Optical magnetic field microsensors based on GaN diode optopairs integrated with magnetic fluids

• Published in: Journal of lightwave technology Vol. 41; no. 15; pp. 1 - 6
• Main Authors: Chen, Jian, Zhu, Ling, Tang, Xinke, Li, Kwai Hei
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.08.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Detectors; Emitters; Gallium nitrides; GaN; magnetic field; Magnetic field measurement; Magnetic fields; magnetic fluid; Magnetic fluids; Magnetic liquids; Magnetic sensors; microsensor; Optical reflection; optoelectronic integration; Photoconductivity; Recesses; Sapphire; Substrates

In this work, the development of optical magnetic microsensors based on chip-scale GaN-on-sapphire diode optopairs integrated with magnetic fluids is demonstrated. The submillimeter-sized optopairs function as light emitters and detectors and the transparent sapphire substrate as light-guiding media...