Home > Press > Spin photonics to move forward with new anapole probe
![]() |
CREDIT by Fanfei Meng, Aiping Yang, Kang Du, Fengyang Jia, Xinrui Lei, Ting Mei, Luping Du, and Xiaocong Yuan |
Abstract:
Topological nontrivial spin textures are intriguing in various physical systems, ranging from high energy to condensed matter physics. The magnetic Skyrmions formed by a swirling magnetization in magnetic materials have potential applications in high-density magnetic information storage and transfer. Moreover, photonic analogues of magnetic Skyrmions were proposed and demonstrated recently in both 2D and 3D forms. The deep-subwavelength features of spin structures provide novel tools for optical metrology, including high-precision displacement sensing and monitoring of magnetic domains.
In a new paper published in Light Science & Applications, a team of scientists led by Professors Luping Du and Xiaocong Yuan from Shenzhen University have developed a unique anapole probe to measure the photonic spin structures dominated by magnetic fields. Their paper, "Measuring the magnetic topological spin structure of light using an anapole probe," indicated that their proposed methods could be valuable in advancing spin photonics.
The previous Skyrmion structures of light were observed in surface plasmon polaritons with electric fields dominating their wave properties. Many approaches have been proposed to map the electric-field distributions at near field, including fluorescence imaging, photoemission electron microscopy and near-field scanning optical microscopy (NSOM) with fiber probes or nanoscatters.
In addition to the electric part in optical spin, the magnetic part is essential for transverse electric (TE) modes (H-type waves). Although several near-field mapping techniques have been developed for characterizing the magnetic fields, either using an NSOM probe with specific apex or high refractive index nanoparticles, they succumb to inevitable influences from the electric field. It would affect the vector properties of the measured magnetic field and impair the system's robustness in characterizing the topological spin properties associated with the magnetic fields. The anapole mode of nanoparticles with pure magnetic field response might be a great solution. It has drawn much attention to near-field optics and nano-optics.
The researchers proposed a unique magnetic probe with an anapole mode (hereafter named the anapole probe). It would help measure the topological spin structures of evanescent waves governed by magnetic fields. The probe comprises an Ag-core and Si-shell nanosphere, for which the excited electric dipole and toroidal dipole modes experience destructive interference. The anapole forms the anapole mode and suppresses scattered radiation caused by electric fields. This anapole mode overlaps with a strong magnetic dipole resonance, which guarantees a high detection efficiency of the magnetic field.
A home-built near-field scanning system utilizing the anapole probe was assembled and with which the magnetic topological spin structures of the TE mode were characterized for the first time, including individual photonic Skyrmions and Skyrmion/Meron lattices. With high sensitivity and precision, the proposed method may become a valuable tool for studying the underlying physical processes related to the magnetic field components of light and facilitate the development of applications, including data storage, metrology, optical tweezers, and chiral nanoscopy.
####
For more information, please click here
Contacts:
Media Contact
Yaobiao Li
Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS
Office: 86-431-861-76851
Expert Contact
Luping Du
Shenzhen University, China
Copyright © Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS
If you have a comment, please Contact us.Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
Related Links |
Related News Press |
2 Dimensional Materials
New 2D multifractal tools delve into Pollock's expressionism January 17th, 2025
FSU researchers develop new methods to generate and improve magnetism of 2D materials December 13th, 2024
News and information
Flexible electronics integrated with paper-thin structure for use in space January 17th, 2025
Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025
Magnetism/Magnons
Enhancing transverse thermoelectric conversion performance in magnetic materials with tilted structural design: A new approach to developing practical thermoelectric technologies December 13th, 2024
FSU researchers develop new methods to generate and improve magnetism of 2D materials December 13th, 2024
Three-pronged approach discerns qualities of quantum spin liquids November 17th, 2023
Study on Magnetic Force Microscopy wins 2023 Advances in Magnetism Award: Analysis of finite size effects reveals significant consequences for density measurements November 3rd, 2023
Skyrmions
Scientists use heat to create transformations between skyrmions and antiskyrmions January 12th, 2024
Possible Futures
Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025
The National Space Society Congratulates SpaceX on Starship’s 7th Test Flight: Latest Test of the Megarocket Hoped to Demonstrate a Number of New Technologies and Systems January 17th, 2025
Spintronics
Quantum materials: Electron spin measured for the first time June 9th, 2023
Chip Technology
Enhancing transverse thermoelectric conversion performance in magnetic materials with tilted structural design: A new approach to developing practical thermoelectric technologies December 13th, 2024
Bringing the power of tabletop precision lasers for quantum science to the chip scale December 13th, 2024
Nanofibrous metal oxide semiconductor for sensory face November 8th, 2024
Optical computing/Photonic computing
Groundbreaking research unveils unified theory for optical singularities in photonic microstructures December 13th, 2024
Groundbreaking precision in single-molecule optoelectronics August 16th, 2024
Sensors
Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025
Beyond wires: Bubble technology powers next-generation electronics:New laser-based bubble printing technique creates ultra-flexible liquid metal circuits November 8th, 2024
Nanotechnology: Flexible biosensors with modular design November 8th, 2024
Discoveries
Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025
Announcements
Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025
The National Space Society Congratulates SpaceX on Starship’s 7th Test Flight: Latest Test of the Megarocket Hoped to Demonstrate a Number of New Technologies and Systems January 17th, 2025
Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters
Flexible electronics integrated with paper-thin structure for use in space January 17th, 2025
Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025
Photonics/Optics/Lasers
Bringing the power of tabletop precision lasers for quantum science to the chip scale December 13th, 2024
Researchers succeed in controlling quantum states in a new energy range December 13th, 2024
Groundbreaking research unveils unified theory for optical singularities in photonic microstructures December 13th, 2024
![]() |
||
![]() |
||
The latest news from around the world, FREE | ||
![]() |
![]() |
||
Premium Products | ||
![]() |
||
Only the news you want to read!
Learn More |
||
![]() |
||
Full-service, expert consulting
Learn More |
||
![]() |