Design Principles and Performance Limitation of InGaN Nanowire Photonic Crystal Micro-LEDs

IF 2.1 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Journal Pub Date : 2024-12-04 DOI:10.1109/JPHOT.2024.3511344

Yakshita Malhotra;Xianhe Liu;Zetian Mi

引用次数: 0

Abstract

While micro-LEDs are crucial for ultrahigh resolution micro-displays, the efficiency of currently reported micro-LEDs degrades dramatically with decreasing size. Recently, the bottom-up nanowire approach has shown promise to break the efficiency bottleneck of this size effect. In this article, we investigated the design of nanowire photonic crystal structure for micro-LED applications and revealed its correlation with the Purcell effect. Key performance characteristics including efficiency, emission directionality, and spectral linewidth are thoroughly studied. For an LED structure with low internal quantum efficiency (IQE) of 10% due to high non-radiative recombination, an enhancement of ∼30% is found viable by using a properly designed photonic crystal. High emission directionality and a narrow spectral linewidth (∼ 5 nm) can be obtained with 60% of the light being emitted within a 20° acceptance angle.

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InGaN 纳米线光子晶体微型 LED 的设计原理和性能限制

虽然微型发光二极管对于超高分辨率微型显示器至关重要，但目前报道的微型发光二极管的效率会随着尺寸的减小而急剧下降。最近，自下而上的纳米线方法有望打破这种尺寸效应的效率瓶颈。本文研究了用于微型 LED 应用的纳米线光子晶体结构设计，并揭示了其与 Purcell 效应的相关性。我们对包括效率、发射方向性和光谱线宽在内的关键性能特征进行了深入研究。对于由于高度非辐射性重组而导致内部量子效率（IQE）低至 10%的 LED 结构，通过使用设计适当的光子晶体，可以将其效率提高 ∼ 30%。60% 的光可在 20° 接受角内发射，从而获得高发射方向性和窄光谱线宽（∼ 5 nm）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Journal ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

4.50

自引率

8.30%

发文量

489

审稿时长

1.4 months

期刊介绍： Breakthroughs in the generation of light and in its control and utilization have given rise to the field of Photonics, a rapidly expanding area of science and technology with major technological and economic impact. Photonics integrates quantum electronics and optics to accelerate progress in the generation of novel photon sources and in their utilization in emerging applications at the micro and nano scales spanning from the far-infrared/THz to the x-ray region of the electromagnetic spectrum. IEEE Photonics Journal is an online-only journal dedicated to the rapid disclosure of top-quality peer-reviewed research at the forefront of all areas of photonics. Contributions addressing issues ranging from fundamental understanding to emerging technologies and applications are within the scope of the Journal. The Journal includes topics in: Photon sources from far infrared to X-rays, Photonics materials and engineered photonic structures, Integrated optics and optoelectronic, Ultrafast, attosecond, high field and short wavelength photonics, Biophotonics, including DNA photonics, Nanophotonics, Magnetophotonics, Fundamentals of light propagation and interaction; nonlinear effects, Optical data storage, Fiber optics and optical communications devices, systems, and technologies, Micro Opto Electro Mechanical Systems (MOEMS), Microwave photonics, Optical Sensors.