Plasmonic band edge effects on the transmission properties of metal gratings

Ceglia, Domenico de; Vincenti, Maria Antonietta; Scalora, Michael; Aközbek, Neşet; Bloemer, Mark J.

doi:10.1063/1.3638161

Cited by 58 publications

(104 citation statements)

References 47 publications

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“…3,4,13,18 Among the various types, grating structure can be compact and robust, which are desirable characteristics for integration into other devices 6 apart from the tunability of the spectral response through geometrical parameters. [10][11][12][19][20][21] Especially, 1D grating can support waveguide, propagating SPPs and/or surface wave modes. 10,14,19 The grating parameters can be tuned to maximize any of the above modes, which may be featured in the optical properties.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][19][20][21] Especially, 1D grating can support waveguide, propagating SPPs and/or surface wave modes. 10,14,19 The grating parameters can be tuned to maximize any of the above modes, which may be featured in the optical properties. In the present report, we limit our interest to the asymmetric grating, 22 which supports leaky surface waves predominantly.…”

Section: Introductionmentioning

confidence: 99%

“…The asymmetric grating depicts minima in the reflection spectrum corresponding to the SPPs due to the interaction between longitudinal and transverse resonant modes. 10,19,23 The applications of gratings are not limited to the detection of RI, 5,[10][11][12][13]18 but extends to the estimation of analyte height (h) 10,24 where the latter is quite interesting, and the least explored as far as we can ascertain. In the context of detection of h, the spectral shift of surface wave resonance can be quantified, similar to that of RI.…”

Section: Introductionmentioning

confidence: 99%

“…The grating parameters were optimized 10,19 to maximize the absorption of propagating SPPs (surface wave). The spectral shift for each set of surface wave is pursued for various h values.…”

Section: Introductionmentioning

confidence: 99%

“…Fabry-Perot (FP)-like resonance modes are dependent on slit width and depth of the grating, which however can interfere with the Wood's anomaly (onset of the 1st order diffracted wave which propagates along the grating surface) producing other modes. 19 In the present case, the relevant parameters were optimized (results not shown here) in such a way that the FP-like resonances were suppressed in the region of spectral interest 10,19 while maximizing the absorption for surface waves. The resulting parameters were K ¼ 630 nm, a ¼ 160 nm, and t ¼ 220 nm, and the whole structure is referred to as K630-a160-t220-h(220-2200) for convenience.…”

Section: Introductionmentioning

confidence: 99%

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Non-universal behavior of leaky surface waves in a one dimensional asymmetric plasmonic grating

Vempati

Iqbal

Afsheen

2015

Journal of Applied Physics

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We report on a non-universal behavior of leaky surface plasmon waves on asymmetric (Si/Au/ analyte of different height) 1D grating through numerical modelling. The occurrence of the leaky surface wave was maximized (suppressing the Fabry-Perot cavity mode), which can be identified in a reflection spectrum through characteristic minimum. Beyond a specific analyte height (h), new sets of surface waves emerge, each bearing a unique reflection minimum. Furthermore, all of these minima depicted a red-shift before saturating at higher h values. This saturation is found to be non-universal despite the close association with their origin (being leaky surface waves). This behavior is attributed to the fundamental nature and the origin of the each set. Additionally, all of the surface wave modes co-exit at relatively higher h values. V C 2015 AIP Publishing LLC.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The grating parameters were optimized 10,19 to maximize the absorption of propagating SPPs (surface wave). The spectral shift for each set of surface wave is pursued for various h values.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Non-universal behavior of leaky surface waves in a one dimensional asymmetric plasmonic grating

Vempati

Iqbal

Afsheen

2015

Journal of Applied Physics

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Actively Tunable Structural Color Rendering with Tensile Substrate

