Properties of a three-dimensional photonic jet

Lecler, Sylvain; Takakura, Yoshitate; Meyrueis, Patrick

doi:10.1364/ol.30.002641

Cited by 228 publications

(194 citation statements)

References 11 publications

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“…11,12 Photonic nanojets are high intensity, narrow, and non-evanescent beams located at the output surface of a lossless dielectric cylinder/sphere when it is illuminated with a plane wave, demonstrating the ability to obtain a resolution of λ0/3 using microspheres, below the diffraction limit. 13,14 Based on this, photonic nanojets have been studied using different properties of the dielectric structure such as non-spherical nanoparticles 15 and also graded index concepts have been applied. 16,17 Besides, experimental demonstration of the backscattering enhancement generated by photonic jets at microwave frequencies has been reported.…”

Section: Introductionmentioning

confidence: 99%

Terajets produced by dielectric cuboids

Pacheco‐Peña¹,

Beruete²,

Minin³

et al. 2014

Applied Physics Letters

113

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The capability of generating terajets using 3D dielectric cuboids working at terahertz (THz) frequencies (as analogues of nanojets in the infrared band) are introduced and studied numerically. The focusing performance of the terajets are evaluated in terms of the transversal full width at half maximum along x-and y-directions using different refractive indexes for a 3D dielectric cuboid with a fixed geometry, obtaining a quasi-symmetric terajet with a subwavelength resolution of ~0.46λ0 when the refractive index is n = 1.41. Moreover, the backscattering enhancement produced when metal particles are introduced in the terajet region is demonstrated for a 3D dielectric cuboid and compared with its 2D counterpart. The results of the jet generated for the 3D case are experimentally validated at sub-THz waves, demonstrating the ability to produce terajets using 3D cuboids.

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Section: Introductionmentioning

confidence: 99%

Terajets produced by dielectric cuboids

Pacheco‐Peña¹,

Beruete²,

Minin³

et al. 2014

Applied Physics Letters

113

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“…The emergence of photonic nanojets that appear on the shadow-side of illuminated cylindrical particles have been recently studied in very detail [1][2]. The possibility of undergoing the diffraction limit [3] can be useful for various applications such as scanning near-field optical microscopy (SNOM), high-resolution lithography, advanced optical (and magnetic) data storage schemes, for immersion lens microscopy and for the fluorescence imaging of living cells [4].…”

Section: Discussionmentioning

confidence: 99%

A simple coupled mode model for near band-edge phenomena in grated waveguides

et al. 2007

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Figure 2. Experimental transmittance of a grated waveguide and results calculated with the presented modelA simple coupled mode model for near band-edge phenomena in grated waveguides The paper presents a simple coupled mode model to describe near band-edge phenomena in the transmission spectra of waveguides with a section containing a rectangular grating. SummaryIt is well known that the features of the near band-edge transmission spectrum of a waveguide with a partly grated section (see figure 1) are dominated by the effects of strong dispersion. In this wavelength region sharp transmission peaks (see figure 2) are found corresponding to strong field enhancement inside the cavity, defined by the grated section. These phenomena can be explained by considering the grating section as a Fabry-Perot cavity for the grating mode(s) (strong reflection at the boundaries of the grating section), together with the dispersive properties of these modes which are composed of forward and backward moving fields.It is the aim of the paper to show that from the wavelength position of the near band-edge transmission peaks most of the relevant parameters of the grating device can be deduced. First it is argued that, due to the symmetry of the grating (with rectangular grooves) the modal reflection and transmission coefficients for the transitions are nearly real. Using the latter, the approximate shape of the near bandedge dispersion curve, defined by ( ) with the propagation constant and the wavelength, of the propagating grating modes can be deduced from the positions of the transmission peaks for a structure with a given grating length. Next, from the dispersion curve most of the relevant device parameters, such as width of the peaks, field enhancement, modal group velocity, group delay and peak position as a function of the length of the grated section can be derived in good approximation. The presented theory is illustrated with numerical calculations and results of experiments on waveguides with grated sections. Particles shaped as e.g. spheres and ellipses with different refractive indices have been studied under plane wave illumination using simulation tools such as 2D-FDTD and 3D-MMP. For specific conditions the power distribution in the vicinity of the particle's opposite boundary has resulted in a tightly-focused photonic nanojet. Molding the Emission of Photonic Nanojets by Different Particle Shapes SummaryThe emergence of photonic nanojets that appear on the shadow-side of illuminated cylindrical particles have been recently studied in very detail [1][2]. The possibility of undergoing the diffraction limit [3] can be useful for various applications such as scanning near-field optical microscopy (SNOM), high-resolution lithography, advanced optical (and magnetic) data storage schemes, for immersion lens microscopy and for the fluorescence imaging of living cells [4].In this paper, we report on the optimization of various dielectric particle shapes with respect to a highly confined power distribution in the resulting n...

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“…[47][48][49]. Plane waves can be regarded as Gaussian beams with n = m LG = 0 and sufficiently small focusing parameter, f ≪ 1, which is defined after Eq.…”

Section: A Photonic Nanojetsmentioning

confidence: 99%

Mie scattering of Laguerre-Gaussian beams: Photonic nanojets and near-field optical vortices

Kiselev

Plutenko

2014

Phys. Rev. A

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We study Mie light scattering of Laguerre-Gaussian (LG) beams remodelled using the method of far-field matching. The theoretical results are applied to examine the optical field in the near-field region for purely azimuthal LG beams characterized by the nonzero azimuthal mode number m LG . The mode number m LG is found to have a profound effect on the morphology of photonic nanojets and the near-field structure of optical vortices associated with the components of the electric field.

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Properties of a three-dimensional photonic jet

Cited by 228 publications

References 11 publications

Terajets produced by dielectric cuboids

Terajets produced by dielectric cuboids

A simple coupled mode model for near band-edge phenomena in grated waveguides

Mie scattering of Laguerre-Gaussian beams: Photonic nanojets and near-field optical vortices

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