Implementation of generalized Harvey-Shack theory in light scattering from rough surfaces

Günöven, Mete; Nasser, Hisham; Ünal, Mustafa; Aytekin, O.; Turan, Raşit; Bek, Alpan

doi:10.1103/physreva.102.063521

Cited by 5 publications

(2 citation statements)

References 45 publications

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“…27 The Harvey−Shack scalar scattering theory 28 (HS-SST) linked the optical phase accumulation and statistical surface parameters, such as roughness and autocorrelation function, for a given surface topography. Recently, Gunoven et al 29 modeled HS-SST for angular intensity distribution studies, utilizing the height profile data and refractive indices from isotropic textured surfaces. Thus, with the help of background studies, it was proven that there is an existence of correlation between the surface roughness and optical characteristics of a material.…”

Section: Introductionmentioning

confidence: 99%

Investigations on Optical Absorption and the Pyro-phototronic Effect with Selectively Patterned Black Silicon for Advanced Photodetection

Nataraj,

Mohanta,

Badhirappan

2024

ACS Appl. Mater. Interfaces

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A novel property existing in the stain-etching technique that eliminates the need for expensive etchant masks in the texturization process of silicon wafers was identified. Through the combination of grayscale lithography and stainetching methodologies, selective patterning of silicon with AR-P 3510 T, a positive-photoresist mask, was carried out. The etch area ratio was varied in nine different patterns of various feature sizes ranging from 400 to 1500 μm. The optical characteristics of the patterned substrates were determined from diffuse reflectance spectroscopy analysis, and the results were supported with finitedifference time-domain simulations. Complimenting the improvement in optical properties, the electrical losses in microwellpatterned photodetector devices have been reduced with an electro-optic optimum value of the surface enhancement factor, γ. The photodetecting efficiency of a selectively patterned microwell photodetector device exceeded the planar and black silicon photodetector devices with a considerable improvement in the pyrophototronic effect. This work suggests an alternative for black silicon optoelectronic devices providing a new route to fabricate selectively patterned substrates with an achieved detectivity 16-and 20-fold higher than black and planar silicon photodetector devices, respectively.

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Section: Introductionmentioning

confidence: 99%

Investigations on Optical Absorption and the Pyro-phototronic Effect with Selectively Patterned Black Silicon for Advanced Photodetection

Nataraj,

Mohanta,

Badhirappan

2024

ACS Appl. Mater. Interfaces

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“…Surface scattering phenomena is an important topic in diverse areas of science and engineering, especially in optical applications [1][2][3][4]. Researchers have investigated the prediction of the scattered light distribution from random rough surfaces and proposed various theories and methods [5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Harvey–Shack theory for a converging–diverging Gaussian beam

Hansen²,

wang

et al. 2023

J. Opt. Soc. Am. B

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The scattering characteristics of random rough surfaces illuminated with a 3D converging–diverging Gaussian beam are investigated by applying the conventional Harvey–Shack theory in conjunction with 2D plane-wave decomposition. The Gaussian beam is assumed to have an arbitrary angle of incidence and to be linearly s-polarized. Using data obtained from laser BRDF measurements on isotropic random rough surfaces with low surface roughness, we demonstrate that the Gaussian beam Harvey–Shack theory is in better accordance with the experimental data than the conventional Harvey–Shack theory. The two models become identical for a large beam waist radii but are significantly different for smaller ones.

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