| 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.Applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application[J].Optoelectronics Letters,2021,17(5):298-301 |
| Applied whispering gallery modes on ZnO nanorods coated glass for humidity sensing application |
| Author Name | Affiliation | | Mohd Hafiz Jali | Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
Faculty of Electrical Engineering, Universiti Teknikal Malaysia Melaka, Melaka 76100, Malaysia | | Hazli Rafis Abdul Rahim | Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Melaka 76100, Malaysia | | Md Ashadi Md Johari | Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia | | Maslinda Mat Sharif | Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia | | Siti Halma Johari | Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia | | Siddharth Thokchom | School of Technology, Assam Don Bosco University, Guwahati, Assam 781017, India | | Habibah Mohamed | Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur 54100, Malaysia | | Moh Yasin | Department of Physics, Faculty of Science and Technology, Airlangga University, Surabaya, Indonesia | | ，Sulaiman Wadi Harun | Department of Electrical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia |
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| Abstract: |
| 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 ?m and the glass surface 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 0.014 2 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. |
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