Generation of high-power terahertz radiation by nonlinear photon-assisted tunneling transport in plasmonic metamaterials

Chen, Pai‐Yen; Salas, Rodolfo; Farhat, Mohamed

doi:10.1088/2040-8986/aa945a

Cited by 6 publications

(3 citation statements)

References 63 publications

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“…At optical frequencies, the nonlinearity of the tunneling current was demonstrated using time-dependent density functional theory (TDDFT) calculations for the case of a plasmonic dimer formed by spherical nanoparticles 67,69 . Recently reported hydrodynamic methods demonstrate the impact of the non-local screening on the nonlinear response of individual nanoparticles 60,[90][91][92] , and a model study based on the theory of PAT addressed the effect of tunneling in the nonlinear response of the gap nanoantenna [93][94][95][96] . However, a parameter-free quantum approach that allows to elucidate the rich variety of effects in the nanogap plasmonic system and the contribution of the different mechanisms driving the optical frequency conversion has not been attempted so far.…”

Section: Introductionmentioning

confidence: 99%

Role of electron tunneling in the nonlinear response of plasmonic nanogaps

et al. 2018

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We report on the theoretical study of the 2 nd and 3 rd harmonic generation in plasmonic dimer nanoantennas with narrow gaps. Our study is based on the time dependent density functional theory. This allows to address the nonlinear response of a tunneling junction in a subnanometric plasmonic gaps with a quantum calculation which goes beyond conventional classical local and nonlocal treatments. We demonstrate that the nonlinear electron transport in a plasmonic junction, associated to the corresponding strong field enhancement in the narrow gap, allows to reach orders of magnitude enhancement in the efficiency of the 2 nd and 3 rd harmonic generation. Depending on the size of the junction and the frequency of the fundamental incident wave, we show that the frequency conversion in plasmonic dimer gaps can be determined by: (i) the intrinsic nonlinearity of each individual nanoparticle, (ii) the nonlinear ac tunneling current across the gap, and (iii) the resonant excitations of the plasmon modes of the dimer. The study of the nonlinear response of plasmonic gaps within a full quantum treatment allows to understand the fundamental mechanisms of nonlinearity in nanoplasmonics.

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Section: Introductionmentioning

confidence: 99%

Role of electron tunneling in the nonlinear response of plasmonic nanogaps

et al. 2018

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“…As both photon absorption and conversion should be evaluated in terms of internal quantum efficiency (IQE) as well as external quantum efficiency (EQE), the aforementioned value on electrostatic potential can be utilized to detect photon diffusion after the substrate to the solar cell (EQE). Assuming that the absorbed photons have stimulated q charges, then according to Chen et al 47 , in quantum conductance, photon tunneling is possible. …”

Section: Resultsmentioning

confidence: 99%

Polarization and angular insensitive bendable metamaterial absorber for UV to NIR range

Shuvo

Hossain

Mahmud

et al. 2022

Sci Rep

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Broadband absorbers are required for solar energy harvesting because they efficiently absorb the incident photon in the wide-ranging solar spectrum. To ensure high absorption of photons, metamaterial absorbers (MMAs) have been a growing area of interest in recent years. In this article, an MMA is proposed using a metal–insulator–metal (MIM) structure (Ni–SiO2–Ni) that shows a near-unity broadband absorption of wavelengths from 300 to 1600 nm, with a 95.77% average absorption and a peak absorption of 99.999% at 772.82 nm. The MMA is polarization insensitive as well as wide incident angle stable. Analysis of the effects of mechanical bending on the absorption of the proposed structure shows that absorption holds satisfactory values at different degrees of mechanical loading. The suggested MMA unit cell structure was computationally simulated using the Finite Integration Technique (FIT) and verified using the Finite Element Method (FEM). To analyze the feasibility of the proposed MMA as a solar cell, it is investigated with the universal AM 1.5 solar spectrum characteristics. Besides solar energy harvesting, the proposed MMA unit cell may be employed in a variety of diverse optical applications, including sensors, detectors, and imaging.

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“…The MIM heterostructures have recently been studied as a current rectifying diode [25][26][27][28]. The research interest of MIM diodes was focused on application in rectifying high-frequency electromagnetic waves, THz electronics, infrared light, and even the conversion of visible light into electricity [16,29,30]. The MIM diodes based on bulk insulators, such as TiO 2 , ZnO, and NiO, could be applied in 28.3 THz rectenna switches [31].…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of Tunneling Diodes with 2D Insulators for Rectenna Switches

Li,

Raju,

Zhao

2024

Materials

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Rectenna is the key component in radio-frequency circuits for receiving and converting electromagnetic waves into direct current. However, it is very challenging for the conventional semiconductor diode switches to rectify high-frequency signals for 6G telecommunication (>100 GHz), medical detection (>THz), and rectenna solar cells (optical frequencies). Such a major challenge can be resolved by replacing the conventional semiconductor diodes with tunneling diodes as the rectenna switches. In this work, metal–insulator–metal (MIM) tunneling diodes based on 2D insulating materials were designed, and their performance was evaluated using a comprehensive simulation approach which includes a density-function theory simulation of 2D insulator materials, the modeling of the electrical characteristics of tunneling diodes, and circuit simulation for rectifiers. It is found that novel 2D insulators such as monolayer TiO2 can be obtained by oxidizing sulfur-metal layered materials. The MIM diodes based on such insulators exhibit fast tunneling and excellent current rectifying properties. Such tunneling diodes effectively convert the received high-frequency electromagnetic waves into direct current.

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Generation of high-power terahertz radiation by nonlinear photon-assisted tunneling transport in plasmonic metamaterials

Cited by 6 publications

References 63 publications

Role of electron tunneling in the nonlinear response of plasmonic nanogaps

Role of electron tunneling in the nonlinear response of plasmonic nanogaps

Polarization and angular insensitive bendable metamaterial absorber for UV to NIR range

Design and Simulation of Tunneling Diodes with 2D Insulators for Rectenna Switches

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