导读：【论文速递】栏目精选客户利用双利合谱高光谱设备发表的研究成果，从农林生态遥感、食品质检、到生物医学等领域，展现高光谱成像技术如何以“图谱合一”的硬核能力，突破传统检测方法的痛点，推动学科交叉创新。将定期分享客户使用双利合谱产品发表的SCI论文，涵盖技术前沿、应用创新以及行业突破，为您在高光谱成像技术向更宽领域的拓展提供参考。

Origins of Inhomogeneous Light Emission From GaN-Based Flip-Chip Green Micro-LEDs

GaN 基倒装芯片绿光 Micro-LED 发光不均匀的根源

论文中所使用双利合谱产品：

便携式成像光谱系统

摘要：

Spatially resolved electroluminescence emit ted through the sapphire substrate of GaN-based flip-chip green microscale light-emitting diodes with 20 × 20 µm2 mesas has been collected via microscopic hyperspectral imaging. The current crowding is identified in the central region of the mesa, corresponding to the position of the p-pad. The bright-spot emissions at the edges of the mesa originate from localized potential energy valleys . This letter suggests that the comprehensive information about current crowding and the distribution of the light emission across the mesa of microscale light-emitting diode can be obtained by capturing spatially resolved light emission from the side of the transparent substrate.

通过微观高光谱成像收集了通过 20 × 20 µm2 台面的 GaN 基倒装芯片绿色微尺度发光二极管的蓝宝石衬底发射的空间分辨电致发光。在台面的中心区域识别出电流拥挤，对应于 p 焊盘的位置。台面边缘的亮点发射源自局部势能谷。本文表明，通过从透明基板侧面捕获空间分辨的光发射，可以获得有关电流拥挤和微尺度发光二极管台面上光发射分布的全面信息。

DOI：10.1109/LED.2019.2915023

期刊：ELECTRON DEVICE LETTERS

关键词：微型 LED、电流拥挤、空间分辨电致发光

图注：GaN 基倒装芯片绿色微型 LED 的归一化 EL 强度、质心波长和FWHM 的伪彩色图

The Impact of Luminous Properties of Red, Green, and Blue Mini-LEDs on the Color Gamut

红、绿、蓝 Mini-LED 发光特性对色域的影响

论文中所使用双利合谱产品：

便携式成像光谱系统

摘要：

The color gamut is crucial in a display。 The light-current-voltage (L–I–V) characteristics of red, green, and blue flip chip miniature light-emitting diodes (LEDs) (100 μm × 200 μm) were investigated at temperatures similar to those used in operation。 Both the ideal factor and the temperature dependence of the external quantum efficiency (EQE) indicate higher non-radiative losses in the red mini-LEDs。 We also illustrate the intense lateral luminous intensity fluctuations of the red mini-LEDs under overdrive currents by capturing spatial emission mapping。

The effect of temperature and driving current on the chromaticity coordinates of the mini-LED was determined。 In addition, we propose a driving current algorithm to maximize the color gamut of trichromatic mixed light at different temperatures。 The results show that for the application of self-illuminating mini-LED displays, the maximum color gamut is more sensitive to green emission, while enhancing the radiative recombination in the red mini-LED can greatly improve the net performance。

色域在显示器中至关重要。在与工作温度相似的温度下研究了红色、绿色和蓝色倒装芯片微型发光二极管 (LED) (100 µm × 200 µm) 的光-电流-电压 (L–I–V) 特性。理想因子和外部量子效率 (EQE) 的温度依赖性都表明红色 mini-LED 中的非辐射损耗较高。我们还通过捕获空间发射映射来说明过驱动电流下红色 mini-LED 的强烈横向发光强度波动。确定了温度和驱动电流对 mini-LED 色度坐标的影响。此外，我们提出了一种驱动电流算法，以最大化不同温度下三色混合光的色域。结果表明，对于自发光 mini-LED 显示器的应用，最大色域对绿色发射更敏感，而增强红色 mini-LED 中的辐射复合可以大大提高净性能。

DOI：10.1109/TED.2019.2906321

期刊：TRANSACTIONSON ELECTRONDEVICES

关键词：显示器、微型发光二极管 (LED)、色域

图注：图300 K 下 mini-LED 发光强度的伪彩色图

Hyperspectral imaging for the spectral measurement of

far-field beam divergence angle and

beam uniformity of a supercontinuum laser

高光谱成像用于超连续激光器远场光束发散角和光束均匀性的光谱测量

论文中所使用双利合谱产品：

便携式成像光谱系统

摘要：

A new novel method, hyperspectral imaging (HSI), is presented in this work to measure the beam divergence angle and beam profile uniformity of supercontinuum lasers. The obtained results of divergence angles are consistent with theoretically calculated values. The uniformity of different-size projected Gaussian beams was measured through referencing the data sets provided by HSI camera under the wavelength variation. HSI, compared with traditional methods, is much faster and capable of providing critical reference to supercontinuum output parameters measurements and practical application in far-field situation.

本文提出了一种新的测量超连续谱激光器光束发散角和光束轮廓均匀度的新方法——高光谱成像（HSI）。所获得的发散角结果与理论计算值一致。通过参考HSI相机提供的数据集，测量了不同尺寸投影高斯光束在波长变化下的均匀度。与传统方法相比，HSI速度更快，能够为超连续谱输出参数测量和远场情况下的实际应用提供关键参考。

DOI：

期刊：OPTICS EXPRESS

关键词：多光谱和高光谱成像；光子晶体光纤；激光器，光纤

图注：设备采集图

An active hyperspectral imaging system based on a multi-LED light source

基于多LED光源的主动高光谱成像系统

DOI:

发表期刊：Review of Scientific Instruments

论文中所使用双利合谱产品：

“盖亚”高光谱分选仪

摘要：

Hyperspectral imaging (HSI) is a popular method of substance identification and mapping in many fields. Light-emitting diodes (LEDs) can be introduced as an active light source, which have been widely used with the distinct advantages of small size, low energy consumption, long lifetime, and fast switching. In this paper, we propose an active HSI system that is based on a multi wavelength LED-array light source. This LED-based HSI system has a simple and stable configuration, without the complex dispersive spectrometer and mechanical scanning device. The proposed HSI system has been validated using the standard color checker, showing a reliable spectral performance. Moreover, the spatial-spectral information of Chinese paper-cuttings has been successfully extracted, which indicates the great potential in practicalapplications.

高光谱成像（HSI）是许多领域中流行的物质识别和映射方法。发光二极管（LED）可以作为主动光源引入，其具有体积小、能耗低、寿命长和切换速度快等明显优势，已被广泛使用。本文提出了一种基于多波长LED阵列光源的主动HSI系统。这种基于LED的HSI系统配置简单稳定，无需复杂的色散光谱仪和机械扫描装置。所提出的HSI系统已使用标准颜色检查器进行了验证，显示出可靠的光谱性能。此外，中国剪纸的空间光谱信息已成功提取，这表明在实际应用中具有巨大的潜力。

DOI：

期刊：Review of Scientific Instruments

图注：基于 LED 的主动式 HSI 系统在中国剪纸光谱曲线

相关产品推荐

高光谱分选仪

便携式成像光谱系统

每一篇论文都是科研人员智慧的结晶，也是双利合谱与客户携手共进的见证。期待通过“论文速递”栏目，与您共同见证高光谱成像技术在科研领域的每一次突破，分享科研人员的智慧结晶。让我们一起探索高光谱成像技术的无限可能，推动行业的发展与进步。欢迎关注双利合谱“论文速递”栏目，更多精彩论文敬请期待！