Light scattering from thin films with an oblique columnar structure and with granular inclusions

Kassam, Samer; Hodgkinson, Ian J.; Wu, Qi; Cloughley, Sarah

doi:10.1364/josaa.12.002009

Cited by 12 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10.200] at 01:17 01 December 2014 scattering may occur due to the bulk inhomogeneity, giving rise to an increase in σ and a reduction in the generalized specularity. Kassam and Hodgkinson [43] also pointed out the polarization-dependent roughness of a thin film consisting of columnar structures. The use of the generalized specularity model in Eq.…”

Section: Directional-hemispherical Reflectance and The Scattering Effectmentioning

confidence: 98%

“…This can be attributed to the asymmetric grating profile of sample 1, which resulted in more light scattered to the direction with 90 • < φ < 180 • , as can be seen from Figures 8a and 8b with higher BRDF magnitudes for cases of φ r = 135 • (hollow black circles) and 180 • (hollow red diamonds). Some of the features in the diffuse component may be attributed to anisotropic diffraction and need to be further studied [43]. However, challenges exist in how to quantitatively distinguish bulk scattering from surface scattering in this hybrid micro/nanostructured system [42][43][44].…”

Section: Directional-hemispherical Reflectance and The Scattering Effectmentioning

confidence: 99%

“…Some of the features in the diffuse component may be attributed to anisotropic diffraction and need to be further studied [43]. However, challenges exist in how to quantitatively distinguish bulk scattering from surface scattering in this hybrid micro/nanostructured system [42][43][44].…”

Section: Directional-hemispherical Reflectance and The Scattering Effectmentioning

confidence: 99%

See 2 more Smart Citations

Anisotropic Diffraction from Inclined Silver Nanorod Arrays on Grating Templates

Wang

Haider

Abell

et al. 2012

Nanoscale and Microscale Thermophysical Engineering

View full text Add to dashboard Cite

Inclined silver nanorods (AgNRs) are highly anisotropic, with various applications in energy conversion, plasmonic and photonic devices, and sensing. So far, related studies have focused on the reflection or transmission, whereas studies on the diffraction and scattering from anisotropic AgNRs are still lacking. We investigate the anisotropic radiative properties of novel micro/nanoscale hybrid structures of inclined AgNRs deposited on compact disk (CD) gratings, which were fabricated with an oblique angle deposition technique. The reflectance of each diffraction peak and directional-hemispherical reflectance are characterized with a laser scatterometer and an integrating sphere, respectively, for both polarizations at a wavelength of 635 nm. The ordinary and extraordinary optical constants predicted from the effective medium theory (EMT) are incorporated into a rigorous coupled-wave analysis (RCWA) algorithm to estimate the diffraction efficiencies. The effect of scattering (mainly due to surface roughness) is also examined. The result shows that the orientation of the tilted nanorods with respect to the direction of grooves has a significant effect on both the energy distribution of the diffraction rays and the angular distribution of the scattered light for different polarizations. Such a hybrid structure may offer an alternative solution to engineering the radiative properties of a surface.

show abstract

Section: Directional-hemispherical Reflectance and The Scattering Effectmentioning

confidence: 98%

Section: Directional-hemispherical Reflectance and The Scattering Effectmentioning

confidence: 99%

See 1 more Smart Citation

Anisotropic Diffraction from Inclined Silver Nanorod Arrays on Grating Templates

Wang

Haider

Abell

et al. 2012

Nanoscale and Microscale Thermophysical Engineering

View full text Add to dashboard Cite

show abstract

“…However, nanostructured media can scatter significantly [11], thereby reducing the effectiveness of the DPR caused by increased amplitude modulation at the target [12]. Analyzing that scatter can be quite complicated because the average medium is anisotropic and the scatterers themselves are highly anisotropic.…”

Section: Introductionmentioning

confidence: 99%

“…Kassam, et al , developed a theory for scattering by a film having a tilted columnar structure [11]. This theory successfully describes the qualitative nature of the scattering.…”

Section: Introductionmentioning

confidence: 99%

Polarized optical scattering by inhomogeneities and surface roughness in an anisotropic thin film

et al. 2017

View full text Add to dashboard Cite

We extend the theory of Kassam et al. [J. Opt. Soc. Am. A 12, 2009 (1995)] for scattering by oblique columnar structure thin films to include the induced form birefringence and the propagation of radiation in those films. We generalize the 4 × 4 matrix theory of Berreman [J. Opt. Soc. Am. 62, 502 (1972)] to include arbitrary sources in the layer, which are necessary to determine the Green function for the inhomogeneous wave equation. We further extend first-order vector perturbation theory for scattering by roughness in the smooth surface limit, when the layer is anisotropic. Scattering by an inhomogeneous medium is approximated by a distorted Born approximation, where effective medium theory is used to determine the effective properties of the medium and strong fluctuation theory is used to determine the inhomogeneous sources. In this manner, we develop a model for scattering by inhomogeneous films, with anisotropic correlation functions. The results are compared to Mueller matrix bidirectional scattering distribution function (BSDF) measurements for a glancing-angle de-position (GLAD) film. While the results are applied to the GLAD film example, the development of the theory is general enough that it can guide simulations for scattering in other anisotropic thin films.

show abstract

Glancing Angle Deposition Optical Films

Hawkeye

Taschuk

Brett

2014

Glancing Angle Deposition of Thin Films

View full text Add to dashboard Cite

Light scattering from thin films with an oblique columnar structure and with granular inclusions

Cited by 12 publications

References 29 publications

Anisotropic Diffraction from Inclined Silver Nanorod Arrays on Grating Templates

Anisotropic Diffraction from Inclined Silver Nanorod Arrays on Grating Templates

Polarized optical scattering by inhomogeneities and surface roughness in an anisotropic thin film

Glancing Angle Deposition Optical Films

Contact Info

Product

Resources

About