IEEE Photonics Journal (Jan 2018)

Controllable Uniform Green Light Emitters Enabled by Circular HEMT-LED Devices

  • Yuefei Cai,
  • Yipin Gong,
  • Jie Bai,
  • Xiang Yu,
  • Chenqi Zhu,
  • Volkan Esendag,
  • Kean Boon Lee,
  • Tao Wang

DOI
https://doi.org/10.1109/JPHOT.2018.2867821
Journal volume & issue
Vol. 10, no. 5
pp. 1 – 7

Abstract

Read online

This paper reports a monolithic integration of GaN high-electron-mobility transistor (HEMT) and green light-emitting diode (LED), where the circular HEMT is surrounded by a ring-shaped LED and two devices are seamlessly interconnected by the LED's n-GaN layer and the HEMT's two-dimensional electron gas (2DEG) channel. By adopting such a novel circular layout design, the green HEMT-LED shows a controllable and uniform green light emission at 507 nm by simply tuning its gate voltage. This enables a uniform, controllable green LED light source, serving as an essential element in the red-green-blue (RGB) LED solution for a wide range of applications, such as tunable-spectrum white LED illumination, multichannel visible light communication with wavelength division multiplexing, RGB-based full-color LED displays, and optogenetics.

Keywords