15-Gb/s 50-cm Wireless Link Using a High-Power Compact III–V 84-GHz Transmitter

Wang, Jue; Al-Khalidi, Abdullah; Wang, Liquan; Morariu, Razvan; Ofiare, Afesomeh; Wasige, Edward

doi:10.1109/tmtt.2018.2859983

Cited by 25 publications

(10 citation statements)

References 29 publications

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“…In many cases, an SBD detector is used at the Rx while, in some other cases, an UTC-PD is employed at the Tx. The longest link distances of 50 cm [92], 80 cm [165], and 150 cm [166] feature Tx operating below 0.3 THz. For higher carrier frequencies f c , link distances are under 30 cm.…”

Section: A Wireless Systems Architecturementioning

confidence: 99%

Resonant Tunneling Diodes High-Speed Terahertz Wireless Communications - A Review

Cimbri

Wang

Al-Khalidi

et al. 2022

IEEE Trans. THz Sci. Technol.

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Resonant tunnelling diode (RTD) technology is emerging as one of the promising semiconductor-based solidstate technologies for terahertz (THz) wireless communications. This paper provides a review of the state-of-the-art, with a focus on the THz RTD oscillator, which is the key component of RTDbased THz transmitters and coherent receivers. A brief summary on the device principle of operation, technology, modelling, as well as an overview of oscillator design and implementation approaches for THz emitters, is provided. A new insight to device evaluation and to the reported oscillator performance levels is also given, together with brief remarks on RTD-based THz detectors. Thereafter, an overview of the reported wireless links which utilise an RTD in either transmission or reception, or in both roles, is given. Highlight results include the record single-channel wireless data rate of 56 Gb/s employing an all RTD-based transceiver, which demonstrates the potential of the technology for future short-range communications. The paper concludes with a discussion of the current technical challenges and possible strategies for future progress.

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Section: A Wireless Systems Architecturementioning

confidence: 99%

Resonant Tunneling Diodes High-Speed Terahertz Wireless Communications - A Review

Cimbri

Wang

Al-Khalidi

et al. 2022

IEEE Trans. THz Sci. Technol.

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“…Josephson junctions [10], micropillar lasers [24], excitable semiconductor lasers, including a graphene laser with saturable absorber [25], quantum-dot laser [26][27][28], microring resonators [29], vertical cavity surface emitting lasers (VCSELs) [30][31][32] and multi-section VCSELs with saturable absorber [33,34]. Table I (PDC) [36] as shown in Fig. 1d.…”

Section: Introductionmentioning

confidence: 99%

Resonant Tunneling Diode Nano-Optoelectronic Excitable Nodes for Neuromorphic Spike-Based Information Processing

