A wide-angle shift-free metamaterial filter design for anti-laser striking application

Monks, James N.; Yue, Liyang; Yan, Bing; Aldred, Barrie; Hurst, Andrew; Wang, Zengbo

doi:10.1016/j.optcom.2018.07.065

Cited by 13 publications

(10 citation statements)

References 48 publications

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“…Such a beating-free oscillatory nature in the spectrum indicates a high repeatability of the growth process for all the GZO oxide layers of the S0 multilayer in both thickness and structure. It can be noticed that adjusting the optical properties of multilayer structures by a certain optimization of the thicknesses of oxide and metal interlayers makes it possible to use such structures for antilaser striking (optical filters) and laser-induced THz radiation source applications [32,33].…”

Section: Resultsmentioning

confidence: 99%

Structural, optical and magnetic properties of a dilute magnetic semiconductor based on Ga-doped ZnO and Co

Асваров¹,

Буташин²,

Kanevsky³

et al. 2020

Semicond. Sci. Technol.

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A wide bandgap oxide/transition metal multilayered structure, consisting of four submicron-thick Ga-doped ZnO layers and three ultrathin Co metal layers, is studied to highlight the induction of room temperature ferromagnetism (RTFM), a fundamental outcome of investigations dealing with dilute magnetic semiconductors and multiferroic materials. A comprehensive study including the structural, optical and magnetic properties of both as-deposited and high-temperature annealed samples is described. Optical transmittance spectroscopy and x-ray diffraction measurements confirm the conversion of the layered structure into a solid-state solution of Co within the Ga-doped ZnO after annealing. The study discloses RTFM in the as-deposited state due to nonoxidized metal components within the multilayer structure.

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Section: Resultsmentioning

confidence: 99%

Structural, optical and magnetic properties of a dilute magnetic semiconductor based on Ga-doped ZnO and Co

Асваров¹,

Буташин²,

Kanevsky³

et al. 2020

Semicond. Sci. Technol.

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“…Traditionally, thin film dielectric stacks have formulated the solution for filtering light in a multitude of fashions [20] . However, in recent years it has been shown that optical metamaterials could also provide a solution for filtering light [21] . Dielectric thin film filters are an excellent technology that will not be surpassed with ease.…”

Section: Applicationsmentioning

confidence: 99%

“…The strong electric and magnetic responses lead to an impedance mismatch and angular stability and can be driven by absorption [21] . Therefore, the requirement to engineer nanoparticles absorption responses become necessary to solve such solutions and to formulate the metamaterials building blocks.…”

Section: Applicationsmentioning

confidence: 99%

Nanoengineering instrumentation to control the optical properties of plasmonic nanoparticles for thin film optics

Monks

Hurst²,

Wang

2022

Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XIX

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Plasmonic nanoparticles are desirable for a wide range of applications and act as the base nano-building blocks for thin film optics and optical metamaterials. The properties and applicability of plamsonic materials are considerably influenced by their size, shape, charge, and agglomeration, all of which contribute to their optical properties. There is a range of top-down and bottom-up engineering processes now available for synthesizing these nanomaterials. However, the majority of current fabrication methods are thermally based which give rise to broad particle polydispersity and require strong reducing agents. Our research has developed a new nanoengineering instrument that is capable of synthesizing plasmonic nanoparticles to a desired optical specification. This novel synthesizing method provides excellent spatial and temporal control, avoids harmful strong reducing agents, and can be synthesis at room temperature. The underlying technology functionalizes seed nanoparticles and utilizes a photochemical reaction to activate the higher order plasmon modes from a seed nanoparticle solution to finely tailor the morphology of the nanoparticles in order to provide a desired optical response. This is achieved through intramolecular α-hydrogen abstraction of arylcycloalkyl ketones through the Norrish type II reaction. The end product yields a colloidal solution with optical properties that have been tuned and tailored by pure spectral radiation. Utilizing this technology could enable a manufacturing route for optical metamaterial building blocks in a repeatable and reliable fashion that assist hierarchical assembly techniques.

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“…This in turn creates further problems through reduced visibility (decrease in transmission) and high coloration. Therefore, it has become highly desirable to find a solution that is capable of combating the limits found in standard thin-film technology [4].…”

Section: Introductionmentioning

confidence: 99%

Shift-free fixed-line laser protection filter technology

Monks

Williams²,

Hurst³

et al. 2020

Technologies for Optical Countermeasures XVII; And High-Power Lasers: Technology and Systems, Platforms, Effects IV

Self Cite

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The development of shift-free fixed-line filters is a key technology for advancing the next generation of laser protection and is greatly desired due to the increased threat of laser attacks. Thin-film interference coatings have remained the key technology for achieving narrow bandstop filters for protection against laser light since the late 1970s. This paper presents the latest developments in fixed-line laser technology and introduces a metamaterial solution to mitigate the angular shift found in thin-film interference coatings. The metamaterial coating consists of metallic nano-particles periodically distributed within a non-absorbing dielectric material with a specific refractive index that enables the desired plasmonic resonance to exist at wavelengths that match that of the lasers. Due to the nano-particle size, the metamaterial layer can be treated as an individual homogeneous layer with properties described by an effective Drude-Lorentz approximation model. Unlike standard interference coatings where the effective index of the stack decreases with larger angles of incidence, the metamaterial's effective index remains relatively fixed with increasing angles resulting in the narrow bandstop function remaining shift-free.

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A wide-angle shift-free metamaterial filter design for anti-laser striking application

Cited by 13 publications

References 48 publications

Structural, optical and magnetic properties of a dilute magnetic semiconductor based on Ga-doped ZnO and Co

Structural, optical and magnetic properties of a dilute magnetic semiconductor based on Ga-doped ZnO and Co

Nanoengineering instrumentation to control the optical properties of plasmonic nanoparticles for thin film optics

Shift-free fixed-line laser protection filter technology

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