Deep Ultraviolet Plasmon Resonance in Aluminum Nanoparticle Arrays

Maidecchi, Giulia; Gonella, Grazia; Zaccaria, Remo Proietti; Moroni, R.; Anghinolfi, Luca; Giglia, Angelo; Nannarone, Stefano; Mattera, L.; Dai, Hai‐Lung; Canepa, M.; Bisio, Francesco

doi:10.1021/nn400918n

Cited by 174 publications

(166 citation statements)

References 67 publications

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“…Prism coupling creates an evanescent wave owing to total internal reflection at the PI-air interface, strongly reducing interfacial background scattering, but does not occur at the substrate-PI interface. Although diffractive coupling in nanostructure arrays typically is studied using normal incidence (18,(31)(32)(33), it can also be achieved using the off-normal angles of incidence used here (28,(34)(35)(36)(37). Images were obtained by mounting a digital single-lens reflex (DSLR) camera into the eyepiece of the microscope; spectra were obtained by directing the signal toward a CCD camera attached to a spectrograph.…”

Section: Resultsmentioning

confidence: 99%

Vivid, full-color aluminum plasmonic pixels

Olson

Manjavacas

Liu

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

283

255

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Aluminum is abundant, low in cost, compatible with complementary metal-oxide semiconductor manufacturing methods, and capable of supporting tunable plasmon resonance structures that span the entire visible spectrum. However, the use of Al for color displays has been limited by its intrinsically broad spectral features. Here we show that vivid, highly polarized, and broadly tunable color pixels can be produced from periodic patterns of oriented Al nanorods. Whereas the nanorod longitudinal plasmon resonance is largely responsible for pixel color, far-field diffractive coupling is used to narrow the plasmon linewidth, enabling monochromatic coloration and significantly enhancing the far-field scattering intensity of the individual nanorod elements. The bright coloration can be observed with p-polarized white light excitation, consistent with the use of this approach in display devices. The resulting color pixels are constructed with a simple design, are compatible with scalable fabrication methods, and provide contrast ratios exceeding 100:1.RGB | chromaticity | array | electron beam lithography D isplay technologies have been evolving toward vivid, fullcolor, flat-panel displays with high resolution and/or small pixel sizes, higher energy efficiency, and improved benefit/cost ratios. Some of the most popular current technologies are liquid crystal displays (LCD), laser phosphor displays, also known as electroluminescent displays, and light-emitting diode (LED)-based displays. A common characteristic of all color display technologies is the incorporation of various color-producing media, which can be inorganic, organic, or polymeric materials, into the device. These chromatic materials are chosen to produce the fundamental components of the color spectrum in additive color schemes such as the standard red-green-blue (sRGB) when illuminated by an internal light source or when an electrical voltage is applied.Inorganic chromatic materials have the potential to greatly extend the durability and lifetime of color displays. Inorganic nanoparticles have recently begun to be used in color displays in the form of quantum dot LEDs, which have excellent display lifetimes and industry-scalable, size-based, and material-based color tunability (1-3). However, obtaining blue colors from quantum dots has been challenging (4) owing to the requirement of synthesizing nanoparticles in the small size range required to achieve optical transitions in this wavelength range. Au nanoparticles can produce green and red colors based on their surface plasmon resonances (5), but shorter-wavelength hues are quenched because of interband transitions for wavelengths below 520 nm (6). Ag has also been investigated for display applications (7, 8), but although spectral features can be achieved across the visible region the material readily oxidizes (9, 10), requiring additional passivation layers.Al is potentially a highly attractive material for plasmon-based full-spectrum displays. Al is the third most abundant element in the earth's crust, beh...

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Section: Resultsmentioning

confidence: 99%

Vivid, full-color aluminum plasmonic pixels

Olson

Manjavacas

Liu

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

283

255

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“…[[qv: 20a,24]] However, other metallic materials (including Cu,25 Al,26 and Mg27) are often overlooked, despite favorable optical properties, due to their inherent instability in air and water. In particular, Cu is highly conductive, and could represent a cost‐effective replacement for Au in plasmonic, photovoltaic, and catalytic applications,28 but its use is limited as it oxidizes quickly.…”

Section: Resultsmentioning

confidence: 99%

Corrosion‐Protected Hybrid Nanoparticles

et al. 2017

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Nanoparticles composed of functional materials hold great promise for applications due to their unique electronic, optical, magnetic, and catalytic properties. However, a number of functional materials are not only difficult to fabricate at the nanoscale, but are also chemically unstable in solution. Hence, protecting nanoparticles from corrosion is a major challenge for those applications that require stability in aqueous solutions and biological fluids. Here, this study presents a generic scheme to grow hybrid 3D nanoparticles that are completely encapsulated by a nm thick protective shell. The method consists of vacuum‐based growth and protection, and combines oblique physical vapor deposition with atomic layer deposition. It provides wide flexibility in the shape and composition of the nanoparticles, and the environments against which particles are protected. The work demonstrates the approach with multifunctional nanoparticles possessing ferromagnetic, plasmonic, and chiral properties. The present scheme allows nanocolloids, which immediately corrode without protection, to remain functional, at least for a week, in acidic solutions.

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“…The systems were fully fabricated in high vacuum (pressure <1·10 −8 mbar) by means of template-driven metal deposition and dewetting 25,26 . First, an insulating nanopatterned substrate was prepared by homoepitaxial growth of 240 nm of LiF on LiF(110) single crystals 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 5 (Crystec Gmbh, Berlin, Germany) at T=570 K, leading to a regular ridge-valley surface nanomorphology, where flat crystal facets forming an angle of 45° with the surface normal are formed with periodicity Λ= (27±5) nm ( Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Then Ag was deposited as a thickness counterwedge with equivalent coverage from 2.3 nm to 0 (Fig. 1(c), the uncertainty in metal coverage is 25,26 (Fig. 1(d)).…”

Section: Methodsmentioning

confidence: 99%

Plasmonic Color-Graded Nanosystems with Achromatic Subwavelength Architectures for Light Filtering and Advanced SERS Detection

Zaccaria

Bisio

Das

et al. 2016

ACS Appl. Mater. Interfaces

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Plasmonic colour-graded systems are devices featuring a spatially variable plasmonic response over their surface. They are widely used as nanoscale colour filters; their typical size is small enough to allow integration with miniaturized electronic circuits paving the way to realize novel nanophotonic devices. Currently, most plasmonic colour-graded systems are intrinsically discrete, as their chromatic response exploits the tailored plasmon resonance of micro-architectures characterized by different size and/or geometry for each target colour.Here we report the realization of multifunctional plasmon-graded devices where continuouslygraded chromatic response is achieved by smoothly tuning the composition of the resonator material while simultaneously maintaining an achromatic nanoscale geometry. The result is a new class of versatile materials: we show their application as plasmonic filters with a potential pixel size smaller than half of the exciting wavelength, but also as multiplexed surface-enhanced Raman spectroscopy (SERS) substrates. Many more implementations, like photovoltaic efficiency boosters or colour routers await, and will benefit from the low fabrication cost and intrinsic plasmonic flexibility of the presented systems.

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Deep Ultraviolet Plasmon Resonance in Aluminum Nanoparticle Arrays

Cited by 174 publications

References 67 publications

Vivid, full-color aluminum plasmonic pixels

Vivid, full-color aluminum plasmonic pixels

Corrosion‐Protected Hybrid Nanoparticles

Plasmonic Color-Graded Nanosystems with Achromatic Subwavelength Architectures for Light Filtering and Advanced SERS Detection

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