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Proceedings Paper

Characterization of Si-disk magnetic nanoprobe by photoinduced force microscopy (Conference Presentation)

Paper Abstract

Due to the weak magnetic responsibility of natural existing materials at optical frequency, optical magnetism remains a “dark state” of light which is largely unexplored. However, optical magnetism is also very desirable because of the many splendid possibilities it may lead to, including ultra-compact opto-magnetic storage devices, high speed magnetic imaging, magnetic tweezers etc. Here we design a Si nano-disk structure as the magnetic nanoprobe which supports magnetic resonance in visible range with the incident azimuthally polarized beam (APB). APB features a donut shape beam profile, with a strong longitudinal magnetic field and a vanishing electric field at the beam axis. Therefore, on the magnetic resonance while the probe is aligned to the APB axis, a longitudinal magnetic dipole is excited in the probe, and interacts with the incident APB inducing an exclusive magnetic force. Making such magnetic nanoprobe under APB illumination serves as an important first step to realize the proposed photoinduced magnetic force microscopy (PIMFM), which selectively exploits the interaction between matter and the magnetic field of light to characterize the optical magnetism in nanoscale. Such investigation of the optical magnetism in samples is dearly needed in many mechanical, chemical, and life-science applications.

Paper Details

Date Published: 21 September 2017
Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103430K (21 September 2017); doi: 10.1117/12.2273050
Show Author Affiliations
Jinwei Zeng, Univ. of California, Irvine (United States)
Mohsen Rajaei, Univ. of California, Irvine (United States)
Mahsa Darvish, Univ. of California, Irvine (United States)
Mohammad Albooyeh, Univ. of California, Irvine (United States)
Brian Albee, Univ. of California, Irvine (United States)
Hemantha K. Wickramasinghe, Univ. of California, Irvine (United States)
Eric O. Potma, Univ. of California, Irvine (United States)
Filippo Capolino, Univ. of California, Irvine (United States)

Published in SPIE Proceedings Vol. 10343:
Metamaterials, Metadevices, and Metasystems 2017
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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