Giant Electric Field Enhancement in Split Ring Resonators Featuring Nanometer-Sized Gaps

Bagiante, S.; Enderli, Florian; Fabiańska, Justyna; Sigg, H.; Feurer, Thomas

doi:10.1038/srep08051

Cited by 35 publications

(23 citation statements)

References 38 publications

(40 reference statements)

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“…At THz frequencies, extremely high field enhancement up to 10 4 has been reported for split-ring resonator structures. 17,18 Therefore, the combination of the metal nanopillars fabricated by the method as proposed in the present work with a gate electrode having such resonant structure would open up an interesting field of research. We also foresee a development of THz field emission switches by controlling the spatial position and the shape of the grown CNTs.…”

Section: B Discussionmentioning

confidence: 99%

Multiphoton photoemission of gold nanopillars fabricated by carbon nanotube templates

Monshipouri

Abdi

Darbari

et al. 2017

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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High-aspect ratio metallic nanopillars are promising as electron emitters in frequency ranges of terahertz and higher. However, producing nanopillars with aspect ratio of more than a factor of 10 by lithographic methods is still a challenge. Here, the authors report the fabrication of Au nanopillars using carbon nanotube forests as templates and a study on their near infrared photocurrent characterization. The pillars had the diameter of 100 nm and the aspect ratio up to 28. The authors observed an increase in the photocurrent from Au nanopillars with the increase in the nanopillar height. The observed photocurrent is compatible with the multiphoton photoemission and is uncorrelated to the pillar density. The results indicate that our proposed method is promising to produce electron sources for high frequency vacuum nanoelectronic devices. V

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Section: B Discussionmentioning

confidence: 99%

Multiphoton photoemission of gold nanopillars fabricated by carbon nanotube templates

Monshipouri

Abdi

Darbari

et al. 2017

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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“…The vertically aligned metallic nanogaps can initiate the terahertz nonlinear response arising from the quantum tunneling effect. Noble metals such as gold or copper are good conductors in terahertz frequencies; therefore, they can induce extremely large field enhancement enough to reach the quantum regime with the few nanometer-sized gap structures [85]. Figure 9A shows the experimental scheme for the terahertz quantum plasmonics using intense terahertz pulse [86,87] and metallic nanogap structures [14].…”

Section: Terahertz Nonlinear Transmission Responsementioning

confidence: 99%

Terahertz quantum plasmonics at nanoscales and angstrom scales

2020

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Through the manipulation of metallic structures, light–matter interaction can enter into the realm of quantum mechanics. For example, intense terahertz pulses illuminating a metallic nanotip can promote terahertz field–driven electron tunneling to generate enormous electron emission currents in a subpicosecond time scale. By decreasing the dimension of the metallic structures down to the nanoscale and angstrom scale, one can obtain a strong field enhancement of the incoming terahertz field to achieve atomic field strength of the order of V/nm, driving electrons in the metal into tunneling regime by overcoming the potential barrier. Therefore, designing and optimizing the metal structure for high field enhancement are an essential step for studying the quantum phenomena with terahertz light. In this review, we present several types of metallic structures that can enhance the coupling of incoming terahertz pulses with the metals, leading to a strong modification of the potential barriers by the terahertz electric fields. Extreme nonlinear responses are expected, providing opportunities for the terahertz light for the strong light–matter interaction. Starting from a brief review about the terahertz field enhancement on the metallic structures, a few examples including metallic tips, dipole antenna, and metal nanogaps are introduced for boosting the quantum phenomena. The emerging techniques to control the electron tunneling driven by the terahertz pulse have a direct impact on the ultrafast science and on the realization of next-generation quantum devices.

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“…Most interestingly, a giant field enhancement of 10 ! in the time domain has been shown by using a single split-ring resonator with a nanometersized gap [4]. Photoconductive, fractal antennas have been shown to work well at multiple THz frequencies, thus having a broadband emission spectrum.…”

Section: Introductionmentioning

confidence: 99%

Time-domain electric field enhancement on micrometer scale in coupled split ring resonator upon terahertz radiation

Lange

Iwaszczuk

Hoffmann

et al. 2016

2016 41st International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

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Giant Electric Field Enhancement in Split Ring Resonators Featuring Nanometer-Sized Gaps

Cited by 35 publications

References 38 publications

Multiphoton photoemission of gold nanopillars fabricated by carbon nanotube templates

Multiphoton photoemission of gold nanopillars fabricated by carbon nanotube templates

Terahertz quantum plasmonics at nanoscales and angstrom scales

Time-domain electric field enhancement on micrometer scale in coupled split ring resonator upon terahertz radiation

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