Asl A Beheshti, Ahmadi H, Rostami A
Photonics and Nanocrystals Research Lab (PNRL), Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran.
SP-EPT Lab., ASEPE Company, Industrial Park of Advanced Technologies, Tabriz, Iran.
Sci Rep. 2023 Aug 28;13(1):14029. doi: 10.1038/s41598-023-41346-4.
Color detection is one of the top interests in both biological and industrial applications. Specifically, the Determination of the light wave characteristics is vital in photonic technology. One of the features in the color sense that should be found out is its wavelength or color. In this work, we propose a structure that can be used to detect RGB colors separately in an efficient way. The proposed detector consists of the plasmonic filter sensing desired wavelength (red, green, and blue) and the PN diode to convert the received photons to the electrical current. At the input intensity of 1 mW × cm, the current density for blue, green, and red colors are 27, 35, and 48 µA × cm, respectively. It is shown that the intensities needed to obtain the current densities of 0.1 µA × cm are 3.94, 2.98, and 2.25 µW × cm for the blue, green, and red spectra respectively. It should mention that by using high-precision photodetector structures such as PIN diode, the minimum detectable level can be decreased. Simple adjusting for desired wavelength and linear operation for different input intensities are the characteristics of the designed structure. This detector is compatible with CMOS technology and can be easily utilized in numerous applications, such as charge-coupled devices, displays, and cameras.
颜色检测是生物和工业应用中最受关注的领域之一。具体而言，光波特性的测定在光子技术中至关重要。在颜色感知中需要弄清楚的一个特征是其波长或颜色。在这项工作中，我们提出了一种结构，该结构可用于以高效的方式分别检测RGB颜色。所提出的探测器由用于感测所需波长（红色、绿色和蓝色）的等离子体滤波器和用于将接收到的光子转换为电流的PN二极管组成。在输入强度为1 mW×cm时，蓝色、绿色和红色的电流密度分别为27、35和48 μA×cm。结果表明，对于蓝色、绿色和红色光谱，获得0.1 μA×cm电流密度所需的强度分别为3.94、2.98和2.25 μW×cm。应该提到的是，通过使用诸如PIN二极管之类的高精度光电探测器结构，可以降低最小可检测水平。针对所需波长的简单调整以及针对不同输入强度的线性操作是所设计结构的特点。这种探测器与CMOS技术兼容，并且可以很容易地应用于许多应用中，如电荷耦合器件、显示器和相机。
