Optomagnetic forces on YIG/YFeO3 microspheres levitated in chiral hollow-core photonic crystal fibre

2024/04/24 by Soumya Chakraborty, Chakraborty, Soumya, G. K. L. Wong +21
Engineering · #Advanced Fiber Optic Sensors #Applied Physics (physics.app-ph) #FOS: Physical sciences #Optics (physics.optics) #Photonic Crystal and Fiber Optics #Photonic and Optical Devices

paper · pdf · doi:10.48550/arxiv.2404.16182

openalex publication_date 2024/04/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We explore a magnetooptomechanical system consisting of a single magnetic microparticle optically levitated within the core of a helically twisted single-ring hollow-core photonic crystal fibre. We use newly-developed magnetic particles that have a core of antiferromagnetic yttrium-ortho-ferrite (YFeO3) and a shell of ferrimagnetic YIG (Y3Fe5O12) approximately 50 nm thick. Using a 632.8 nm probe beam, we observe optical-torque-induced rotation of the particle and rotation of the magnetization vector in presence of an external static magnetic field. This one-of-a-kind platform opens a path to novel investigations of optomagnetic physics with levitated magnetic particles.

Related

• Prospects of phase-adaptive cooling of levitated magnetic particles in a hollow-core photonic-crystal fibre
• Simultaneous optical trapping and magnetic micromanipulation of ferromagnetic iron-doped upconversion microparticles in six degrees of freedom
• Light-induced rotation of dielectric microparticles around an optical\n nanofiber
• Ferromagnetic levitation and harmonic trapping of a milligram-scale Yttrium Iron Garnet sphere
• Photonic crystal cavities based on suspended yttrium iron garnet nanobeams