Explanipedia

High-performance green micro-LED array with isolated n-GaN layers for 6.58 Gbps high-speed visible light communication Open

Zhen Zhang, Zuxin Jin, Yuandong Ruan, Runze Runze Lin, Tianyang Ren , et al. · 2025

GaN-based micro-light-emitting diodes (micro-LEDs) have great advantages in visible light communication (VLC). However, the limited external quantum efficiency (EQE) and the modulation bandwidth of green micro-LEDs have been the obstacles …

Hyperspectral alignment capability for direct writing systems enabled by structured illumination with a micro-LED array Open

A. J. Blanchard, P. R. Edwards, Benoit Guilhabert, Erdan Gu, I. M. Watson , et al. · 2025

Direct writing systems equipped with a confocal micro-light-emitting diode array can employ active illumination for alignment purposes. Based on the principles of single-pixel imaging, structured illumination can be used to obtain position…

Simultaneous mapping of cathodoluminescence spectra and backscatter diffraction patterns in a scanning electron microscope Open

P. R. Edwards, G. Naresh‐Kumar, Jonathan J. D. McKendry, Enyuan Xie, Erdan Gu , et al. · 2024

Electron backscatter diffraction and cathodoluminescence are complementary scanning electron microscopy modes widely used in the characterisation of semiconductor films, respectively revealing the strain state of a crystalline material and…

A single micro-LED manipulation system based on micro-gripper Open

Jie Bai, Pingjuan Niu, Erdan Gu, Jianming Li, Clarence Augustine TH Tee · 2024

Micro-LEDs (μLEDs) have advantages in terms of brightness, power consumption, and response speed. In addition, they can also be used as micro-sensors implanted in the body via flexible electronic skin. One of the key techniques involved in…

Deep Ultraviolet CMOS-Controlled Micro Light-Emitting Diode Array Open

Jonathan J. D. McKendry, Enyuan Xie, Jordan Hill, Hichem Zimi, Johannes Herrnsdorf , et al. · 2023

We report a Deep Ultraviolet (DUV) AlGaN micro-light emitting diode (micro-LED) array driven by a matching array of electronic drivers implemented in Complementary Metal-Oxide-Semiconductor (CMOS) technology. This 40 × 10 pixel integrated …

Effects of LED Device Size on UV-C Short-Range LoS Optical Wireless Communication Open

Jordan Hill, Cheng Chen, Enyuan Xie, Jonathan J. D. McKendry, Johannes Herrnsdorf , et al. · 2023

We report systematic investigation of the device-size-dependent performance of ultraviolet C (UV-C) light emitting diodes (LEDs) for optical wireless communication (OWC). Utilizing 273 nm-wavelength devices with diameters in the range of 4…

MicroLED biosensor with colloidal quantum dots and smartphone detection Open

Natalie Bruce, F. Farrell, Enyuan Xie, Mark G. Scullion, Anne‐Marie Haughey , et al. · 2023

A fluorescence sensor with the capability for spatially multiplexed measurements utilizing smartphone detection is presented. Bioconjugated quantum dots are used as the fluorescent tag and are excited using a blue-emitting microLED (µLED).…

Hundred-meter Gb/s deep ultraviolet wireless communications using AlGaN micro-LEDs Open

Daniel M. Maclure, Cheng Chen, Jonathan J. D. McKendry, Enyuan Xie, Jordan Hill , et al. · 2022

We demonstrate the use of deep ultraviolet (DUV) micro-light-emitting diodes (LEDs) for long-distance line-of-sight optical wireless communications. With a single 285 nm-emitting micro-LED, we have respectively achieved data rates greater …

Automated alignment in mask‐free photolithography enabled by micro‐LED arrays Open

Mark Stonehouse, A. J. Blanchard, Benoit Guilhabert, Y. Zhang, Erdan Gu , et al. · 2021

We present an automated control system for micro scale positioning, based on single pixel imaging and fluorescence. By projecting a chequerboard array of CMOS controllable μ‐LEDs at a suitable wavelength, we are able to spatially locate, t…

Optimum Device and Modulation Scheme Selection for Optical Wireless Communications Open

Hyunchae Chun, Sujan Rajbhandari, Grahame Faulkner, Enyuan Xie, Jonathan J. D. McKendry , et al. · 2021

