Session: 13-03-01: Computational Studies on MEMS and Nanostructures

Paper Number: 146051

146051 - A Microlaser-Based Magnetic Field Sensor 

Dye-doped polymer-based microlasers are recognized for their sensitivity and low-threshold lasing, making them highly effective sensors. However, their non-magnetic nature limits their deployment in hard-to-reach areas. Magnetic microspheres offer a solution to this limitation because of their easy maneuverability. The study investigates the elastic deformation of microlasers and the resulting shift in optical modes induced by magnetic field. In this study, a magnetic field sensor using a microlaser is developed. The microlaser is composed of NBA 107 UV curable polymer, rhodamine 6G dissolved in an ethanol solution, and Fe₂NiO₄ nanopowder with a size of <50 nm. A Helmholtz coil is employed to generate a magnetic field, which induces deformation in the microlaser. This deformation alters the optical path of the light, leading to a shift in the position of the laser modes. This shift can be utilized to detect the strength of the surrounding magnetic field. The microlaser is excited using a Q-switched Nd:YAG laser. The light emitted from the microlaser is then collected using an optical spectrometer that is connected to a cooled CCD camera. Preliminary calibration experimental curves correlating the external magnetic field with the shift of the laser modes are shown herein.

Presenting Author: Md Nazmus Sakib university of north texas

Presenting Author Biography: PhD student in mechanical engineering at UNT.

Authors:

Md Nazmus Sakib university of north texas
Maurizio Manzo university of north texas