Applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application

• 作者: Mohd Hafiz Jali Hazli Rafis Abdul Rahim Md Ashadi Md Johari Maslinda Mat Sharif Siti Halma Johari Siddharth Thokchom Habibah Mohamed Moh Yasin Sulaiman Wadi Harun
• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: Devices
• 页码范围: 298-301
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-021-0109-3

摘要

In this letter,a humidity sensor is demonstrated by applying a whispering gallery mode (WGM) from a microsphere resonator onto the ZnO nanorods coated glass surface.The diameter of the microsphere was 234 μm and the glass sur-face was coated with ZnO nanorods using the hydrothermal method at growth duration of 12 h.A significant response to humidity level ranging from 35％RH to 85％RH has been observed with the sensitivity of 0.0142 nm/％RH.The proposed humidity sensor has successfully employed to enhance interaction between the whispering gallery mode evanescent and surrounds analyte with the assistance of ZnO nanorods coated glass.