly rough metal surfaces

West, C. S.; O’Donnell, K. A.

doi:10.1103/physrevb.59.2393

Cited by 21 publications

(14 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The C 1 and C 10 correlations have been measured very recently in the scattering of p-polarized light from a one-dimensional, randomly rough, gold surface [25]. The roughness of the surface was characterized either by a Gaussian power spectrum of the form gjkj p p a exp Àa 2 k 2 a4, where a is the transverse correlation length, or by a West-O'Donnell power spectrum [26] given by gjkj pQjkj À k min Qk max À jkja k max À k min , where Qz is the Heaviside unit step function.…”

Section: Angular Intensity Correlationsmentioning

confidence: 99%

Multiple-Scattering Phenomena in the Scattering of Light from Randomly Rough Surfaces

Maradudin¹

1999

phys. stat. sol. (a)

View full text Add to dashboard Cite

The incorporation of multiple scattering into theories of rough surface scattering has led to the prediction of a number of new effects, many of which have now been verified experimentally. Several of these new multiple‐scattering effects will be described in this paper, in particular the presence of satellite peaks in the angular dependence of light scattered from, or transmitted through, films whose illuminated surface is randomly rough; new features in the angular intensity correlation functions of light scattered from randomly rough metal surfaces, and surfaces that scatter light uniformly within a specified range of scattering angles, and produce no scattering outside this range. In addition, some suggestions for directions that research in the area of rough surface scattering could take in the next few years will be presented.

show abstract

Section: Angular Intensity Correlationsmentioning

confidence: 99%

Multiple-Scattering Phenomena in the Scattering of Light from Randomly Rough Surfaces

Maradudin¹

1999

phys. stat. sol. (a)

View full text Add to dashboard Cite

show abstract

“…Diffuse reflectors are used in numerous applications such as the back‐lit units of liquid crystal display panels (LCD) to enable uniform distribution of light, light emitting diodes (LED) to enhance light extraction efficiency, solar cell devices to increase light trapping, and in coatings to reduce gloss. Surfaces with controlled roughness at the air/film interface can control diffuse reflection by omnidirectional scattering of light . This concept has been realized via fabrication of diffuse reflectors through vacuum deposition of metals, as well as via 3D lithography techniques .…”

Section: Introductionmentioning

confidence: 99%

“…

at the air/film interface can control diffuse reflection by omnidirectional scattering of light. [9][10][11][12] This concept has been realized via fabrication of diffuse reflectors through vacuum deposition of metals, [13] as well as via 3D lithography techniques. [14] Similarly, surface-roughened nanostructures can enhance the efficiency of light extraction in LED devices.

…”

mentioning

confidence: 99%

Specular and Diffuse Reflectance of Phase‐Separated Polymer Blend Films

Nallapaneni

Shawkey

Karim

2017

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Diffuse reflectors have various applications in devices ranging from liquid crystal displays to light emitting diodes, to coatings. Herein, specular and diffuse reflectance from controlled phase separation of polymer blend films, a well-known self-organization process, are studied. Temperature-induced spinodal phase separation of polymer blend films in which one of the components is selectively extracted is shown to exhibit enhanced surface roughness as compared to unextracted films, leading to a notable increase of diffuse reflectance. Diffuse reflectance of UV-visible light from such selectively leached phase-separated blend films is determined by a synergy of varying lateral scale of phase separation (≈200 nm to 1 μm) and blend film surface roughness (0-40 nm). These critical parameters are controlled by tuning annealing time (0.5-3 h) and temperature (140, 150, 160 °C) of phase separation. Angle-resolved diffuse reflection studies show that the surface-roughened polymer films exhibit diffuse reflectance up to 40° from normal incident light in contrast to optically uniform as-cast films that exhibit largely specular reflectance. Furthermore, the intensity of the diffusively reflected light can be enhanced (300-700 nm) or reduced (220-300 nm) significantly by coating the leached phase-separated films with a thin silver over layer.

show abstract

“…A uniform surface with a controlled surface roughness reflects incident light in a diffusive manner and reduces specular reflection by randomly scattering light in all directions. [9][10][11][12] Controlling the ratio of specular and diffuse reflection is the most important aspect in the design of a diffuse reflector. Specific applications may require different ratios of specular and diffuse reflectance.…”

Section: Introductionmentioning

confidence: 99%

Control of Specular and Diffuse Reflection of Light Using Particle Self‐Assembly at the Polymer and Metal Interface

Ahn¹,

Hendricks²,

Lee³

2007

Adv Funct Materials

View full text Add to dashboard Cite

We present a novel method of controlling the specular and diffuse reflection of light by the electrostatic deposition of a spherical particle monolayer followed by electroless plating. Charged polystyrene colloidal particles, ranging in size from 100 nm to 5 μm, were adsorbed from solution onto oppositely charged polyelectrolyte multilayers (PEM). The monodisperse particle monolayers were coated with nickel in a two‐step electroless plating process using palladium catalysts. These surfaces can be used as diffusive metal reflectors with a uniformly controlled surface roughness due to the uniform size of deposited particles. In addition, the self‐assembled particles at the polymer and metal interface deflected the internal stresses that build‐up at the interface while the metal was being deposited. This allowed a thicker metal film to be deposited before delamination occurred. A UV‐VIS spectrometer with movable fiber optic cables was employed to characterize the optical properties of the reflectors. The optical fibers permit versatile and precise measurements of specular and diffuse reflectance. By measuring the angular dependent reflectance, we demonstrate how to estimate the distribution of reflected light from the nickel coated surface and how to calculate the ratio of specular and diffuse reflection in the total reflected light. Optical measurements of our nickel samples showed that this approach could be used to control the portion of diffuse reflection from 8.25 to 59.97 %. Additionally, a quartz crystal microbalance was employed to study the electroless nickel plating rate on PEM. Our proposed method is simple, cost‐effective and convenient for mass production because the process consists of a series of simple immersion steps without vacuum technology or special equipment.

show abstract

Angular correlation functions of light scattered from weakly rough metal surfaces

Cited by 21 publications

References 46 publications

Multiple-Scattering Phenomena in the Scattering of Light from Randomly Rough Surfaces

Multiple-Scattering Phenomena in the Scattering of Light from Randomly Rough Surfaces

Specular and Diffuse Reflectance of Phase‐Separated Polymer Blend Films

Control of Specular and Diffuse Reflection of Light Using Particle Self‐Assembly at the Polymer and Metal Interface

Contact Info

Product

Resources

About