High-speed visible light communication based on micro-LED: A technology with wide applications in next generation communication

Lu, Tingwei; Lin, Xiangshu; Guo, Wenan; Tu, Chang-Ching; Liu, Shibiao; Lin, Chun‐Jung; Chen, Zhong; Kuo, Hao‐Chung; Wu, Tingzhu

doi:10.29026/oes.2022.220020

Cited by 18 publications

(6 citation statements)

References 183 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polarized light is crucial in numerous applications, including liquid crystal display (LCD) backlights 1 , polarization multiplexing in optical communications 2,3 , ultrasensitive photodetectors 4,5 , and optical quantum comput-ing 6,7 . However, the conventional method of generating polarized light through an optical polarizer reduces the intensity by at least 50% because half of the light in the vertical polarization direction is completely filtered 8,9 .…”

Section: Introductionmentioning

confidence: 99%

Self-polarized RGB device realized by semipolar micro-LEDs and perovskite-in-polymer films for backlight applications

Lu,

Lin,

Zhang

et al. 2024

OEA

Self Cite

View full text Add to dashboard Cite

In backlighting systems for liquid crystal displays, conventional red, green, and blue (RGB) light sources that lack polarization properties can result in a significant optical loss of up to 50% when passing through a polarizer. To address this inefficiency and optimize energy utilization, this study presents a high-performance device designed for RGB polarized emissions. The device employs an array of semipolar blue μLEDs with inherent polarization capabilities, coupled with mechanically stretched films of green-emitting CsPbBr 3 nanorods and red-emitting CsPbI 3 -Cs 4 PbI 6 hybrid nanocrystals. The CsPbBr 3 nanorods in the polymer film offer intrinsic polarization emission, while the aligned-wire structures formed by the stable CsPbI 3 -Cs 4 PbI 6 hybrid nanocrystals contribute to substantial anisotropic emissions, due to their high dielectric constant. The resulting device achieved RGB polarization degrees of 0.26, 0.48, and 0.38, respectively, and exhibited a broad color gamut, reaching 137.2% of the NTSC standard and 102.5% of the Rec. 2020 standard. When compared to a device utilizing c-plane LEDs for excitation, the current approach increased the intensity of light transmitted through the polarizer by 73.6%. This novel fabrication approach for polarized devices containing RGB components holds considerable promise for advancing next-generation display technologies.

show abstract

Section: Introductionmentioning

confidence: 99%

Self-polarized RGB device realized by semipolar micro-LEDs and perovskite-in-polymer films for backlight applications

Lu,

Lin,

Zhang

et al. 2024

OEA

Self Cite

View full text Add to dashboard Cite

show abstract

“…1,2 In addition to display applications, visible light communication (VLC) technology based on μLEDs has attracted the attention of researchers. 3,4 Currently, VLC systems based on μLEDs operating as emitters have been widely reported with transmission rates up to more than 10 GHz. 5−7 However, relatively few studies have been conducted on the use of μLEDs as VLC photodetectors (PDs).…”

Section: Introductionmentioning

confidence: 99%

Advancing Long-Wavelength InGaN Micro-LEDs as Wavelength-Selective Detectors for White-Light Communication

Lu,

Dai,

Lee

et al. 2024

ACS Photonics

Self Cite

View full text Add to dashboard Cite

Long-wavelength InGaN-based microlight emitting diodes (μLEDs) have the potential for novel display and visible light communication (VLC). In this study, red and yellow μLEDs were fabricated for VLC applications as VLC transmitters and photodiodes (PDs). Stress modulation engineering and atomic layer deposition (ALD) techniques were employed to improve the transmission and detection performance. When operating as VLC transmitters, the red and yellow μLEDs exhibits high modulation bandwidth of 439.7 and 532.5 MHz at 2000 A/cm2, achieving a data rate of 1.9 and 2.4 Gbps, respectively. When operating as VLC PDs, long-wavelength emitting μLEDs with high indium component QW exhibit longer wavelength absorption edge, which is expected to achieve higher responsivity to blue light while filtering out the fluorescence component. The response spectra of the red and yellow μLED PDs overlap a large portion of the blue signal. The red and yellow μLEDs achieved responsivities of up to 0.208 and 0.135 A/W, respectively, for 450 nm light, higher than those of the reported InGaN LED-based photodetectors. In addition, owing to the wavelength selectivity, the long-wavelength μLED PDs could filter the slow fluorescence emission, thus achieving white light modulation bandwidth several times that achieved by adopting a silicon-based detector. A white-light VLC system was experimentally demonstrated. Maximum transmission rates of 1.2 and 1.05 Gbps were achieved based on red and yellow μLEDs operating as PDs, respectively. The findings of this study indicate that employing red μLED pixels as wavelength-selective PDs in future μLED information displays is an effective strategy for phosphor-based white-light communication.

show abstract

“…It is of the utmost importance that the droop effect be optimized. In addition, there have been quite a few review articles on high-speed visible light communication based on microLEDs [ 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances on GaN-Based Micro-LEDs

Zhang

Kang

et al. 2023

Micromachines

View full text Add to dashboard Cite

GaN-based micro-size light-emitting diodes (µLEDs) have a variety of attractive and distinctive advantages for display, visible-light communication (VLC), and other novel applications. The smaller size of LEDs affords them the benefits of enhanced current expansion, fewer self-heating effects, and higher current density bearing capacity. Low external quantum efficiency (EQE) resulting from non-radiative recombination and quantum confined stark effect (QCSE) is a serious barrier for application of µLEDs. In this work, the reasons for the poor EQE of µLEDs are reviewed, as are the optimization techniques for improving the EQE of µLEDs.

show abstract

High-speed visible light communication based on micro-LED: A technology with wide applications in next generation communication

Cited by 18 publications

References 183 publications

Self-polarized RGB device realized by semipolar micro-LEDs and perovskite-in-polymer films for backlight applications

Self-polarized RGB device realized by semipolar micro-LEDs and perovskite-in-polymer films for backlight applications

Advancing Long-Wavelength InGaN Micro-LEDs as Wavelength-Selective Detectors for White-Light Communication

Recent Advances on GaN-Based Micro-LEDs

Contact Info

Product

Resources

About