Experimental demonstration of self-collimation beaming and splitting in photonic crystals at microwave frequencies

Matthews, Aaron

doi:10.1016/j.optcom.2009.01.010

Cited by 13 publications

(8 citation statements)

References 22 publications

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“…Beaming (or self-collimation) of SPPs appears to have been first presented in the optical regime in 1999 8 . Since then, there have been a number of papers on this topic, both in the optical regime 9 – 12 and recently in the microwave range 13 – 15 .…”

Section: Introductionmentioning

confidence: 99%

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Strong beaming of microwave surface waves with complementary split-ring-resonator arrays

Young

Dockrey

Hibbins

et al. 2018

Sci Rep

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A thin copper sheet, populated by an array of complementary split ring resonators, presents strong surface wave beaming in orthogonal directions at two distinct frequencies. This simple array is significantly thinner than existing single frequency beaming surfaces. The observed beaming frequencies are associated with the two lowest resonance modes of the split rings, and the beams are subwavelength in width and approximately non-diverging. The beaming is analysed through comparison of near-field scans of the surface-normal electric fields with numerical simulations.

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Section: Introductionmentioning

confidence: 99%

“…Matthews 13 explored an array of ceramic cylinders, fixed onto a polystyrene support, used to produce self-collimation for a frequency of 7.64 GHz. The resulting beam width is approximately five times the incident wavelength.…”

Section: Introductionmentioning

confidence: 99%

Strong beaming of microwave surface waves with complementary split-ring-resonator arrays

Young

Dockrey

Hibbins

et al. 2018

Sci Rep

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“…Three-dimensional photonic crystals (PCs) have unique and complicated structures, which enable the manipulation of the flow of light [ 1 , 2 ]. Furthermore, the special dispersion properties of PCs could produce diverse fantastic, interesting, and anomalous refraction effects [ 3 , 4 , 5 ], including negative refraction [ 6 , 7 , 8 ], self-collimation [ 9 , 10 ], and a superprism effect [ 11 , 12 ]. Consequently, PCs have many important applications in various fields [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Silica Microspheres—Inspired by the Formation of Ice Crystals—With High Homogeneous Particle Sizes and Their Applications in Photonic Crystals

et al. 2018

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Silica microspheres (SMs) must possess the performances of desirable monodispersity, narrow particle size distribution, and high sphericity for preparing photonic crystals (PCs) and other materials such as microspheres reference material, etc. We have adopted the techniques of increasing reactant concentration and raising the temperature to improve the synthesis rate of SMs, gaining inspiration from the formation mechanism of ice crystals. SMs with uniform particle sizes (polydispersity index less than 0.05) and good spherical features were fabricated through homogeneous nucleation. The mathematical relationship between particle sizes of SMs and reactant concentrations is further fitted. High accuracy of the regression equation is verified by an F-test and verification experiment. Highly ordered PCs (the stacking fault is about 1.5%, and the point defect is about 10−3) with dense stacked opal structures have been obtained by self-assembly of SMs. In addition, highly ordered PCs (the stacking fault is about 3%, and the point defect is about 10−3) with non-dense packed opal structure and inverse opal structure were successfully prepared. PCs of inverse opal structure were used to examine their response characteristics to identify ethanol, exhibiting good performance. Our research may provide significant inspiration for the development of other sorts of microspheres.

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“…The SC can benefit a large variety of applications related to wave guiding and light collection, e.g. waveguides for optical integrated circuits [21,22], beam splitters [23,24], optical switches [25], multiplexers [26], sensors [27], interferometers [28], wave plates [29], resonators [30,31], and logic gates [32,33]. The SC allows a narrow beam to propagate in the PC without engineered defects or physical channel and hence it may simplify fabrication of some PC-based devices.…”

Section: Introductionmentioning

confidence: 99%

An approach to achieve all-angle, polarization-insensitive and broad-band self-collimation in 2D square-lattice photonic crystals

Noori¹,

Soroosh²,

Baghban³

2015

Ukr. J. Phys. Opt.

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Abstract. We have investigated the possibility for achieving (in the same structure), an all-angle, polarization-insensitive and broad-band self-collimation (SC), one of the most urgent requirements in the field of optical integration. To obtain these attractive SC features in 2D square-array photonic crystals, we have used several strategies and performed testing calculations, using plane-wave expansion and finite-difference time-domain methods. We have not complicated the basic structure for the SC and ensured its simple geometry. The all-angle SC can arise when the optical material of a hole-type structure is high-index. Our results have testified that the SC in the hole-type structure is less dependent on the light polarization, if compared with a similar rod-type one. Our optimized SC structure has a bandwidth of Δf/f c = 2.61% and supports the all-angle SC for both TE and TM polarizations at the expense of small (~ 3) deviation of light from the unique collimation direction. Notice that the latter can be tolerated in many integrated optical devices.

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Experimental demonstration of self-collimation beaming and splitting in photonic crystals at microwave frequencies

Cited by 13 publications

References 22 publications

Strong beaming of microwave surface waves with complementary split-ring-resonator arrays

Strong beaming of microwave surface waves with complementary split-ring-resonator arrays

Synthesis of Silica Microspheres—Inspired by the Formation of Ice Crystals—With High Homogeneous Particle Sizes and Their Applications in Photonic Crystals

An approach to achieve all-angle, polarization-insensitive and broad-band self-collimation in 2D square-lattice photonic crystals

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