Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale

Jakšić, Zoran; Smiljanić, M.; Vasiljević-Radović, Dana; Obradov, Marko; Radulović, K.; Tanaskovic, D.; Krstajić, P. M.

doi:10.1007/s11082-016-0500-7

Cited by 4 publications

(3 citation statements)

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“…Consequently, it results in a breakdown of the effective medium approximation which, in its usual form, does not account for the hotspots. More details can be found in, e.g., [ 46 , 47 , 48 ].…”

Section: Resultsmentioning

confidence: 99%

Brochosome-Inspired Metal-Containing Particles as Biomimetic Building Blocks for Nanoplasmonics: Conceptual Generalizations

2021

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Recently, biological nanostructures became an important source of inspiration for plasmonics, with many described implementations and proposed applications. Among them are brochosome-inspired plasmonic microstructures—roughly spherical core-shell particles with submicrometer diameters and with indented surfaces. Our intention was to start from the nanoplasmonic point of view and to systematically classify possible alternative forms of brochosome-inspired metal-containing particles producible by the state-of-the-art nanofabrication. A wealth of novel structures arises from this systematization of bioinspired metal-containing nanocomposites. Besides various surface nanoapertures, we consider structures closely related to them in electromagnetic sense like surface nano-protrusions, shell reliefs obtained by nano-sculpting, and various combinations of these. This approach helped us build a new design toolbox for brochosome-inspired structures. Additionally, we used the finite elements method to simulate the optical properties of simple brochosome-inspired structures. We encountered a plethora of advantageous optical traits, including enhanced absorption, antireflective properties, and metamaterial behavior (effective refractive index close to zero or negative). We conclude that the presented approach offers a wealth of traits useful for practical applications. The described research represents our attempt to outline a possible roadmap for further development of bioinspired nanoplasmonic particles and to offer a source of ideas and directions for future research.

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Section: Resultsmentioning

confidence: 99%

Brochosome-Inspired Metal-Containing Particles as Biomimetic Building Blocks for Nanoplasmonics: Conceptual Generalizations

2021

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“…The fact that meta-atoms can have different shapes and forms may actually introduce deeply subwavelength electromagnetic field “hotspots” within the meta-atom itself, causing the effective medium approximation to break down [ 145 ]. In this way they may cause novel phenomena, based on nonlocality effects.…”

Section: Membrane Metamaterialsmentioning

confidence: 99%

Bio-Inspired Nanomembranes as Building Blocks for Nanophotonics, Plasmonics and Metamaterials

2022

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Nanomembranes are the most widespread building block of life, as they encompass cell and organelle walls. Their synthetic counterparts can be described as freestanding or free-floating structures thinner than 100 nm, down to monatomic/monomolecular thickness and with giant lateral aspect ratios. The structural confinement to quasi-2D sheets causes a multitude of unexpected and often counterintuitive properties. This has resulted in synthetic nanomembranes transiting from a mere scientific curiosity to a position where novel applications are emerging at an ever-accelerating pace. Among wide fields where their use has proven itself most fruitful are nano-optics and nanophotonics. However, the authors are unaware of a review covering the nanomembrane use in these important fields. Here, we present an attempt to survey the state of the art of nanomembranes in nanophotonics, including photonic crystals, plasmonics, metasurfaces, and nanoantennas, with an accent on some advancements that appeared within the last few years. Unlimited by the Nature toolbox, we can utilize a practically infinite number of available materials and methods and reach numerous properties not met in biological membranes. Thus, nanomembranes in nano-optics can be described as real metastructures, exceeding the known materials and opening pathways to a wide variety of novel functionalities.

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“…Integrating plasmon metasurfaces on the packaging cap is an effective method to solve this problem [19]. Metasurfaces with extraordinary optical transmission (EOT) can be synthesized by applying plasmon resonances sustained by subwavelength aperture structures [20][21][22][23]. A silicon substrate with a subwavelength array of apertures can be effectively coupled with the incident light at resonance frequencies, which is beneficial to high optical transmission as well as narrowing the transmission bandwidth [24].…”

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confidence: 99%

A Novel 3D Encapsulation Structure Based on Subwavelength Structure and Inserted Pyrex Glass for RF MEMS Infrared Detectors

Zhao

Song

et al. 2019

Electronics

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A novel wafer-level three-dimensional (3D) encapsulation structure was designed for radio-frequency microelectromechanical system (RF MEMS) infrared detectors and investigated by using the finite element method (FEM) simulation. A subwavelength structure with a circular array of coaxial apertures was designed to obtain an extraordinary optical transmission (EOT) on top of a silicon substrate. For perpendicular incident light, a maximum transmission of 56% can be achieved in the long-wave infrared (LWIR) region and the transmission bandwidth covered almost the full LWIR region. Moreover, the maximum transmission could be further promoted with an increase in the incident angle. The vertical silicon vias, insulated by inserted Pyrex glass, were used to generate electrical contacts. With the optimized structure parameters, a feed-through level lower than −82 dB, and a transmission coefficient of one single via of more than −0.032 dB were obtained at a frequency from 0 to 2 GHz, which contributed to the low-loss transmission of the RF signals. Due to the matched thermal expansion coefficients (TECs) between silicon and Pyrex glass, the proposed via structure has excellent thermal reliability. Moreover, its thermal stress is much less than that of a conventional through-silicon via (TSV) structure. These calculated results demonstrate that the proposed 3D encapsulation structure shows enormous potential in RF MEMS infrared detector applications.Electronics 2019, 8, 974 2 of 12 planar interconnect packaging [6][7][8][9][10][11]. There are two primary types of wafer-level 3D packaging. One is film encapsulation, which utilizes an epitaxial highly doped silicon film to seal devices and vertical silicon feedthroughs to transmit electrical signals [6,7]. Although the film encapsulation can contribute to the miniaturization of devices, its micro-fabrication process is very complicated. Another type is typically based on through-silicon vias (TSVs) and wafer-level bonding [8][9][10][11]. This technique utilizes TSVs to make vertical interconnections, which embed the vertical metal feedthroughs and SiO 2 films in bulk silicon to transmit electrical signals and act as the insulation, respectively. However, this technique has some shortcomings including mismatched thermal expansion coefficients (TECs) between the metal and silicon, large dielectric loss, insulation failure, a complex process, and high cost [9]. In addition, the wafer-level bonding between the cap and device wafers is critical to achieve long-term operation as well as high thermal insulation for RF MEMS infrared detectors. The common bonding methods such as Cu-Sn bonding and Au-Sn bonding [11,12] are not cost-effective and easily cause large residue stress in the systems. The silicon wafer with inserted Pyrex glass is a promising 3D packaging structure, which utilizes vertical silicon feedthroughs to transmit electrical signals [13][14][15]. The inserted Pyrex glass acts as the electrical insulation and the anodic bonding material, which also has a matched TEC wi...

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Field localization control in aperture-based plasmonics by Boolean superposition of primitive forms at deep subwavelength scale

Cited by 4 publications

References 9 publications

Brochosome-Inspired Metal-Containing Particles as Biomimetic Building Blocks for Nanoplasmonics: Conceptual Generalizations

Brochosome-Inspired Metal-Containing Particles as Biomimetic Building Blocks for Nanoplasmonics: Conceptual Generalizations

Bio-Inspired Nanomembranes as Building Blocks for Nanophotonics, Plasmonics and Metamaterials

A Novel 3D Encapsulation Structure Based on Subwavelength Structure and Inserted Pyrex Glass for RF MEMS Infrared Detectors

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