High-Speed Graphene Photodetection: 300 GHz is not the Limit

Koepfli, Stefan M.; Baumann, Michael A.; Giger, Sascha; Keller, Killian; Horst, Yannik; Salamin, Yannick; Fedoryshyn, Yuriy; Leuthold, Juerg

doi:10.1109/cleo/europe-eqec52157.2021.9542100

Cited by 8 publications

(6 citation statements)

References 5 publications

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“…Although the double sideband nature of the signal transmission here limits achievable spectral efficiency, the results show that this can be somewhat offset by the successful transmission of OFDM signals with higher-order QAM, up to 512 levels. While the RF tunability demonstrated in this work is over a portion of the V-band, the use of higher speed photodiodes [32] and electrical components [33], in conjunction with the integrated dual laser source presented here, can facilitate A-RoF systems operating in the 100 GHz to 1 THz range.…”

Section: Discussionmentioning

confidence: 99%

Wavelength & mm-Wave Flexible Converged Optical Fronthaul With a Low Noise Si-Based Integrated Dual Laser Source

Dass

Delmade

Barry

et al. 2022

J. Lightwave Technol.

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A widely tunable hybrid InP-Si 3 N 4 dual laser module (DLM) with low linewidth and relative intensity noise (RIN) is used to develop a wavelength and frequency flexible optical fronthaul system for high-capacity wireless networks. The wavelength flexible (over C-band) delivery of 5G signals over an analog radio-overfiber (A-RoF) system, incorporating wireless transmission at 60 GHz is demonstrated. A phase noise (PN) and frequency offset (FO) cancelling receiver is used to overcome phase/frequency noise from the DLM due to thermal fluctuations, and this reduces the received (error vector magnitude) EVM to as low as 5%. Using the same DLM we demonstrate the mm-wave frequency flexible (over sub-V-band) delivery of 5G and WiGig signals over a simplified converged fronthaul link. The experimental results show excellent performance with bit error ratio (BER) values as low as 8.46×10 -6 and 1.11×10 -4 , and lowest EVMs of 2.4% and 6.1%, achieved for sub-V-band 5G and WiGig signals, respectively. In addition to highlighting the high flexibility of the DLM, this work also presents an approach to deploy this source in future optical-wireless access networks paving way for beyond 5G and 6G technologies.

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Section: Discussionmentioning

confidence: 99%

Wavelength & mm-Wave Flexible Converged Optical Fronthaul With a Low Noise Si-Based Integrated Dual Laser Source

Dass

Delmade

Barry

et al. 2022

J. Lightwave Technol.

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“…Recent demonstrations have shown that BTO plasmonics provides broadband modulation larger than 270 GHz [74] and therefore it is another promising nonlinear material for fast modulation. Exploiting BTO in data modulation experiments, symbol rates of 72 GBd [62,84,85] and 216 GBd [64] have already been shown using silicon or silicon nitride photonics, respectively.…”

Section: B11 Plasmonic Te Modulatorsmentioning

confidence: 99%

Plasmonic Transceivers for the Terabaud Age

Moor

Leuthold

Fedoryshyn

et al. 2024

IEEE J. Select. Topics Quantum Electron.

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This work summarizes the recent progress towards a Terabaud electronic-plasmonic circuit integration platform. The conventional (2D), flip-chip and monolithic electronic-photonic integrated circuit (EPIC) platform are compared side-by-side. The novel plasmonic-electronic approach is introduced and discussed with respect to advantages and challenges of the predominant photonic electronic integration technologies. A recent 222 GBd OOK plasmonic 2D integration and latest result on a 185 GBd OOK monolithic plasmonic EPIC are discussed in more detail. Recent advancements in the fields of plasmonic modulators and detectors are reviewed. In light of progress with components and integration, a path towards Terabaud-class transceivers is described.

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“…Therefore, hydrodynamic models (HDM) have been employed to solve mass, momentum, and energy conservation equations for the carriers in the semiconductors, to provide better accuracy. Especially for reaching THz operation speeds and developing sub-micron devices, modeling inertia effects and ballistic transport with HDM is vital [17,18,[25][26][27][28][29][30]. Applying a number of moment-expansion operations on the Boltzmann Transport Equation (BTE) would lead to transport models with increasing accuracy and complexity.…”

Section: Hydrodynamic Charge Transport In Graphene 221 Hydrodynamic T...mentioning

confidence: 99%

Modeling Hydrodynamic Charge Transport in Graphene

Güngör¹,

Koepfli²,

Baumann³

et al. 2022

Materials

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Graphene has exceptional electronic properties, such as zero band gap, massless carriers, and high mobility. These exotic carrier properties enable the design and development of unique graphene devices. However, traditional semiconductor solvers based on drift-diffusion equations are not capable of modeling and simulating the charge distribution and transport in graphene, accurately, to its full extent. The effects of charge inertia, viscosity, collective charge movement, contact doping, etc., cannot be accounted for by the conventional Poisson-drift-diffusion models, due to the underlying assumptions and simplifications. Therefore, this article proposes two mathematical models to analyze and simulate graphene-based devices. The first model is based on a modified nonlinear Poisson’s equation, which solves for the Fermi level and charge distribution electrostatically on graphene, by considering gating and contact doping. The second proposed solver focuses on the transport of the carriers by solving a hydrodynamic model. Furthermore, this model is applied to a Tesla-valve structure, where the viscosity and collective motion of the carriers play an important role, giving rise to rectification. These two models allow us to model unique electronic properties of graphene that could be paramount for the design of future graphene devices.

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High-Speed Graphene Photodetection: 300 GHz is not the Limit

Cited by 8 publications

References 5 publications

Wavelength & mm-Wave Flexible Converged Optical Fronthaul With a Low Noise Si-Based Integrated Dual Laser Source

Wavelength & mm-Wave Flexible Converged Optical Fronthaul With a Low Noise Si-Based Integrated Dual Laser Source

Plasmonic Transceivers for the Terabaud Age

Modeling Hydrodynamic Charge Transport in Graphene

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