Integration of bow-tie plasmonic nano-antennas on tapered fibers

Khaleque, Abdul; Mironov, Evgeny G.; Osório, Jonas H.; Li, Ziyuan; Cordeiro, Cristiano M. B.; Liu, Liming; Franco, Marcos A. R.; Liow, Jong‐Leng; Hattori, Haroldo T.

doi:10.1364/oe.25.008986

Cited by 34 publications

(14 citation statements)

References 31 publications

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“…We have indirectly measured the electric field enhancement of nano-antennas by using Raman spectroscopy (the Raman intensity is proportional to the fourth power of the electric field), but only at room temperature 44 . The Raman equipment used has an internal laser and optical parts that could be damaged at high temperatures and, moreover, the equipment does not have enough room to accommodate heaters to control the temperature of the antennas.…”

Section: Discussionmentioning

confidence: 99%

High Fluence Chromium and Tungsten Bowtie Nano-antennas

Morshed

Olbricht³

et al. 2019

Sci Rep

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Nano-antennas are replicas of antennas that operate at radio-frequencies, but with considerably smaller dimensions when compared with their radio frequency counterparts. Noble metals based nano-antennas have the ability to enhance photoinduced phenomena such as localized electric fields, therefore-they have been used in various applications ranging from optical sensing and imaging to performance improvement of solar cells. However, such nano-structures can be damaged in high power applications such as heat resisted magnetic recording, solar thermo-photovoltaics and nano-scale heat transfer systems. Having a small footprint, nano-antennas cannot handle high fluences (energy density per unit area) and are subject to being damaged at adequately high power (some antennas can handle just a few milliwatts). In addition, given that nano-antennas are passive devices driven by external light sources, the potential damage of the antennas limits their use with high power lasers: this liability can be overcome by employing materials with high melting points such as chromium (Cr) and tungsten (W). In this article, we fabricate chromium and tungsten nano-antennas and demonstrate that they can handle 110 and 300 times higher fluence than that of gold (Au) counterpart, while the electric field enhancement is not significantly reduced.

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Section: Discussionmentioning

confidence: 99%

High Fluence Chromium and Tungsten Bowtie Nano-antennas

Morshed

Olbricht³

et al. 2019

Sci Rep

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“…So, antennas have been making a resonant in (IR) and microwave region when it is designed as a nanoscale metallic with a sharpened will progress locally enhanced (E-field) [14]. So, when fabricated two a nanoscale triangles tip to tip metallic with a small distance gap between them this is a bowtie nanoantenna which gives a high electric field intensity in the air of the gab [14,15]. Because of a localized surface Plasmon excitation [15] So, by varying the gap distance between the two nanostructures we can be controlling the enhancement of electric field around the gap, and the resonance frequency, s-parameter, and wavelength.…”

Section: Gap Effectmentioning

confidence: 99%

“…So, when fabricated two a nanoscale triangles tip to tip metallic with a small distance gap between them this is a bowtie nanoantenna which gives a high electric field intensity in the air of the gab [14,15]. Because of a localized surface Plasmon excitation [15] So, by varying the gap distance between the two nanostructures we can be controlling the enhancement of electric field around the gap, and the resonance frequency, s-parameter, and wavelength. This can be shown in This result shows a correlation between the gap and resonance frequency when the light is parallel polarized to the axis along the pairs that combine to the nanoparticle center [14].…”

Section: Gap Effectmentioning

confidence: 99%

Design and study the performance of optical nanoantenna

Hassan

2019

QJES

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Recently, the light metallic interaction of nanostructures has grown to be an area of intensive care research due to advances in modern fabrication techniques. Unique effects have been observed in a nanostructure, and their applications have been found in various areas like in the manipulation of light on the nanometer scale. In this paper Nanoantenna has been introduced and invetigated by studing the effect of changing its parameters such as (shape, length, thickness, and the gap distance between two nanostructures) on the response of the nanoantenna (far field directivity, optical resonance frequency, and S-parameter). Here, a bow tie antenna has been chosen and additional parameters have been considered in the simulation, such as antenna thickness and material, and substrate material . The simulations have been generated using computer simulation technology (CST) studio. Optical antenna is performed from a pair of nanoparticles brought in close nearness, these pairs are separated by small gap to make a high electric field in its gap region. This feature can be employed for biosensing or SERS to improve the detection limit and measure the presence of single molecules.

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“…Bowtie nanoantennas (BAs) [14], [16], [30]- [35] and bowtie aperture antennas (BAAs) [36]- [41] are two common examples of widely used optical antennas. BAs consist of two triangular nanoparticles arranged tip-to-tip with a very small gap between them.…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Bowtie-Type Nanoantennas Integrated Onto a Silicon Waveguide Platform

Dong

Morozov

et al. 2019

IEEE Photonics J.

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In this paper, we provide a detailed three-dimensional numerical analysis of the optical properties of common and modified bowtie aperture antennas integrated onto a silicon waveguide platform, to discuss the influence of geometrical parameters on the electric field enhancement factor and waveguide transmission when such antennas are excited by the evanescent field of the Si waveguide mode. We demonstrate that waveguide transmission is severely affected by the interference between Si waveguide modes and surface plasmon polariton modes excited in the antenna, while the antenna's field enhancement factor is mainly determined by the localized surface plasmon resonance occurring in its nano-gap. These mechanisms lead to a mismatch between the wavelength at which the antenna's field enhancement factor is maximized, and the wavelength at which transmission through the Si waveguide is minimized, suggesting that in some multi-mode cases, the optical properties of integrated nanoantennas determined through direct measurement of Si waveguide transmission may be misleading. Methods for improving the electric field enhancement (such that it has a bigger modulation depth) that have minimal impact on the resonant wavelength, and for improving the shape and location of the corresponding hot spot of the bowtie aperture antennas, are also discussed and analyzed. We believe that this analysis will be helpful in design of on-chip bowtie-type optical antennas for surface enhanced Raman spectroscopy, near-field optical microscopy, high sensitivity detection, and plasmonic optical tweezers.

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Integration of bow-tie plasmonic nano-antennas on tapered fibers

Cited by 34 publications

References 31 publications

High Fluence Chromium and Tungsten Bowtie Nano-antennas

High Fluence Chromium and Tungsten Bowtie Nano-antennas

Design and study the performance of optical nanoantenna

Optical Properties of Bowtie-Type Nanoantennas Integrated Onto a Silicon Waveguide Platform

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