Tailoring optical complex field with spiral blade plasmonic vortex lens

Rui, Guanghao; Zhan, Qiwen; Cui, Yiping

doi:10.1038/srep13732

Cited by 32 publications

(19 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For any observation point ( R, ϕ, z ) near the PV center, the contribution from a certain point ( r, φ, z ) on the groove is given by2431…”

Section: Resultsmentioning

confidence: 99%

“…Modifying the structure of the ASG is quite intuitive and has already been investigated by some groups before2324. With fixed incident λ , if the distance between point A and B in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Owning to the near field properties of plasmonics17, PVs are quite suitable for manipulating light-matter interactions, revealing many fundamental phenomena and applications, such as optical lattice formation18, spin-Hall effect19, spin symmetry breaking20, polarization analyzing21 and micro particle rotating/trapping22. In addition to integer PVs, fractional PVs have also been analytically investigated recently2324. However, previously proposed methods2324 for sculpturing fractional PVs cannot be dynamically tunable in practice.…”

mentioning

confidence: 99%

“…In addition to integer PVs, fractional PVs have also been analytically investigated recently2324. However, previously proposed methods2324 for sculpturing fractional PVs cannot be dynamically tunable in practice. Besides, it is still lack of an explicit analytical description for fractional PVs until now and the actual mean OAM of a fractional PV is still unknown, while the spatial optical vortices with fractional OAM have been clearly investigated already252627.…”

mentioning

confidence: 99%

“…, modifying the chiral plasmonic structures2324 or tuning the freespace wavelength λ of incident LG beam23, it is suggested that our proposed method of utilizing the propagation induced radial phase gradient of LG beam is a promising candidate to sculpture PVs from integer to fractional OAM dynamically. Specifically, spherical wave like behavior of LG beam would induce radially gradient to phase profile during propagation128.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Dynamically sculpturing plasmonic vortices: from integer to fractional orbital angular momentum

Wang

Zhao

Feng

et al. 2016

Sci Rep

View full text Add to dashboard Cite

As a fundamental tool for light-matter interactions, plasmonic vortex (PV) is extremely useful due to the unique near field property. However, it is a pity that, up to now, the orbital angular momentum (OAM) carried by PVs could not be dynamically and continuously tuned in practice as well as the properties of fractional PVs are still not well investigated. By comparing with two previously reported methods, it is suggested that our proposal of utilizing the propagation induced radial phase gradient of incident Laguerre-Gaussian (LG) beam is a promising candidate to sculpture PVs from integer to fractional OAM dynamically. Consequently, the preset OAM of PVs could have four composing parts: the incident spin and orbital angular momentum, the geometric contribution of chiral plasmonic structure, and the radial phase gradient dependent contribution. Moreover, an analytical expression for the fractional PV is derived as a linear superposition of infinite numbers of integer PVs described by Bessel function of the first kind. It is also shown that the actual mean OAM of a fractional PV would deviate from the preset value, which is similar with previous results for spatial fractional optical vortices.

show abstract

“…For any observation point ( R, ϕ, z ) near the PV center, the contribution from a certain point ( r, φ, z ) on the groove is given by2431…”

Section: Resultsmentioning

confidence: 99%

“…Modifying the structure of the ASG is quite intuitive and has already been investigated by some groups before2324. With fixed incident λ , if the distance between point A and B in Fig.…”

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Dynamically sculpturing plasmonic vortices: from integer to fractional orbital angular momentum

Wang

Zhao

Feng

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

Spin‐Symmetry‐Selective Generation of Ultracompact Optical Vortices in Nanoapertures without Chirality

et al. 2020

View full text Add to dashboard Cite

Nanoscale optical vortices (OVs) carrying orbital angular momenta can be generated via photonic spin–orbit interaction (SOI) in nanostructures and have important applications in many emerging fields such as quantum communication and optical manipulations. Existing OV generators such as metasurfaces and chiral structures suffer from discontinuous wavefront modulation, single‐spin response, and bulk size. The photonic SOI in highly symmetric structures has been overlooked. Furthermore, there is no experimental study on the near‐field formation mechanism of nanoscale OVs. Here, by studying the SOI in a plasmonic annular nanoaperture, a simple and reliable way for generating ultracompact OVs and OV array in nanoapertures without chirality is reported. The generation of a 3 × 3 OV array within a small area of 6 × 6 μm2 is demonstrated experimentally. Using a homemade spin‐selective and phase‐resolved near‐field microscopic system, in the spin basis, the dynamic evolution of the wavefront of the generated OV is directly probed from the near field to the far field with subwavelength resolution, which intuitively reveals the SOI process. The findings provide a simple and effective solution for large‐scale, low‐cost OV beam generation and offer a powerful tool for experimental exploration of the nanoscale photonic SOI.

show abstract