Directional high-efficiency nanowire LEDs with reduced angular color shift for AR and VR displays
정방향 고효율 나노선 LED, AR 및 VR 모니터의 역할 이동 감소
LED de nanoalambre de alta eficiencia direccional, reduciendo el cambio de papel de las pantallas ar y VR
LED Nanowire directionnelle et efficace pour réduire le déplacement de rôle des écrans ar et VR
Направленные высокоэффективные нано - проводные светодиоды, уменьшающие смещение ролей на дисплеях AR и VR
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, 29 December 2022

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.
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