Integrated p–n junction InGaN/GaN multiple-quantum-well devices with diverse functionalities

Cai, Wei; Gao, Xumin; Yuan, Wei; Yang, Yongchao; Yuan, Jialei; Zhu, Hongbo; Wang, Yongjin

doi:10.7567/apex.9.052204

Cited by 29 publications

(10 citation statements)

References 22 publications

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“…As shown in Fig. 2(d), three 100-µm-long and 6-µm-wide suspended waveguides impinge on the collector, which is optically coupled with the emitter [17]. For simplicity, in our case, the proposed device has similar waveguide and emitter architectures.…”

Section: Resultsmentioning

confidence: 99%

Spatiotemporal Summation of a Triple-Terminal Light-Induced Artificial Synapse

Shen

Shi

Zhang

et al. 2018

IEEE J. Electron Devices Soc.

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In the biological nervous system, repetitive-pulse signals from different presynaptic neurons may correlate to produce a specific association at the postsynaptic neuron for complex neural encoding. Here, the fabrication and characterization of a triple-emitter light-induced synaptic device artificial synapse is proposed to mimic excitatory postsynaptic voltage (EPSV) summation of the biological nervous system. When repetitive-pulse signals with different periods are synchronously applied to three presynaptic terminals, temporal, and spatial EPSV summations lead to synaptic strengthening. Resonant spatiotemporal correlations occur because the continuous activities make the presynaptic inputs correlate with respect to each other. Experimental results demonstrate three different resonant EPSV correlations generated by a combination of each of the two repetitive-pulse signals, which agree well with the simulations based on the convolution operation and the nonlinear distortion function. These results suggest that the multiple-emitter light-induced artificial synapse is promising for the emulation of biological neural networks.INDEX TERMS Multiple-emitter light-induced artificial synapse, excitatory postsynaptic voltage, resonant spatiotemporal correlation.

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Section: Resultsmentioning

confidence: 99%

Spatiotemporal Summation of a Triple-Terminal Light-Induced Artificial Synapse

Shen

Shi

Zhang

et al. 2018

IEEE J. Electron Devices Soc.

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“…Such devices can function as the transmitters to emit visible light signals, and as receivers to analyze incoming UV signals for bi-directional optical wireless communication applications. By joining a forward biased LED, a suspended waveguide, and a reverse biased PD together, an integrated p-i-n junction device sharing the same InGaN/GaN MQW active region has been demonstrated on GaN-on-silicon platform [70]. Apart from the planar structures, Tchernycheva et al reported a nanowire photonic platform consisting of InGaN core-shell nanowire LEDs and PDs optically coupled by SiN waveguides [71].…”

Section: Integrated Photonics At Visible Color Regimementioning

confidence: 99%

Laser-based visible light communications and underwater wireless optical communications: a device perspective

Shen

Alkhazragi

Sun

et al. 2019

Novel in-Plane Semiconductor Lasers XVIII

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High-speed visible light communications (VLC) has been identified at an essential part of communication technology for 5G network. VLC offers the unique advantages of unregulated and secure channels, free of EM interference. Compared with the LED-based VLC transmitter, laser-based photonic systems are promising for compact, droop-free, and high-speed white lighting and VLC applications, ideal for ultra-fast 5G network and beyond. Besides the potential for achieving high data rate free-space communication links, i.e. the Li-Fi network, laser-based VLC technology can also enable underwater wireless optical communications (UWOC) for many important applications. In this paper, the recent research progress and highlights in the fields of laser-based VLC and UWOC have been reviewed with a focused discussion on the performance of various light sources, including the modulation characteristics of GaNbased edge emitting laser diodes (EELDs), superluminescent diodes (SLDs) and vertical-cavity surface-emitting lasers (VCSELs). Apart from the utilization of discrete components for building transceiver in VLC systems, the development of III-nitride laser-based photonic integration has been featured. Such on-chip integration offers many advantages, including having a small-footprint, high-speed, and low power consumption. Finally, we discuss the considerations of wavelength selection for various VLC and UWOC applications. Comparison of infrared (IR) and visible lasers for channels with high turbulence and the study of ultraviolet (UV) and visible lasers for non-line-of-sight (NLOS) communications are presented.

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“…The responsivity of the InGaN-based WPD increases from 18 mA/W to 51 mA/W with increasing reverse bias voltage from 0 V to 10 V [91]. Since WPD and LD are sharing the same active layer design without the need of epitaxial regrowth, the semipolar InGaN-based WPD outperforms other QW PDs grown on polar c-plane substrates for simultaneous light emission and detection [93][94][95][96]. In summary, multi-section InGaN-based LDs on semipolar GaN substrates show promising performance for photonics integration at the visible wavelength regime.…”

Section: Devices In Laser-based Vlc Systemsmentioning

confidence: 99%

A tutorial on laser-based lighting and visible light communications: device and technology [Invited]

et al. 2019

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This tutorial focuses on devices and technologies that are part of laser-based visible light communication (VLC) systems. Laser-based VLC systems have advantages over their light-emitting-diode-based counterparts, including having high transmission speed and long transmission distance. We summarize terminologies related to laser-based solid-state lighting and VLC, and further review the advances in device design and performance. The high-speed modulation characteristics of laser diodes and superluminescent diodes, the on-chip integration of optoelectronic components in the visible color regime, such as the high-speed integrated photodetector, were introduced. The modulation technology for laser-based white light communication systems, and the challenges for future development were then discussed.

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Integrated p–n junction InGaN/GaN multiple-quantum-well devices with diverse functionalities

Cited by 29 publications

References 22 publications

Spatiotemporal Summation of a Triple-Terminal Light-Induced Artificial Synapse

Spatiotemporal Summation of a Triple-Terminal Light-Induced Artificial Synapse

Laser-based visible light communications and underwater wireless optical communications: a device perspective

A tutorial on laser-based lighting and visible light communications: device and technology [Invited]

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