Comparison of electromagnetically induced transparency between silver, gold, and aluminum metamaterials at visible wavelengths

Hokari, Ryohei; Kanamori, Yoshiaki; Hane, Kazuhiro

doi:10.1364/oe.22.003526

Cited by 48 publications

(25 citation statements)

References 35 publications

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“…Al is low in cost and compatible with mainstream manufacturing processes in the electronics industry (complementary metal-oxide semiconductor processing, known as CMOS) (12, 13). Al has recently been identified as a highly promising chromatic material for color filters, for instance using structures such as hole arrays (14-16) or arrays of Al crosses (17).Although the plasmon resonances of Al nanostructures typically have been studied in the UV region of the spectrum (18), they can also be tuned into the visible region (19,20), exhibiting a sensitivity to size and shape similar to Au and Ag nanostructures (21,22). The structural tuning of the Al plasmon resonance into the visible yields excellent blue colors, but as the resonance is red-shifted across the visible spectrum its linewidth broadens, primarily owing to the interband transition of Al that occurs at nominally 1.5 eV.…”

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confidence: 99%

“…Although the plasmon resonances of Al nanostructures typically have been studied in the UV region of the spectrum (18), they can also be tuned into the visible region (19,20), exhibiting a sensitivity to size and shape similar to Au and Ag nanostructures (21,22). The structural tuning of the Al plasmon resonance into the visible yields excellent blue colors, but as the resonance is red-shifted across the visible spectrum its linewidth broadens, primarily owing to the interband transition of Al that occurs at nominally 1.5 eV.…”

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confidence: 99%

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Vivid, full-color aluminum plasmonic pixels

Olson

Manjavacas

Liu

et al. 2014

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

279

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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mentioning

confidence: 99%

mentioning

confidence: 99%

Vivid, full-color aluminum plasmonic pixels

Olson

Manjavacas

Liu

et al. 2014

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

279

255

View full text Add to dashboard Cite

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“…Structures of optical metamaterials currently attracting attention include, for example, split ring resonators (SRRs) [67]- [72], fishnet structures [4], [73], [74], plasmonic structures (PSs) with Fano resonances [75]- [79], and electromagnetically induced transparency (EIT) metamaterials [80]- [88]. Typical structures of optical metamaterials are shown in Fig.…”

Section: B Typical Structuresmentioning

confidence: 99%

“…Verellen et al observed EITlike effects in gold metamaterials consisting of monomers and dimers at wavelengths around 780 nm [82]. Recently, Hokari et al successfully demonstrated planar EIT metamaterials operating at the visible wavelengths of 462, 514, and 647 nm [88].…”

Section: B Typical Structuresmentioning

confidence: 99%

MEMS for Plasmon Control of Optical Metamaterials

Kanamori

Hokari

Hane

2015

IEEE J. Select. Topics Quantum Electron.

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Metamaterials have attracted a great deal of attention as artificial electromagnetic materials having unique optical characteristics, and various innovative optical applications have been expected. Micro electromechanical systems (MEMS)-based reconfigurable metamaterials are candidate technologies for active optical control. In this paper, we focus on MEMS-based reconfigurable metamaterials operated in the optical region between visible and near-infrared wavelengths. A brief overview of static optical metamaterials and active optical metamaterials driven by MEMS actuators is presented. Moreover, points to be considered for a micromachining process of optical metamaterials are discussed with results of calculations.

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“…[13][14][15] Most EIT-like metamaterials were based on two kinds of resonant modes. 13,[16][17][18][19][20][21][22][23][24][25] One was a "bright mode," which had a highly radiative mode coupled to the propagating electromagnetic waves with a low Q-factor. The other was a "dark mode" with a high Q-factor, which could not be excited by the propagating waves directly, but by the "bright mode."…”

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confidence: 99%

Tailoring dual-band electromagnetically induced transparency in planar metamaterials

Yang

Han

et al. 2015

Journal of Applied Physics

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Articles you may be interested inActively bias-controlled metamaterial to mimic and modulate electromagnetically induced transparency Appl. Phys. Lett. 104, 261902 (2014); 10.1063/1.4886148Band split in multiband all-dielectric left-handed metamaterials Ultra-broadband electromagnetically induced transparency using tunable self-asymmetric planar metamaterials J.The transmission characteristics of a planar metamaterial, composed of two finite metal strips (with different length) and one double split-ring resonator, have been numerically and experimentally investigated in this paper. By varying the length of the two strips slightly, this structure can exhibit single-band and dual-band electromagnetically induced transparency (EIT)-like spectral response in microwave region. The dark mode can be excited because of the length difference of the two metal strips, which can lead to a very asymmetric Fano-like resonance or gradually EIT-like profile in transmission. So the dual-band EIT-like physical mechanism is characterized by two bright-dark coupling modes. Our work provides a way to obtain multiple EIT-like effect, and it may achieve potential applications in a variety of fields including filters, sensing, and some other microwave devices. V C 2015 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4906853] 043107-2 Hu et al.

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Comparison of electromagnetically induced transparency between silver, gold, and aluminum metamaterials at visible wavelengths

Cited by 48 publications

References 35 publications

Vivid, full-color aluminum plasmonic pixels

Vivid, full-color aluminum plasmonic pixels

MEMS for Plasmon Control of Optical Metamaterials

Tailoring dual-band electromagnetically induced transparency in planar metamaterials

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