Visual reality (VR) and augmented reality (AR) displays require ultra-high definition pixels with smaller sizes, narrower pitches and vertical beam angles. Unfortunately, micro-LED devices have an insurmountable challenge in reducing the pixel pitch due to the wide divergence angle of light source. Alternatively, a vertical-cavity surface-emitting laser is emerging as the most promising candidate for future high-definition display applications. Here, we have shown the world's first display implementation using an electrically injected DBR-free surface-emitting photonic crystal laser. We have also introduced, for the first time, a tunnel junction nanowire structure in the surface emitting photonic crystal laser system. With use of the tunnel junction, highly resistive p-GaN/metal contact was completely removed. The photonic crystal effect by photonic band edge mode eliminated the use of DBRs, which is essential for laser devices. We have further demonstrated that the spectral linewidth can be readily scalable by controlling the spacing of nanowires. Moreover, it was confirmed that such scalable spectral linewidths remain virtually invariant under the different temperature range of 12–375 K, which are critical to color accuracy in display. An ultra-compact micro-display with a pitch of 10 µm and a pixel size of 4 µm² was realized by electrically injected DBR-free surface-emitting photonic crystal laser devices.

视觉现实（VR）和增强现实（AR）显示器需要具有更小尺寸，更窄间距和垂直光束角的超高清像素。不幸的是，由于光源的发散角大，在减小像素间距方面，微型LED器件面临着巨大的挑战。或者，垂直腔表面发射激光器正在成为未来高清显示应用的最有希望的候选者。在这里，我们展示了世界上第一个使用电注入的无DBR表面发射光子晶体激光器的显示器实现方案。我们还首次在表面发射光子晶体激光系统中引入了隧道结纳米线结构。通过使用隧道结，高电阻p-GaN /金属接触被完全去除。光子带边缘模式的光子晶体效应消除了对激光设备必不可少的DBR的使用。我们进一步证明，通过控制纳米线的间距，可以容易地扩展光谱线宽。此外，已确认在12–375 K的不同温度范围内，这种可扩展的光谱线宽实际上保持不变，这对于显示中的色彩准确性至关重要。通过电注入无DBR的表面发射光子晶体激光器件，实现了间距为10 µm，像素尺寸为4 µm ²的超紧凑型微型显示器。