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Engineering 2023年第8期 11-13页

作者： Peter E.D.Love Jane Matthews Weili Fang Hanbin Luo School of Civil and Mechanical Engineering Curtin University School of Architecture and Built Environment Deakin University Geelong Waterfront Campus Department of Civil and Building Systems Technische Universit?t Berlin National Center of Technology Innovation for Digital Construction Huazhong University of Science and Technology School of Civil Engineering and Mechanics Huazhong University of Science and Technology

1. Introduction While the applications of computer visions are varied in construction, research has tended to focus on measuring the accuracy of object detectors such as faster region-based-convolution neural networks (Faster R-CNN) and single shot detector algorithms (SDD)[1]. Limited, if any, attention has focused on determining the benefits of such technology in construction beyond the claims that it can help detect problems quickly and accurately. Reinforcing this point are the numerous review papers that have frequented the literature [2,3].

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Single-step-fabricated disordered metasurfaces for enhanced light extraction from LEDs

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Light(Science & Applications) 2021年第10期10卷 1840-1848页

作者： Peng Mao Changxu Liu Xiyan Li Mengxia Liu Qiang Chen Min Han Stefan A.Maier Edward H.Sargent Shuang Zhang School of Physics and Astronomy University of BirminghamB152TT BirminghamUK National Laboratory of Solid State Microstructures College of Engineering and Applied Sciencesand Collaborative Innovation Centre of Advanced MicrostructuresNanjing UniversityNanjing 210093China Chair in Hybrid Nanosystems Nanoinstitute MunichFaculty of PhysicsLudwigMaximilians-Universitaet Muenchen80539 MuenchenGermany Department of Electrical and Computer Engineering University of Toronto35 St.George StreetTorontoON M5S 1A4Canada Key Laboratory of Intelligent Optical Sensing and Manipulation(Nanjing University) Ministry of EducationNanjingChina Department of Physics Imperial College LondonLondon SW72AZUK Department of Physics University of Hong KongHong Kong 999077China Department of Electrical and Electronic Engineering University of Hong KongHong Kong 999077China

While total internal reflection(TIR)lays the foundation for many important applications,foremost fibre optics that revolutionised information technologies,it is undesirable in some other applications such as light-emitting diodes(LEDs),which are a backbone for energy-efficient light *** the case of LEDs,TIR prevents photons from escaping the constituent high-index *** in material science have led to good efficiencies in generating photons from electron–hole pairs,making light extraction the bottleneck of the overall efficiency of *** recent years,the extraction efficiency has been improved,using nanostructures at the semiconductor/air interface that outcouple trapped photons to the outside ***,the design of geometrical features for light extraction with sizes comparable to or smaller than the optical wavelength always requires sophisticated and timeconsuming fabrication,which causes a gap between lab demonstration and industrial-level *** by lightning bugs,we propose and realise a disordered metasurface for light extraction throughout the visible spectrum,achieved with single-step *** applying such a cost-effective light extraction layer,we improve the external quantum efficiency by a factor of 1.65 for commercialised GaN LEDs,demonstrating a substantial potential for global energy-saving and sustainability.

关键词： light backbone consuming

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