Metal-dielectric waveguide structure supporting an evanescent wave with long propagation distance in an aqueous environment

Meng, Fanfei; Du, Luping; Yang, Aiping; Wei, Shibiao; Lei, Ting; Zhang, Douguo; Yuan, Xiaocong

doi:10.1088/1361-6463/aa881f

Cited by 8 publications

(3 citation statements)

References 35 publications

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“…The image captured by CCD1 (figure 3(b)) features a sharp dark ring indicating that the TE mode is excited because of the full beam TE nature of the AP beam incidence. This mode coincides with the estimated angular dependence of light reflection (figure 3(a)), which is derived from the transfer matrix theory in a multilayer system, which is the MDW structure in this scenario [10]. Moreover, when choosing a silicon nanoparticle, a dark field CCD is employed as the monitor (figure 3(c)).…”

Section: Resultssupporting

confidence: 84%

“…For example, near-field scanning optical microscopy (NSOM)-a commercialized near-field mapping techniqueuses sophisticated probes to image the transverse or longitudinal electric field components surrounding nanostructures [6,7]. Our previous work presented a near field mapping technique to extract the longitudinal electric-field component of surface waves by employing a metal-nanoparticle-basedprobe [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mapping the near-field distribution of magnetic fields using a silicon nanoparticle at optical frequencies

Meng¹,

Yang²,

Shi³

et al. 2019

J. Phys. D: Appl. Phys.

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Mapping the near-field distribution of vector-field components, including those of the electric and magnetic fields, is crucial for understanding the intricate physical processes in the near field. However, imaging the near field of magnetic fields is challenging. We propose a flexible technique for mapping the longitudinal magnetic field using a nano-antenna probe. Unlike traditional techniques for mapping the near field of the magnetic field with a symmetry breaking probe, the magnetic resonances of silicon nanoparticles are analyzed and the directionally scattered light is extracted to reconstruct the longitudinal magnetic field distribution. An artificial mapping system is set up to verify whether the longitudinal magnetic component can be mapped. Using this technique, the conversion of spin angular momentum to orbital angular momentum is also demonstrated. The potential application of this technique is the full vector-field mapping of the electromagnetic fields and the near-field visualization of physical processes.

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Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Mapping the near-field distribution of magnetic fields using a silicon nanoparticle at optical frequencies

Meng¹,

Yang²,

Shi³

et al. 2019

J. Phys. D: Appl. Phys.

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“…Then, we analyze the focusing properties for the four layers MDW structure. 40,41) By carefully choosing the thickness of dielectric and metal layers, there can only be TE mode in the dielectric/water interface.…”

mentioning

confidence: 99%

Optical manipulation with electric and magnetic transverse spin through multilayered focused configuration

Shi¹,

Du²,

Yuan³

2019

Appl. Phys. Express

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We theoretically analyzed the electric and magnetic transverse spin properties of the highly focused cylindrical vector beams under a multilayered configuration, which revealed a rich nontrivial structure of local spin densities and exhibited a potential applications in optical manipulation for non-magnetic and magnetic particles. An isolation-metal-isolation structure can trap non-magnetic particles with the electric field force and achieve rotation owing to the electric transverse spin, while a metal–dielectric waveguide enables a magnetic transverse spin and hence achieves trapping and rotation of magnetic particles. Various topological charge and materials were analyzed to modulate the optical torques for multiparticles manipulation.

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Measuring the magnetic topological spin structure of light using an anapole probe

Meng

Yang

et al. 2022

Light Sci Appl

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Topological spin structures of light, including the Skyrmion, Meron, and bi-Meron, are intriguing optical phenomena that arise from spin–orbit coupling. They have promising potential applications in nano-metrology, data storage, super-resolved imaging and chiral detection. Aside from the electric part of optical spin, of equal importance is the magnetic part, particularly the H-type electromagnetic modes for which the spin topological properties of the field are dominated by the magnetic field. However, their observation and measurement remains absent and faces difficult challenges. Here, we design a unique type of anapole probe to measure specifically the photonic spin structures dominated by magnetic fields. The probe is composed of an Ag-core and Si-shell nanosphere, which manifests as a pure magnetic dipole with no electric response. The effectiveness of the method was validated by characterizing the magnetic field distributions of various focused vector beams. It was subsequently employed to measure the magnetic topological spin structures, including individual Skyrmions and Meron/Skyrmion lattices for the first time. The proposed method may be a powerful tool to characterize the magnetic properties of optical spin and valuable in advancing spin photonics.

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Metal-dielectric waveguide structure supporting an evanescent wave with long propagation distance in an aqueous environment

Cited by 8 publications

References 35 publications

Mapping the near-field distribution of magnetic fields using a silicon nanoparticle at optical frequencies

Mapping the near-field distribution of magnetic fields using a silicon nanoparticle at optical frequencies

Optical manipulation with electric and magnetic transverse spin through multilayered focused configuration

Measuring the magnetic topological spin structure of light using an anapole probe

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