GaN micro-LED structured light sources for multi-modal optical wireless communications systems

Research output: Contribution to journalArticle

4 Downloads (Pure)

Abstract

Gallium nitride based light-emitting diodes (LEDs) have revolutionised the lighting industry with their efficient generation of blue and green light. While broad-area (square mm) devices have become the dominant LED lighting technology, fabricating LEDs into micro-scale pixels (micro-LEDs) yields further advantages for optical wireless communications (OWC), and for the development of smart-lighting applications such as tracking and imaging. The smaller active areas of micro-LEDs result in high current density operation, providing high modulation bandwidths and increased optical power density. Fabricating micro-LEDs in array formats allows device layouts to be tailored for target applications and provides additional degrees of freedom for OWC systems. Temporal and spatial control is crucial to utilise the full potential of these micro-scale sources, and is achieved by bonding arrays to pitch-matched complementary metal-oxide-semiconductor (CMOS) control electronics. These compact, integrated chips operate as digital-to-light converters, providing optical signals from digital inputs. Applying the devices as projection systems allows structured light patterns to be used for tracking and self-location, while simultaneously providing space-division multiple access communication links. The high speed nature of micro-LED array devices, combined with spatial and temporal control, allows many modes of operation for OWC providing complex functionality with chip-scale devices.
Original languageEnglish
Number of pages14
JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Publication statusAccepted/In press - 5 Jan 2020

Fingerprint

Optical Wireless
Structured Light
Optical Communication
wireless communication
Wireless Communication
Diode
Communication Systems
Light emitting diodes
Light sources
telecommunication
Communication systems
light sources
light emitting diodes
illuminating
Lighting
Chip
chips
Space division multiple access
Projection systems
multiple access

Keywords

  • gallium nitride
  • micro-LEDs
  • optical wireless communications

Cite this

@article{31f7242a214a413887e606db6adc3b33,
title = "GaN micro-LED structured light sources for multi-modal optical wireless communications systems",
abstract = "Gallium nitride based light-emitting diodes (LEDs) have revolutionised the lighting industry with their efficient generation of blue and green light. While broad-area (square mm) devices have become the dominant LED lighting technology, fabricating LEDs into micro-scale pixels (micro-LEDs) yields further advantages for optical wireless communications (OWC), and for the development of smart-lighting applications such as tracking and imaging. The smaller active areas of micro-LEDs result in high current density operation, providing high modulation bandwidths and increased optical power density. Fabricating micro-LEDs in array formats allows device layouts to be tailored for target applications and provides additional degrees of freedom for OWC systems. Temporal and spatial control is crucial to utilise the full potential of these micro-scale sources, and is achieved by bonding arrays to pitch-matched complementary metal-oxide-semiconductor (CMOS) control electronics. These compact, integrated chips operate as digital-to-light converters, providing optical signals from digital inputs. Applying the devices as projection systems allows structured light patterns to be used for tracking and self-location, while simultaneously providing space-division multiple access communication links. The high speed nature of micro-LED array devices, combined with spatial and temporal control, allows many modes of operation for OWC providing complex functionality with chip-scale devices.",
keywords = "gallium nitride, micro-LEDs, optical wireless communications",
author = "Griffiths, {A. D.} and J. Herrnsdorf and McKendry, {J. J. D.} and Strain, {M. J.} and Dawson, {M. D.}",
year = "2020",
month = "1",
day = "5",
language = "English",
journal = "Philosophical Transactions A: Mathematical, Physical and Engineering Sciences",
issn = "1364-503X",

}

TY - JOUR

T1 - GaN micro-LED structured light sources for multi-modal optical wireless communications systems

AU - Griffiths, A. D.

AU - Herrnsdorf, J.

AU - McKendry, J. J. D.

AU - Strain, M. J.

AU - Dawson, M. D.

PY - 2020/1/5

Y1 - 2020/1/5

N2 - Gallium nitride based light-emitting diodes (LEDs) have revolutionised the lighting industry with their efficient generation of blue and green light. While broad-area (square mm) devices have become the dominant LED lighting technology, fabricating LEDs into micro-scale pixels (micro-LEDs) yields further advantages for optical wireless communications (OWC), and for the development of smart-lighting applications such as tracking and imaging. The smaller active areas of micro-LEDs result in high current density operation, providing high modulation bandwidths and increased optical power density. Fabricating micro-LEDs in array formats allows device layouts to be tailored for target applications and provides additional degrees of freedom for OWC systems. Temporal and spatial control is crucial to utilise the full potential of these micro-scale sources, and is achieved by bonding arrays to pitch-matched complementary metal-oxide-semiconductor (CMOS) control electronics. These compact, integrated chips operate as digital-to-light converters, providing optical signals from digital inputs. Applying the devices as projection systems allows structured light patterns to be used for tracking and self-location, while simultaneously providing space-division multiple access communication links. The high speed nature of micro-LED array devices, combined with spatial and temporal control, allows many modes of operation for OWC providing complex functionality with chip-scale devices.

AB - Gallium nitride based light-emitting diodes (LEDs) have revolutionised the lighting industry with their efficient generation of blue and green light. While broad-area (square mm) devices have become the dominant LED lighting technology, fabricating LEDs into micro-scale pixels (micro-LEDs) yields further advantages for optical wireless communications (OWC), and for the development of smart-lighting applications such as tracking and imaging. The smaller active areas of micro-LEDs result in high current density operation, providing high modulation bandwidths and increased optical power density. Fabricating micro-LEDs in array formats allows device layouts to be tailored for target applications and provides additional degrees of freedom for OWC systems. Temporal and spatial control is crucial to utilise the full potential of these micro-scale sources, and is achieved by bonding arrays to pitch-matched complementary metal-oxide-semiconductor (CMOS) control electronics. These compact, integrated chips operate as digital-to-light converters, providing optical signals from digital inputs. Applying the devices as projection systems allows structured light patterns to be used for tracking and self-location, while simultaneously providing space-division multiple access communication links. The high speed nature of micro-LED array devices, combined with spatial and temporal control, allows many modes of operation for OWC providing complex functionality with chip-scale devices.

KW - gallium nitride

KW - micro-LEDs

KW - optical wireless communications

UR - https://royalsocietypublishing.org/journal/rsta

M3 - Article

JO - Philosophical Transactions A: Mathematical, Physical and Engineering Sciences

JF - Philosophical Transactions A: Mathematical, Physical and Engineering Sciences

SN - 1364-503X

ER -