Aluminium metal–insulator–metal structure fabricated by the bottom-up approach

Watanabe, Rie; Mita, Mai; Okamoto, Takayuki; Isobe, Toshihiro; Nakajima, Akira; Matsushita, Sachiko

doi:10.1039/d0na00082e

Cited by 7 publications

(3 citation statements)

References 37 publications

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“…But these techniques require complicated procedures, e.g., nanoscale lithography. Recently, structural color preparation by asymmetric Fabry−Perot type structures is also proposed [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. The advantage of these F-P cavity structures is it does not require nano-patterning to fabricate colors.…”

Section: Introductionmentioning

confidence: 99%

Structural Colors on Al Surface via Capped Cu-Si3N4 Bilayer Structure

et al. 2023

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Tunable structural colors have a multitude of applications in the beautification of mobile devices, in the decoration of artwork, and in the creation of color filters. In this paper, we describe a Metal-Insulator-Metal (MIM) design that can be used to systematically tune structural colors by altering the thickness of the top metal and intermediate insulator. Cu and Si3N4 were selected as the top metal and intermediate insulator layers, respectively, and various reflection colors were printed on Al. To protect the Cu surface from scratchiness and oxidation, a number of capping layers, including SiO2, LPSQ, PMMA, and the commercially available clear coat ProtectaClear, were applied. In addition to their ability to protect Cu from a humid environment without deteriorating color quality, ProtectaClear and LPSQ coatings have minimal angle dependency. Furthermore, a bilayer of PMMA/SiO2 can protect the Cu surface from the effects of humidity. In addition, the PMMA/SiO2 and ProtectaClear/SiO2 bilayers can also protect against corrosion on the Cu surface. The colors can be tuned by controlling the thickness of either the metal layer or intermediate insulator layer, and vivid structural colors including brown, dark orange, blue, violet, magenta, cyan, green-yellow, and yellow colors can be printed. The measured dielectric functions of Cu thin films do not provide any evidence of the plasmonic effect, and therefore, it is expected that the obtained colors are attributed to thin-film interference.

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Section: Introductionmentioning

confidence: 99%

Structural Colors on Al Surface via Capped Cu-Si3N4 Bilayer Structure

et al. 2023

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“…Also, it is biodegradable, biocompatible and non-toxic. [14][15][16][17][18] Ch is only dissolved in acids, and thus it has very limited applications because of its poor water solubility. Ch was chemically modied to form a water-soluble derivative, denoted as N-quaternized chitosan (NQC) [19][20][21][22][23] (Fig.…”

Section: Introductionmentioning

confidence: 99%

One-pot green synthesis of antimicrobial chitosan derivative nanocomposites to control foodborne pathogens

et al. 2022

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“…When metals are used, the resonator is usually defined as a metaldielectric-metal (MDM) system, widely employed in frontiers research areas associated to nanotechnology, such as plasmonics and metamaterials. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] A metamaterial response is achieved in the quasi-static regime, namely a regime in which the size of the layers is far smaller than the wavelength, [28] while a resonant behavior arises if the thickness of the cavity is comparable to the considered wavelength. [1,29] In this latter case, the MDM structure can be described with the FP formalism.…”

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confidence: 99%

Strong Light–Matter Interaction and Spontaneous Emission Reshaping via Pseudo‐Cavity Modes

Patra

Caligiuri

Krahne

et al. 2021

Advanced Optical Materials

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Well beyond the application frameworks in which these systems find place as devices, the basic concepts that govern FP resonators constitute the starting point from which a new look over a variety of phenomena can be thrown. For example, the framework of the Fabry-Perot interferometry has been fruitfully conceptualized in quantum physics, [6][7][8] while Fabry-Perot-resonances-based theories have been employed to explain phenomena like Klein backscattering and tunneling, [9,10] or as an innovative platform for Metal-Organic-Framework (MOF) chemical sensing, and in metrology. [11] In its basic form, an optical resonator requires the presence of two reflective elements (mirrors) separated by a transparent layer. [1] The main role of the two mirrors is to fix a peculiar symmetry to the waves allowed to travel within the cavity, by forcing their modulus to be very close to zero on both of them. Waves traveling within the resonator are, therefore, standing waves. In this context, the fundamental laws governing the resonators can be straightforwardly derived together with all their characteristic parameters (quality factor, finesse, free-spectral-range, etc.).The materials of choice for the mirrors can be either dielectrics, as in the case for the so-called etalons, or metallics. When metals are used, the resonator is usually defined as a metaldielectric-metal (MDM) system, widely employed in frontiers research areas associated to nanotechnology, such as plasmonics and metamaterials. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] A metamaterial response is achieved in the quasi-static regime, namely a regime in which the size of the layers is far smaller than the wavelength, [28] while a resonant behavior arises if the thickness of the cavity is comparable to the considered wavelength. [1,29] In this latter case, the MDM structure can be described with the FP formalism. MDM resonators have been recently found to be able to steer and polarize the spontaneous emission of embedded fluorophores, [30] a task that is usually accomplished by engineering specific sophisticated quantum optical diodes or, even, nonlinear elements. [31,32] Their straightforward fabrication, high quality factor (Q), and small modal volume, makes MDM systems often the first choice in light-matter quantum-electrodynamics experiments, where high Q resonances are needed to investigate the atomcavity interaction regime. [33][34][35][36][37][38][39] It is however true that, in order to optimize the quality factor of an MDM Fabry-Perot resonator, the thickness of the metallic mirrors has to be kept significantly Strong light-matter interaction is usually achieved by embedding a gain medium in a high-quality (Q)-factor cavity made with thick external mirrors. The high reflectivity of the mirrors poses, therefore, a trade-off between pump radiation coupling efficiency and high Q-factor, thus preventing the use of optical cavities in photonic contexts where the photosensitive element necessitates to be readily accessible. Here, this long-s...

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Aluminium metal–insulator–metal structure fabricated by the bottom-up approach

Abstract: Wide Al MIM nanostructures can be fabricated by bottom-up process.

Cited by 7 publications

References 37 publications

Structural Colors on Al Surface via Capped Cu-Si3N4 Bilayer Structure

Structural Colors on Al Surface via Capped Cu-Si3N4 Bilayer Structure

One-pot green synthesis of antimicrobial chitosan derivative nanocomposites to control foodborne pathogens

Strong Light–Matter Interaction and Spontaneous Emission Reshaping via Pseudo‐Cavity Modes

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