Song

et al. 2017

Advanced Optical Materials

107

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CommuniCation(1 of 6) 1600829 and immune to bleach, thus hold great potentials in display, [6,7] anticounterfeiting technology, [19] etc.Structural colors are typically produced by diffractive gratings (with or without guided mode resonance (GMR)), [20][21][22] Fabry-Pérot cavity, [18] photonic crystals (PCs), [23,24] plasmonics, [1,[25][26][27] etc. Dynamic color tuning is a very important and fascinating direction in the field of structural colorations, because of its possible applications in stealthy, anticounterfeiting and displaying techniques. The resonant wavelengths of filters based on GMR effect are very sharp, resulting in high purity and brightness colors. Dynamic tuning of the GMR can be achieved by adopting the index-tunable materials as the waveguide layers. However, the possible color tuning gamut might be limited without the large index changes. Alternatively, the interferometric modulator display, a type of Fabry-Pérot cavity, can achieve the dynamic tunability of spectra via gap changing of the cavity controlled by the microelectromechanical system. This can produce a continuously varying color in the whole visible range, [18] but the strategy requires a complex controlling system, which is unfavorable for optoelectronic integration. The PCs can also provide dynamically tunable capability of the resonant wavelengths with the change of refractive indices of dielectrics in PC structures. [23,24] Plasmonics is known to offer a platform for transformative applications in optical frequency. [28][29][30][31] Nevertheless, plasmon in conventional nanoscale metallic systems cannot easily support the dynamical tunability because of the rigid structures or devices, except when it is composed of some certain materials or compound structures with tunable properties, such as optoelectronic or electrochemical materials, graphene, etc. [32][33][34][35][36] Herein, we propose and demonstrate a method to create actively tunable structural color based on tensile substrate, [37][38][39][40] i.e., polydimethylsiloxane (PDMS). PDMS, one of the most widely used silicon-based organic polymer, is particularly known for its unusual properties, [41] such as inert, nontoxic, and nonflammable. Taking advantage of the viscoelastic [42] and chemical stable [43] properties, elastic deformations (e.g., tension) of PDMS can be easily occurred under the external force. Therefore, the period of the structure on PDMS will change simultaneously, which causes the dynamic tuning of the surface plasmon resonance (SPR) wavelength, as the phase-matching condition changes. Moreover, compared to the previous dielectric-PDMS composed

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High‐Performance Transmission Structural Colors Generated by Hybrid Metal‐Dielectric Metasurfaces

Yang

Liu

Choi

et al. 2021

Advanced Optical Materials

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our previous work, the wide static colors exceeding 170% sRGB (standard RGB) space can be obtained by utilizing index matching among trilaminar dielectric nanoblocks to deeply modulate multipolar modes of reflection resonance. [19] Carrillo et al. proposed switchable phasechange metasurface resonant absorber to selectively absorb colors in the crystalline phase, providing potential development in front-end color displays, and color electronic signage. [23] For the structural colors in transmission mode, the majority of previous studies mainly focused CMYK color model since all-dielectric nanostructures can readily generate high-monochromaticity transmission valley. [10,[17][18][19][25][26][27][28][29] Realizing of highperformance transmission colors in RGB color model remains a challenge. Table 1 presents several representative designs to realize transmission colors in RGB model. [30][31][32][33][34][35][36][37][38] In the infancy, the strategy of arrayed nanoholes or nanoslits in optically-thick metallic films was extensively used to provide surface-plasmon enhanced transmission. [20][21][22][23][24][25][26][27][28][29][30][31][32] But only broad spectra with low efficiency and monochromaticity can be obtained because metallic materials hold high ohmic loss. In order to improve the quality of transmission spectra, the designs of metal-dielectric hybrid nanostructures were applied to realize structural colors with higher saturation. [33][34][35][36][37][38] For instance, Yun et al. proposed a bilayer hybrid metasurface consisting of Al nanogratings and asymmetrical amorphous Si nanorods. [35] Although the cavity effects between bi-matasurfaces can lead to unprecedented high-saturation colors taking up 90% sRGB space in the simulation, the low efficiency of about 16% and complicated Despite structural colors based on metasurfaces drawing enormous attentions due to the high resolutions and superior durability, few researches focus on transmission colors in RGB model with high saturation because high-monochromaticity transmission peak is hard to be realized. Herein, a strategy of high-performance transmission structural colors in RGB model with high saturation, full hue, high efficiency, easy manufacturability, and polarization independence by means of Al-Si 3 N 4 nanoblocks deposited on glass substrate is proposed. The coupling between Wood's anomaly and Mie lattice resonance is capable of introducing magnetic-dipole and electricquadrupole resonances, creating enhanced resonant peak with full width of half maximum (FWHM) of 50 nm and efficiency of over 70% in transmission mode. High-saturation transmission colors occupying 150% standard RGB (sRGB) space can be obtained for the first time by tailoring the geometric parameters. Besides, it is also demonstrated that the hybrid nanostructures can realize full-hue colors with constant resolutions, which is significant for imaging applications. The designed method has potential for further extending the applications of transmission colors.

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Plasmonic band edge effects on the transmission properties of metal gratings

Cited by 58 publications

References 47 publications

Non-universal behavior of leaky surface waves in a one dimensional asymmetric plasmonic grating

Non-universal behavior of leaky surface waves in a one dimensional asymmetric plasmonic grating

Actively Tunable Structural Color Rendering with Tensile Substrate

High‐Performance Transmission Structural Colors Generated by Hybrid Metal‐Dielectric Metasurfaces

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