et al. 2022

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tivity and component density, with dozens of transistors 43 required per neuron and additional external memories 44 needed for synaptic weights. This results in several µm 45 large neurons. Since dedicated wiring for every synap-46 tic link is not practical, neuromorphic electronic systems 47 usually employ a shared digital communication bus with 48 time-division multiplexing [5], gaining interconnectivity 49 at the expense of bandwidth, or use schemes such as 50 address-event representation (AER) [6]. As an alterna-51 tive, hardware technologies relying on physics for neuro-52 morphic computation are nowadays gaining increasing re-53 search interest. These include hybrid CMOS/memristive 54 systems (see [2] for an overview), spintronics [7] and pho-55 tonic systems [8, 9]. 56 57 Neuromorphic photonics is a nascent field, recently 58 gaining significant traction due to increasing importance 59 of AI algorithms and rapid advances in the field of pho-60 tonic integrated circuits (PICs). Optoelectronic systems 61 in particular are considered as highly suitable for future 62 cognitive computing hardware, as they benefit from op-63 eration with both electrons and photons, each excelling 64 at different key functionalities [14]. Thanks to their ca-65 pability to address bandwidth and interconnect energy 66 limits in a scalable fashion, optoelectronic systems might 67 prove as the optimal solution to overcome these limita-68 tions [15]. There are many different approaches to re-69 alization of artificial neural networks in optics (see for 70 example review [16]). Using delayed feedback, recurrent 71 neural networks can be realized in a photonic reservoir 72 computer, yielding networks with large number of virtual 130 and operation of RTDs with delayed feedback [42], ad-131 dressing only operation of a single (solitary) device. In 132 this work, we investigate interconnected systems con-133 sisting of multiple independent RTD-based monolithic 134 integrated optoelectronic nodes. We employ the nodes 135 as stateless excitable devices and take advantage of the 136 spike-based signalling to implement information process-137 ing tasks and multi-device networks with prospects for 138 very low footprint, low energy and high-speed operation 139 due to the use of sub-λ elements. We utilize two types 140 of nodes: an electronic-optical (E/O) RTD-LD system, 141 realized with a RTD element coupled to a nanoscale laser 142 diode (LD), and an optical-electronic (O/E) RTD-PD 143 system, realized with a photodiode (PD) coupled to a 144 RTD element. In both node types, spiking threshold can 145 be adjusted via bias voltage tuning. An illustration of 146 two nodes with an unidirectional optical weighted link, 147 representing two feedfoward linked neurons, is depicted 148 in Fig. 1a. 149 A. Optoelectronic RTD-system architecture 150 In both the RTD-LD and RTD-PD nodes, the two 151 functional blocks are integrated in a monolithic, metal 152 dielectric cavity micro-pillar with DBQW regions on 153 GaAs/AlGaAs materials [43] for operation at ...

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“…As a result, the probability for an incident electron to cross the barrier and thus the mean current across the RTD are locally maximized for certain voltages. Consequently, the I-V characteristic exhibits one or more finite regions of negative differential conductance [27,28]. In this study we assume the case of a DBQW with AlAs barriers and an InGaAs quantum well.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…This corresponds to the nanoRTD biased with a constant input voltage. It is well known from the literature that micro and nanoscale RTDs exhibit self-oscillations (i.e., limit cycle) in both current and voltage when biased in the NDC region and respond with a constant, DC output (i.e., fixed point of equilibrium) when biased in either PDC region [28,[34][35][36][37]. Numerical simulations show that, the specific range of input bias voltage for which the RTD presented here exhibits self-oscillations lies in between V 0 = 613 mV and V 0 = 722.9 mV (see Fig.…”

Section: Self-oscillations and Slow-fast Dynamicsmentioning

confidence: 99%

Spike propagation in a nanolaser-based optoelectronic neuron

Ortega

Piro

Figueiredo

et al. 2021

2021 Conference on Lasers and Electro-Optics Europe &Amp; European Quantum Electronics Conference (CLEO/Europe-EQEC)

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With the recent development of artificial intelligence and deep neural networks, alternatives to the Von Neumann architecture are in demand to run these algorithms efficiently in terms of speed, power and component size. In this theoretical study, a neuromorphic, optoelectronic nanopillar metal-cavity consisting of a resonant tunneling diode (RTD) and a nanolaser diode (LD) is demonstrated as an excitable pulse generator. With the proper configuration, the RTD behaves as an excitable system while the LD translates its electronic output into optical pulses, which can be interpreted as bits of information. The optical pulses are characterized in terms of their width, amplitude, response delay, distortion and jitter times. Finally, two RTD-LD units are integrated via a photodetector and their feasibility to generate and propagate optical pulses is demonstrated. Given its low energy consumption per pulse and high spiking rate, this device has potential applications as building blocks in neuromorphic processors and spiking neural networks.

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15-Gb/s 50-cm Wireless Link Using a High-Power Compact III–V 84-GHz Transmitter

Cited by 25 publications

References 29 publications

Resonant Tunneling Diodes High-Speed Terahertz Wireless Communications - A Review

Resonant Tunneling Diodes High-Speed Terahertz Wireless Communications - A Review

Resonant Tunneling Diode Nano-Optoelectronic Excitable Nodes for Neuromorphic Spike-Based Information Processing

Spike propagation in a nanolaser-based optoelectronic neuron

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