Global Modeling of Active Terahertz Plasmonic Devices

Khorrami, Mohammad Ali; El-Ghazaly, S.M.; Naseem, Hameed A.; Yu, Shui-Qing

doi:10.1109/tthz.2013.2281146

Cited by 27 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, not only plane waves are excited in confined structures, but also the evancesscent waves near the contacts 15,16 . From the first glance, the complexity of plasmonic response in confined 2DES makes full electromagnetic simulations 17,18 an only tool to predict their resonant properties.…”

Section: Introductionmentioning

confidence: 99%

Exact Solution for Driven Oscillations in Plasmonic Field-Effect Transistors

Svintsov

2018

Phys. Rev. Applied

View full text Add to dashboard Cite

High-mobility field effect transistors can serve as resonant detectors of terahertz radiation due to excitation of plasmons in the channel. The modeling of these devices previously relied either on approximate techniques, or complex full-wave simulations. In this paper, we obtain an exact solution for driven electrical oscillations in plasmonic field-effect transistor with realistic contact geometry. The obtained solution highlights the importance of evanescent plasma waves excited near the contacts, which qualitatively modify the detector responsivity spectra. We derive the boundary condition on the ac floating electrodes of plasmonic FET which interpolates between open-circuit (Dyakonov-Shur) and short-circuit (clamped voltage) boundary conditions. In both limits, the FET photovoltage possesses resonant fringes, however, the absolute value of voltage is greater in the open-circuit regime.

show abstract

Section: Introductionmentioning

confidence: 99%

Exact Solution for Driven Oscillations in Plasmonic Field-Effect Transistors

Svintsov

2018

Phys. Rev. Applied

View full text Add to dashboard Cite

show abstract

“…In addition, commercial numerical solvers have currently a limited ability to self-consistently solve problems involving complex electron dynamics (for example, effects of diffusion and dc currents). Analysis of such problems by purpose-built solvers has so far been limited to rather simple geometries [40].…”

Section: Theoretical Modelmentioning

confidence: 99%

Terahertz plasmons in coupled two-dimensional semiconductor resonators

Sydoruk

Mayorov

et al. 2015

Phys. Rev. B

View full text Add to dashboard Cite

Advances in theory are needed to match recent progress in measurements of coupled semiconductor resonators supporting terahertz plasmons. Here, we present a field-based model of plasmonic resonators that comprise gated and ungated two-dimensional electron systems. The model is compared to experimental measurements of a representative system, in which the interaction between the gated and ungated modes leads to a rich spectrum of hybridized resonances. A theoretical framework is thus established for the analysis and design of gated low-dimensional systems used as plasmonic resonators, underlining their potential application in the manipulation of terahertz frequency range signals.

show abstract

“…Numerous structures of photoconductive antennas have been proposed, which were based on the incorporation of optical nano antennas [17], fractal geometries [18], gammadion-type structure [19], tapered helix monopole [20], hexagonal nano-antenna [21], interdigitated metallic dipole nanoantenna [22]- [24], 3D plasmon contact electrodes [25], nano-structured electrodes [26], thin-film plasma electrode [27], rectangular metal dipole nanoantenna [28], bow-tie metallic dipole nanoantenna [28], plasmon contact electrodes [29], [30], SRR-loaded antennas [31], and arrays of bowtie and four-leaf-clover-shaped antennas [32]. Further, several numerical models have been proposed for understanding the dynamics of these photoconductive antennas, such as full-wave numerical technique based on Maxwell and hydrodynamic transport equations [33], semiconductor carrier transport and migration models [22], [34], time-domain numerical modeling [35], numerical solution of induced current based on Monte Carlo simulation [36], finite element method [27], [37], and three-dimensional full-wave model [38].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Structural Parameters of Split-Ring Resonators on the Terahertz Radiation Characteristics of Micro-Structured Photoconductive Antennas: A Simulation Study

Xiong

et al. 2020

IEEE Photonics J.

View full text Add to dashboard Cite

In this study, we have theoretically designed a micro-structured photoconductive antenna based on the combination of split-ring resonator (SRR) and dipole photoconductive antenna. Further, we have used numerical simulations to prove that the proposed antenna can enhance the terahertz radiation characteristics. According to the equivalent circuit model analysis, the terahertz radiation power and the resonance frequency of this antenna were found to be closely related with the structural parameters of the SRR. A numerical model was established to simulate the effect of the structural parameters of SRR on the terahertz radiation characteristics of the proposed antenna. The results indicated that an increase in the width and length of SRR caused an increase in the peak power intensity and a decrease in the resonance frequency. Moreover, as the gap width of SRR was increased, the peak power intensity was decreased and the resonance frequency was increased. Furthermore, the terahertz radiation power increased with increase in the gap width of antennas. Overall, we show that high-power terahertz radiation sources with specific frequency can be obtained by optimizing the structural parameters of SRR, and such sources are potentially useful in a variety of fields such as biomedicine, material analysis, and detection systems.

show abstract

Global Modeling of Active Terahertz Plasmonic Devices

Cited by 27 publications

References 33 publications

Exact Solution for Driven Oscillations in Plasmonic Field-Effect Transistors

Exact Solution for Driven Oscillations in Plasmonic Field-Effect Transistors

Terahertz plasmons in coupled two-dimensional semiconductor resonators

The Impact of Structural Parameters of Split-Ring Resonators on the Terahertz Radiation Characteristics of Micro-Structured Photoconductive Antennas: A Simulation Study

Contact Info

Product

Resources

About