There has been extensive modelling of the optical wireless channel, and the optimum modulation scheme for a particular channel is well-understood. However, this modelling has not taken into account the trade-offs that transmitter and recei…

Fabrication and characteristics of flexible normally-off AlGaN/GaN HEMTs Open

Runze Lin, Desheng Zhao, Guohao Yu, Xiaoyan Liu, Dongdong Wu , et al. · 2020

In this paper, we present a method for removing a high electron mobility transistor (HEMT) silicon substrate using mechanical grinding and deep silicon etching technology and successfully transferred the epitaxial wafer to a PET substrate …

Gigabit per second visible light communication based on AlGaInP red micro-LED micro-transfer printed onto diamond and glass Open

J. F. C. Carreira, Enyuan Xie, Rui Bian, Johannes Herrnsdorf, Harald Haas , et al. · 2020

Full-color smart displays, which act both as a display and as a high-speed visible light communication (VLC) transmitter, can be realized by the integration of red-green-blue micron-sized light emitting diodes (micro-LEDs) onto a common pl…

Direct integration of micro-LEDs and a SPAD detector on a silicon CMOS chip for data communications and time-of-flight ranging Open

J. F. C. Carreira, Alexander D. Griffiths, Enyuan Xie, Benoit Guilhabert, Johannes Herrnsdorf , et al. · 2020

We present integration of singulated micron-sized light emitting diodes (micro-LEDs) directly onto a silicon CMOS drive chip using a transfer printing method. An 8x8 micro-LED device array with individual control over each pixel is demonst…

All-optical tuning of a diamond micro-disk resonator on silicon Open

P. Hill, Charalambos Klitis, Benoit Guilhabert, Marc Sorel, Erdan Gu , et al. · 2020

High-quality integrated diamond photonic devices have previously been demonstrated in applications from non-linear photonics to on-chip quantum optics. However, the small sample sizes of single crystal material available, and the difficult…

Gb/s Underwater Wireless Optical Communications Using Series-Connected GaN Micro-LED Arrays Open

Georgios N. Arvanitakis, Rui Bian, Jonathan J. D. McKendry, Cheng Chen, Enyuan Xie , et al. · 2019

High speed wireless communications are highly desirable for many industrial and scientific underwater applications. Acoustic communications suffer from high latency and limited data rates, while Radio Frequency communications are severely …

Deep three-dimensional solid-state qubit arrays with long-lived spin coherence Open

Colin Stephen, Ben L. Green, Yashna Lekhai, Laiyi Weng, P. Hill , et al. · 2019

Nitrogen-vacancy centers (NVCs) in diamond show promise for quantum computing, communication, and sensing. However, the best current method for entangling two NVCs requires that each one is in a separate cryostat, which is not scalable. We…

On-chip GaN-based dual-color micro-LED arrays and their application in visible light communication Open

J. F. C. Carreira, Enyuan Xie, Rui Bian, C. Chen, Jonathan J. D. McKendry , et al. · 2019

Integrated multi-color micron-sized light emitting diode (micro-LED) arrays have been demonstrated in recent years for display applications; however, their potential as visible light communication (VLC) transmitters is yet to be fully expl…

Multisite microLED optrode array for neural interfacing Open

Niall McAlinden, Yunzhou Cheng, Robert Scharf, Enyuan Xie, Erdan Gu , et al. · 2019

We present an electrically addressable optrode array capable of delivering light to 181 sites in the brain, each providing sufficient light to optogenetically excite thousands of neurons in vivo, developed with the aim to allow beha…

Pump-power-dependence of a CsPbBr3-in-Cs4PbBr6 quantum dot color converter Open

M. Leitao, Mohamed Sufyan Islim, Liang Yin, Shaun Viola, Scott Watson , et al. · 2019

A detailed study of the pump-intensity dependent characteristics of an all-inorganic CsPbBr3-in-Cs4PbBr6 quantum dot (QD) color converter are reported. This is an attractive material to color convert UV/blue GaN optical pump sources for di…

1 Gbps free-space deep-ultraviolet communications based on III-nitride micro-LEDs emitting at 262 nm Open

Xiangyu He, Enyuan Xie, Mohamed Sufyan Islim, Ardimas Andi Purwita, Jonathan J. D. McKendry , et al. · 2019

The low modulation bandwidth of deep ultraviolet (UV) light sources is considered as the main reason limiting the data transmission rate of deep UV communications.Here, we present high-bandwidth IIInitride micro-light emitting diodes (µLED…

