LED emission enhancement (LEE) using smart metasurfaces

发光二极管(LED)灯泡代表着人工照明市场上一项潜在的颠覆性技术，因为与其白炽灯和紧凑型荧光灯(CFL)技术竞争对手相比，LED灯泡具有优越的性能。然而，除了相对较高的初始成本外，由于频谱不完全均匀以及在高功率时效率下降，它们仍然受到一些不适的影响。该项目将开发一种由超材料(一种超表面)组成的通用附加、经济高效的薄膜，该薄膜将被放置在LED光源的顶部以增强其亮度。将亮度增强的亚表面与LED灯集成形成人造光源，通过提高光功率提取的效率，以及增加LED光发射角光谱的辐射方向性，将解决上述主要问题。这项技术有望将亮度提高数倍，这将使LED成为大众市场无与伦比的照明解决方案，并为加拿大带来巨大好处。

Light-emitting diode (LED) bulbs represent a potentially disruptive technology on the market of artificial lighting, as they possess superior properties compared to their incandescent and compact fluorescent lamp (CFL) technology competitors. However, they still suffer from causing some discomfort due by their imperfectly uniform spectrum and from efficiency decline at high power, in addition to relatively higher initial costs. This project will develop enhancing a universal add-on, cost-effective thin film composed of metamaterials - a metasurface - that will be placed on the top of the LED source to enhance its luminosity. Integrating the luminosity-enhancing metasurfaces with LED lamps form artificial light sources that will solve the main aforementioned issues by enhancing the efficiency of light power extraction, and increasing the radiation directivity of the emitted angular spectrum of the LED light. A multi-fold luminosity enhancement is expected from this technique, which will make LEDs an unbeatable lighting solution for mass markets, with substantial benefits to Canada.