Graded photonic crystals curve the flow of light: An experimental demonstration by the mirage effect

Akmansoy, É.; Centeno, Emmanuel; Vynck, Kevin; Cassagne, D.; Lourtioz, Jean‐Michel

doi:10.1063/1.2901684

Cited by 56 publications

(34 citation statements)

References 8 publications

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“…Excellent performance can even be obtained using materials with low dielectric constant (i.e., ε r < 3.0) that are usually less expensive and more commonly available than more exotic dielectrics with higher permittivity. Alternative techniques for spatial control of waves within a lattice include structures produced by transformation optics [45], waveguides [46,47], graded-index devices [48][49][50], introduction of defects [43], and graded photonic crystals [51][52][53][54][55]. Spatially-variant self-collimation is unique because it spatially varies the orientation of the unit cells within an otherwise monolithic and uniform lattice.…”

Section: Introductionmentioning

confidence: 99%

3d Printed Lattices With Spatially Variant Self-Collimation

Rumpf¹,

Pazos²,

Garcia³

et al. 2013

PIER

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Abstract-In this work, results are given for controlling waves arbitrarily inside a lattice with spatially variant self-collimation. To demonstrate the concept, an unguided beam was made to flow around a 90 • bend without scattering due to the bend or the spatial variance. Control of the field was achieved by spatially varying the orientation of the unit cells throughout a self-collimating photonic crystal, but in a manner that almost completely eliminated deformations to the size and shape of the unit cells. The device was all-dielectric, monolithic, and made from an ordinary dielectric with low relative permittivity (ε r = 2.45). It was manufactured by fused deposition modeling, a form of 3D printing, and its performance confirmed experimentally at around 15 GHz.

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Section: Introductionmentioning

confidence: 99%

3d Printed Lattices With Spatially Variant Self-Collimation

Rumpf¹,

Pazos²,

Garcia³

et al. 2013

PIER

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“…In this paper, we show that a properly designed slab of chirped PhCs can enable an extremely large number of flat bands that are characterized by large g n and cause multiple narrow peaks of perfect transmission at a reasonable total thickness, leading to quite compact performances. The studied chirped PhCs are different than those usually studied, e.g., see [21][22][23][24][25][26]. In particular, the present PhCs are symmetric with respect to the mid-plane, while the focus here is on propagation in the direction of the variation of structural parameters.…”

mentioning

confidence: 88%

“…Generally speaking, various chirped structures, which are in some sense intermediate between periodic and disordered ones, have a rich potential in obtaining the desired dispersion, transmission, and scattering properties. For example, the potential of gradual variation of material characteristics in the design of complex photonic structures has recently been demonstrated in the framework of the Transformation Optics approach [21][22][23]. A large class of the graded-index PhCs has been studied with the emphasis placed on propagation in the direction perpendicular to that of the variation of structural parameters, e.g., for focusing and coupler applications [24][25][26].…”

mentioning

confidence: 99%

Multiple slow waves and relevant transverse transmission and confinement in chirped photonic crystals

Serebryannikov¹,

Cakmak²,

Çolak³

et al. 2014

Opt. Express

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Abstract:The dispersion properties of rod-type chirped photonic crystals (PhCs) and non-channeled transmission in the direction of the variation of structural parameters from one cell of such a PhC to another are studied. Two types of configurations that enable multiple slow waves but differ in the utilized chirping scheme are compared. It is demonstrated that the multiple, nearly flat bands with a group index of refraction exceeding 180 can be obtained. For these bands, transmission is characterized by multiple narrow peaks of perfect transmission, strong field enhancement inside the slab, and large values of the Q-factor. Among the bands, there are some that show negative phase velocity. Symmetry with respect to the slab mid-plane must be kept in order to obtain constructive interferences that are necessary for reflection-free transmission. It is shown that 15 and more slow wave bands can be obtained in one configuration. The corresponding transmission peaks are well separated from each other, being the only significant feature of the transmission spectrum, while the Q-factor can exceed 10 5 . The observed features are preserved in a wide range of the incidence angle variation. They can be used for tuning the locations and spectral widths of the transmission peaks. Some comparisons with the chirped multilayer structures have been carried out.

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“…One example for refractive index profile is the gratings that may be permanently or temporarily created by interferences of two or more beams. By creating the gratings into PhCs, one can control and manipulate the light, i.e., optical signal (Chen et al 2007;Akmansoy et al 2008;Liu et al 2009;Vigneron and Lousse 2007).…”

Section: Introductionmentioning

confidence: 99%

Interference grating structures in photonic crystal circuits

Karakilinc

Dinleyici

2011

Opt Quant Electron

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Photonic Crystal Circuits have been widely investigated for various optoelectronics device applications. And the gratings in photonics devices are indispensable tool, which is very common for light manipulation. In this study, an interference grating structure formed by Gaussian beam interferences in photonic crystal waveguide such that having Kerr type nonlinearity is proposed and its transmission characteristics are investigated. FiniteDifference Time-Domain method is used to analyze the device characteristics. According to simulation results, the interference grating has shown special transmission characteristics that can bring tunability for photonic crystal devices. This can be an effective method for controlling optical signals in the photonic crystal for all optical switching/routing applications as a part of add/drop multiplexing.

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Graded photonic crystals curve the flow of light: An experimental demonstration by the mirage effect

Cited by 56 publications

References 8 publications

3d Printed Lattices With Spatially Variant Self-Collimation

3d Printed Lattices With Spatially Variant Self-Collimation

Multiple slow waves and relevant transverse transmission and confinement in chirped photonic crystals

Interference grating structures in photonic crystal circuits

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