Very low-refractive-index optical thin films consisting of an array of SiO_2 nanorods

Xi, Jinghui; Kim, Jong Kyu; Schubert, E. Fred; Ye, Dexian; Lu, Toh‐Ming; Lin, Shawn‐Yu; Juneja, Jasbir S.

doi:10.1364/ol.31.000601

Cited by 102 publications

(42 citation statements)

References 10 publications

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“…It is worth to note that the use of proposed nano-structure for media with such extreme magnitudes of optical constants is validated, for example, for antireflection of ferroelectrics and semiconductors in infrared and microwave regions where the creation of homogeneous coatings is complicated. Also, it is possible to create antireflection coating for artificial media with refractive index close to one [27]. According to general theory of antireflection coatings [24], the refractive index of antireflecting coating in this case should be even closer to the vacuum value that obviously does not allow to use any natural dielectric for these purposes.…”

Section: Discussionmentioning

confidence: 99%

Approximate Model for Universal Broadband Antireflection Nano-Structure

Shalin¹,

Никитов²

2013

PIER B

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Abstract-In this work, we investigate the effect of broadband antireflection of a medium by a layer of embedded nano-cavities arranged near the surface. It is shown that this structure is versatile and allows near 100% transmittance in a wide spectral range practically for any dielectric material. The approximate model of nano-structured layer is suggested that allows to determine the parameters of the system necessary for achieving antireflection of any a priori given media without complicated numerical calculations. The transmission spectrum of a medium modified by such a structure is entirely defined by a radius and a depth of bedding of the nano-porous layer.

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Section: Discussionmentioning

confidence: 99%

Approximate Model for Universal Broadband Antireflection Nano-Structure

Shalin¹,

Никитов²

2013

PIER B

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“…One possible application of this effect is the engineering of antireflection coatings for existing artificial media with a refractive index close to unity [43].…”

Section: Discussionmentioning

confidence: 99%

Optical Antireflection of a Medium by Nanostructural Layers

Shalin¹

2011

PIER B

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Abstract-This work examines reflection of a light from a semiinfinite medium which is modified with an ordered monolayer of spherical nanoparticles placed on or under its surface. We derive analytical expressions for the electric fields within and outside such structures and verify them with help of strict numerical simulations. We show that nanoparticles layer acts as an imaginary zero-thickness surface having complicated non-Fresnel reflection coefficients with wavelength dependent phase shift. It is shown that such monolayers may reduce reflection relative to reflection from a pure substrate surface. We derive and analyse a zero-reflection condition in the simple intuitive form. It is shown that a single layer of nanocavities near the medium-vacuum interface may increase the transparency of a dielectric medium to values close to 100% in a wide wavelength range.

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“…These narrow band rugate filters have potential applications in laser applications and protective goggles. Colour AR coatings fabricated by magnetron sputtering have potential application in architecture and cement industry [96] . One can easily generate highly porous and different nanostructures by optimizing fabricating parameters.…”

Section: Physical Vapour Deposition (Pvd)mentioning

confidence: 99%

A Mini Review: Antireflective Coatings Processing Techniques, Applications and Future Perspective

Khan¹,

Wu²,

Pan³

et al. 2017

Res. Rev. J Mat. Sci

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Antireflective coatings (AR) are widely applied to eliminate the unwanted surface reflections from the AR coated substrate. In different optoelectronic devices, AR coatings have potential usage in photovoltaic solar cells, sensors, display devices, automobile industries to reduce reflectance, glare and enhance light transmittance. Natural phenomenon inspires researchers, and they generate bionic AR coatings copying the nature such as moth eyes, or cicada wings to fabricate efficient light harvesting AR coatings. In the current review article, we analyse and evaluate critically the progress and recent development in the fabrication of AR thin films comprising organic coatings, inorganic coatings, polymer AR coatings and bionic AR coatings. We predominantly emphasise the AR coatings fabrication by different methods and pinpoints the technological challenges in their real-world reliability. Finally, we address the future challenges and potential strategies for their upcoming prospect.

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Very low-refractive-index optical thin films consisting of an array of SiO_2 nanorods

Cited by 102 publications

References 10 publications

Approximate Model for Universal Broadband Antireflection Nano-Structure

Approximate Model for Universal Broadband Antireflection Nano-Structure

Optical Antireflection of a Medium by Nanostructural Layers

A Mini Review: Antireflective Coatings Processing Techniques, Applications and Future Perspective

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