Refractive index less than two: photonic nanojets yesterday, today and tomorrow [Invited]

Luk’yanchuk, Boris; Paniagua‐Domínguez, Ramón; Minin, Igor V.; Minin, Oleg V.; Wang, Zengbo

doi:10.1364/ome.7.001820

Cited by 319 publications

(250 citation statements)

References 155 publications

(180 reference statements)

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“…The length l of the photonic hooks is also under the influence of n and j/m too. Figure 3 As to the traditional photonic jets, the ratios of the refractive indices between the dielectric particle to the surrounding medium (n/ns) should keep in the range of 1:1 to 2:1 [13], [22]. In the case of photonic hooks formed from the twin-ellipse microcylinder, the generation of the photonic hooks will be mainly affected by the n/ns, and slightly influenced by j/m.…”

Section: Resultsmentioning

confidence: 99%

“…This curved beam, with a laser and a light modulator, is easier to generate than an Airy beam [3]. The shape and field distribution of photonic hooks are depended on the geometry and refractive index of microparticle [10]- [13]. An asymmetric microparticle of which combining a wedge prism and a cuboid was used to generate the photonic hook.…”

Section: Introductionmentioning

confidence: 99%

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Twin Photonic Hooks Generated by Twin-Ellipse Microcylinder

Shen

Shao

et al. 2020

IEEE Photonics J.

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Recently, two special photonic jets, photonic hooks and twin photonic jets, have been proposed to deal with complex conditions in nanoscale manipulation. Photonic hooks are generated by a single light plane wave and an asymmetric microparticle, while the twin photonic jets are produced by two incident light beams. In this letter, we presented and demonstrate a method to combine photonic hooks and twin photonic jets. A single light plane wave and a symmetric microparticle, twin-ellipse microcylinder, are used in this research. The curvature degree, length and maximum E 2 filed enhancement of twin photonic hooks are varied significantly, with the change of refractive indices and shape of twin-ellipse microcylinder. And a liquid-immersed core-shell is built to achieve a flexible tunability. _____________________________ a) Electronic

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Twin Photonic Hooks Generated by Twin-Ellipse Microcylinder

Shen

Shao

et al. 2020

IEEE Photonics J.

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“…Moreover, there is a focusing effect perpendicular to the direction of the microfiber due to the focusing effect in the near field. 44 See the supplementary material for the time evolution of THz radiation. Figure 3(d) shows the normalized integrated power for both orientations of microfibers, where curves are normalized to aperture only [black curves in Fig.…”

Section: -5mentioning

confidence: 99%

Enhanced terahertz magnetic dipole response by subwavelength fiber

et al. 2018

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Dielectric sub-wavelength particles have opened up a new platform for realization of magnetic light. Recently, we have demonstrated that a dipole emitter by a subwavelength fiber leads to an enhanced magnetic response. Here, we experimentally demonstrate an enhanced magnetic dipole source in the terahertz frequency range. By placing the fiber next to the hole in a metal screen, we find that the radiation power can be enhanced more than one order of magnitude. The enhancement is due to the excitation of the Mie-type resonances in the fiber. We demonstrate that such a system is equivalent to a double-fiber system excited by a magnetic source. This coupled magnetic dipole and optical fiber system can be considered a unit cell of metasurfaces for manipulation of terahertz radiation and is a proof-of-concept of a possibility to achieve enhanced radiation of a dipole source in proximity of a sub-wavelength fiber. It can also be scaled down to optical frequencies opening up promising avenues for developing integrated nanophotonic devices such as nanoantennas or lasers on fibers. © 2018 Author (s)

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“…For instance, incorporation of high-index microsphere into flexible elastomers was reported to improve its durability and reusability for observations at a specific position [16,17]. Microsphere was coupled with a confocal microscope to improve the maximal resolvability to sub-50nm scale [18,19,20]. Furthermore, micro-lens nanoscopes in extraordinary forms were also demonstrated, such as nanoparticle-based metamaterial hemisphere superlens leading to white-lighting 45 nm resolution [21], and biological superlens using spider silks and cells [22,23].…”

Section: Introductionmentioning

confidence: 99%

Unibody microscope objective tipped with a microsphere: design, fabrication, and application in subwavelength imaging

et al. 2020

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Microsphere-based subwavelength imaging technique was first demonstrated in 2011. After nearly a decade of efforts, such technique has spawned numerous interests in fields such as laser nano-machining, imaging, sensing and biological detection. For wider industrial scale application of the technique, a robust, low-cost objective lens incorporating microsphere lens is highly desired and sought by many researchers. In this work, we demonstrate a unibody microscope objective lens formed by tipping a high-index microsphere onto a Plano-Convex lens and subsequently fitting them into a conventional objective lens. We call such new objective the Plano-Convex-Microsphere (PCM) objective, which resembles the appearance and operation of an ordinary microscope objective, while providing super-resolving power in discerning subwavelength nanoscale features in air condition. The imaging performance of PCM-objective along with the working distance has been systematically investigated. With the assistance of scanning process, larger area imaging is realized. The PCM-objective can be easily adaptive to many existing microscope systems and appealing for commercialization.

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Refractive index less than two: photonic nanojets yesterday, today and tomorrow [Invited]

Cited by 319 publications

References 155 publications

Twin Photonic Hooks Generated by Twin-Ellipse Microcylinder

Twin Photonic Hooks Generated by Twin-Ellipse Microcylinder

Enhanced terahertz magnetic dipole response by subwavelength fiber

Unibody microscope objective tipped with a microsphere: design, fabrication, and application in subwavelength imaging

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