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(Peer-Reviewed) Directional high-efficiency nanowire LEDs with reduced angular color shift for AR and VR displays
Yizhou Qian, Zhiyong Yang, Yu-Hsin Huang, Kuan-Heng Lin, Shin-Tson Wu 吴诗聪
College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
Opto-Electronic Science, 2022-12-29
https://doi.org/10.29026/oes.2022.220021
https://www.oejournal.org/article/doi/10.29026/oes.2022.220021
Abstract

The emission wavelength of InGaN/GaN dot-in-wire LED can be tuned by modifying the nanowire diameter, but it causes mismatched angular distributions between blue, green, and red nanowires because of the excitation of different waveguide modes. Besides, the far-field radiation patterns and light extraction efficiency are typically calculated by center dipoles, which fails to provide accurate results.

To address these issues, we first compare the simulation results between central dipole and dipole cloud with experimental data. Next, we calculate and analyze the display metrics for full-color nanowire LEDs by 3D dipole cloud. Finally, we achieve unnoticeable angular color shift within ±20° viewing cone for augmented reality (AR) and virtual reality (VR) displays with an improved light extraction efficiency.
Directional high-efficiency nanowire LEDs with reduced angular color shift for AR and VR displays_1
Directional high-efficiency nanowire LEDs with reduced angular color shift for AR and VR displays_2
Directional high-efficiency nanowire LEDs with reduced angular color shift for AR and VR displays_3
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