Ultra-Low Cost High-Density Two-Dimensional Visible-Light Optical Interconnects Open

N. Bamiedakis, Jonathan J. D. McKendry, Enyuan Xie, Erdan Gu, Martin D. Dawson , et al. · 2019

Visible light communications have attracted considerable interest in recent years owing to the ability of low-cost light emitting diodes (LEDs) to act both as illumination sources and data transmitters with moderate data transmission rates…

Neural Network-Based Joint Spatial and Temporal Equalization for MIMO-VLC System Open

Sujan Rajbhandari, Hyunchae Chun, Grahame Faulkner, Harald Haas, Enyuan Xie , et al. · 2019

The limited bandwidth of white light-emitting diode (LED) limits the achievable data rate in a visible light communication (VLC) system. A number of techniques, including multiple-input-multiple-output (MIMO) system, are investigated to in…

High-Speed Visible Light Communication Based on a III-Nitride Series-Biased Micro-LED Array Open

Enyuan Xie, Xiangyu He, Mohamed Sufyan Islim, Ardimas Andi Purwita, Jonathan J. D. McKendry , et al. · 2018

Visible light communication (VLC) using III-nitride light-emitting diodes (LEDs) offers many advantages such as license-free operation, high spatial diversity and innate security. In particular, micro-LEDs (μLEDs) are strong candidates for…

A multi-site MicroLED Optrode Array for Neural Interfacing Open

Niall McAlinden, Yunzhou Cheng, Robert Scharf, Enyuan Xie, Erdan Gu , et al. · 2018

We present an electrically addressable optrode array capable of delivering light to 181 sites in the brain, each providing sufficient light to optogenetically excite hundreds of neurons in vivo , developed with the aim to allow behavioural…

Experimental demonstration of non-line-of-sight visible light communication with different reflecting materials using a GaN-based micro-LED and modified IEEE 802.11ac Open

Zhijian Lu, Pengfei Tian, Houqiang Fu, Jossue Montes, Xuanqi Huang , et al. · 2018

This paper gives an experimental demonstration of non-line-of-sight (NLOS) visible light communication (VLC) using a single 80 μm gallium nitride (GaN) based micro-light-emitting diode (micro-LED). This device shows a 3-dB electrical-to-op…

Thin film diamond membranes bonded on-demand with SOI ring resonators Open

P. Hill, Erdan Gu, Martin D. Dawson, Michael J. Strain · 2018

The hybrid integration of single-crystal (SC) diamond membranes with on-chip optical devices has the potential to service many applications, spanning non-linear optics to quantum photonics with embedded diamond colour centres. Limited dime…

The Impact of Solar Irradiance on Visible Light Communications Open

Mohamed Sufyan Islim, Stefan Videv, Majid Safari, Enyuan Xie, Jonathan J. D. McKendry , et al. · 2018

This paper aims to address the perception that visible light communication (VLC) systems cannot work under the presence of sunlight. A complete framework is presented to evaluate the performance of VLC systems in the presence of solar irra…

Manufacturing with light - micro-assembly of opto-electronic microstructures Open

Shuailong Zhang, Yongpeng Liu, Qian Yang, Weizhen Li, Joan Juvert , et al. · 2017

Optical micromanipulation allows the movement and patterning of discrete micro-particles within a liquid environment. However, for manufacturing applications it is desirable to remove the liquid, leaving the patterned particles in place. I…

Design, Fabrication, and Application of GaN-Based Micro-LED Arrays With Individual Addressing by N-Electrodes Open

Enyuan Xie, Mark Stonehouse, R. Ferreira, Jonathan J. D. McKendry, Johannes Herrnsdorf , et al. · 2017

We demonstrate the development, performance, and application of a GaN-based micro-light emitting diode ( LED) array sharing a common p-electrode (anode), and with individually addressable n-electrodes (cathodes). Compared to conventional G…

A Multigigabit per Second Integrated Multiple-Input Multiple-Output VLC Demonstrator Open

Sujan Rajbhandari, Jonathan J. D. McKendry, Johannes Herrnsdorf, R. Ferreira, Erdan Gu , et al. · 2017

In this paper, we report the performance of an imaging multiple input multiple output (MIMO) visible light communication (VLC) system. The VLC transmitter consists of a two-dimensional, individually addressable Gallium Nitride micro light …

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