光电探测器
等离子体子
光电子学
光学
材料科学
分光计
小型化
带宽(计算)
物理
计算机科学
电信
纳米技术
作者
Shaoxiong Wu,Cheng Chen,Y. Dai,Jiayi Ye,Xialing Xu,Xinyu Liu,Feng Tian,Yonggang Xu,Huan Hu
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-09-18
卷期号:48 (19): 4965-4965
摘要
Computational algorithms have facilitated the miniaturization of spectrometers, which is essential for on-chip and portable applications. A plasmonic Schottky photodetector provides a filter-free and CMOS-compatible scheme for spectral measurement. In this study, we report on a direct-detected spectral analysis based on an integrated vertically coupled plasmonic nanostructure Schottky photodetector. We demonstrate that the plasmonic Schottky photodetector has a fast response with a –3 dB bandwidth of 600 kHz and a high peak detectivity of 8.65 × 10 10 Jones. By designing a deep neural network (DNN), we demonstrate the reconstruction of the unknown spectrum with a mean square error (MSE) of 1.57 × 10 −4 at a broad operating wave band of 450–950 nm, using only 20 distinct devices. Moreover, the spectral resolution of the 20 devices can reach to 7 nm. These findings provide a promising route for the development of chip-integrated spectrometers with high spectral accuracy and optical performance.
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