Concentration sensing system with monolithic InGaN/GaN photonic chips  

作　　者：Feifei Qin Xueyao Lu Yang Chen Xumin Gao Yue Cao Lei Zhang Junfeng Lu Xiaoxuan Wang Gangyi Zhu Yongjin Wang 秦飞飞;卢雪瑶;陈杨;高绪敏;曹越;张蕾;卢俊峰;王潇璇;朱刚毅;王永进(GaN Optoelectronic Integration International Cooperation Joint Laboratory of Jiangsu Province,College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;College of Physics and Key Laboratory of Aerospace Information Materials and Physics(MIIT),Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;State Key Laboratory of Digital Medical Engineering,School of Biological Science and Medical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]GaN Optoelectronic Integration International Cooperation Joint Laboratory of Jiangsu Province,College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China [2]College of Physics and Key Laboratory of Aerospace Information Materials and Physics(MIIT),Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China [3]State Key Laboratory of Digital Medical Engineering,School of Biological Science and Medical Engineering,Southeast University,Nanjing 210096,China

出　　处：《Chinese Optics Letters》2024年第6期170-176,共7页中国光学快报（英文版）

基　　金：supported by the Natural Science Foundation of Jiangsu Province (Nos.BK20210593 and BK20231441);the National Natural Science Foundation of China (No.62204127);the Fundamental Research Funds for the Central Universities (No.NS2022096)。

摘　　要：Using an identical monolithic InGaN/GaN light emitting diode (LED) array as the sensing module and a well-designed data processing module, we demonstrate a small-size concentration sensing prototype. Overlap between the emission and the response spectra of the InGaN/GaN LED makes each pair of LEDs in the arrayed chip form a sensing channel. The changes in liquid concentration can be transformed into variation of photocurrent. The system's sensing properties are further optimized by varying the position, number of receivers, and packaging reflectors. With methyl orange as a tracer agent, the sensing system's resolution is 0.286 μmol/L with a linear measurement region below 40 μmol/L.

关 键 词：InGaN/GaN diodes array liquid concentration sensing coexistence of luminescence detection 

分 类 号：TN312.8[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]