Photonic-crystal-based beam splitters

Bayındır, Mehmet; Temelkuran, Burak; Özbay, Ekmel

doi:10.1063/1.1332821

Cited by 200 publications

(72 citation statements)

References 26 publications

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“…[5][6][7][8][9] Such localized modes have a potential to be used as a high Q resonator [10][11][12][13][14][15] for various frequency ranges from the microwave range up to optical frequencies. A linearly extended defect can guide waves with high efficiency, thus allowing for the construction of beam splitters, 16,17 sharp bend waveguides, 18 -22 and coupling structures. [23][24][25] Photonic crystals that are periodic in two dimensions only ͑2D photonic crystals͒ can provide a band gap for every direction of propagation in the lattice plane of periodicity.…”

Section: Introductionmentioning

confidence: 99%

Controlled excitation of electromagnetic band-gap line and point defect modes at microwave frequencies

Schuster

Klein

2003

Journal of Applied Physics

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We report on the controlled excitation of line and point defect modes in a two-dimensional hexagonal electromagnetic band-gap structure made of rods of dielectric material ͑aluminium oxide͒. We compared simulation performed with a numerical field simulation software and experimental measurements at microwave frequencies with regard to coupling from external waveguides to line defects and subsequent coupling to resonant modes. We observed that for a line defect in the photonic crystal the impedance matching to a waveguide is strongly dependent on the defect width. We furthermore demonstrated that the coupling to a localized defect resonance can be strongly influenced by the variation of certain single lattice elements, affecting transmission behavior and quality factor of the resonant modes.

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Section: Introductionmentioning

confidence: 99%

Controlled excitation of electromagnetic band-gap line and point defect modes at microwave frequencies

Schuster

Klein

2003

Journal of Applied Physics

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“…As a variation of bends, structures that can split the path of light were also investigated [97,114].…”

Section: Photonic Crystals As Devices and Applicationsmentioning

confidence: 99%

Electromagnetic Wave Propagation in Two-Dimensional Photonic Crystals

Berman¹,

Boyko²,

Kezerashvili³

et al. 2011

Wave Propagation

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“…30 Yariv et al reformulated the same phenomenon in a simple way, and proposed various applications based on coupled-cavity structures. 33 Later, the mode splitting phenomena within the TB picture, 34 guiding and bending of EM wave, 10 heavy photons, 35 and EMbeam splitting and switching effect 47 were experimentally demonstrated in our group in three-dimensional photonic crystals at microwave frequencies. Very recently, Lan et al numerically proposed a switching mechanism by changing the positions of the sharp edges of the coupled-cavity band of 1D PBG structures 36 and delay lines for ultra short optical pulses 37 , and Olivier et al reported 2D CCWs at optical wavelengths.…”

Section: Localized Coupled-cavity Modes and The Tight Binding Approximentioning

confidence: 99%

Physics and Applications of Defect Structures in Photonic Crystals

Özbay

Bayındır

2003

Quantum Communication and Information Technologies

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Photonic crystals are three dimensional periodic structures having the property of reflecting the electromagnetic (EM) waves in all dimensions, for a certain range of frequencies. Defects or cavities around the same geometry can also be built by means of adding or removing material. The electrical fields in such cavities are usually enhanced, and by placing active devices in such cavities, one can make the device benefit from the wavelength selectivity and the large enhancement of the resonant EM field within the cavity. By using coupled periodic defects, we have experimentally observed a new type of waveguiding in a photonic crystal. A complete transmission was achieved throughout the entire waveguiding band. The transmission, phase, and delay time characteristics of the various coupled-cavity structures were measured and calculated. We observed the eigenmode splitting, waveguiding through the coupled cavities, splitting and switching of electromagnetic waves in waveguide ports, and Mach-Zender interferometer effect in such structures. The corresponding field patterns and the transmission spectra were obtained from the finite-difference-time-domain (FDTD) simulations. We developed a theory based on the classical wave analog of the tight-binding (TB) approximation in solid state physics. Experimental results are in good agreement with the FDTD simulations and predictions of the TB approximation.

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Photonic-crystal-based beam splitters

Cited by 200 publications

References 26 publications

Controlled excitation of electromagnetic band-gap line and point defect modes at microwave frequencies

Controlled excitation of electromagnetic band-gap line and point defect modes at microwave frequencies

Electromagnetic Wave Propagation in Two-Dimensional Photonic Crystals

Physics and Applications of Defect Structures in Photonic Crystals

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