Results 11 to 20 of about 15,815 (311)
Band gap of silicon photonic crystal with square-lattice and windmill-shaped defects
Results in Physics, 2021 A new type of 2D square-lattice photonic crystal with different windmill-shaped defects is proposed. Based on the plane wave expansion method and super cell theory, the band gaps of defect models are numerically analyzed according to the symmetry. We aim
Liqiang Zhang +4 more
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Research progress of photonic crystals in photocatalysis
Cailiao gongcheng, 2021 Photonic crystals are dielectric structure materials with photonic band gaps which are composed of matters with different dielectric constants and arranged in space periodically.
CHU Zhao-ran +4 more
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Metallic photonic band-gap materials [PDF]
Physical Review B, 1995 We calculate the transmission and absorption of electromagnetic waves propagating in two-dimensional (2D) and 3D periodic metallic photonic band-gap (PBG) structures. For 2D systems, there is substantial difference between the {ital s}- and {ital p}-polarized waves. The {ital p}-polarized waves exhibit behavior similar to the dielectric PBG`s. But, the
Sigalas, Michael M. +3 more
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Results in Physics, 2020 A novel windmill-like-shaped defect was introduced in two-dimensional square-lattice photonic crystals consisting of circular dielectric rods. The photonic band gap (PBG) and defect modes were numerically analyzed using the plane wave expansion method ...
Daohan Ge +5 more
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Location and Topology of the Fundamental Gap in Photonic Crystals
Physical Review X, 2022 The fundamental, or first, band gap is of unmatched importance in the study of photonic crystals. Here, we address precisely where this gap can be opened in the band structure of three-dimensional photonic crystals.
Thomas Christensen +3 more
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Photonic-Band-Gap Resonator Gyrotron [PDF]
Physical Review Letters, 2001 We report the design and experimental demonstration of a gyrotron oscillator using a photonic-band-gap (PBG) structure to eliminate mode competition in a highly overmoded resonator. The PBG cavity supports a TE(041)-like mode at 140 GHz and is designed to have no competing modes over a minimum frequency range delta omega/omega of 30% about the design ...
J R, Sirigiri +5 more
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International Journal of Electronics and Communications System, 2023 In this present paper, we consider some features of the states of one-dimensional photonic crystals. Form the numerical results performed by transfer matrix method in periodic multilayer structure made of titanium dioxide and tellurium material, it is ...
Shalaw Saman Khalid +4 more
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Photonic Band-Gap Inhibition of Modulational Instabilities [PDF]
Physical Review Letters, 2004 Spatial structures as a result of a modulational instability are studied in a nonlinear cavity with a photonic crystal. The interaction of the modulated refractive index with the nonlinearity inhibits the instability via the creation of a photonic band gap. A novel mechanism of light localization due to defects and pattern inhibition is also described.
Gomila, Damià +2 more
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Highly dispersive photonic band-gap-edge optofluidic biosensors [PDF]
Journal of the European Optical Society-Rapid Publications, 2006 Highly dispersive photonic band-gap-edge optofluidic biosensors are studied theoretically. We demonstrate that these structures are strongly sensitive to the refractive index of the liquid, which is used to tune dispersion of the photonic crystal.
Xiao Sanshui, Mortensen Niels Asger
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Photonic Bloch Waves and Photonic Band Gaps [PDF]
, 1995 Photonic band gap materials are dielectrics with a synthetic, three dimensional, multiply periodic microstructure (lattice constant of order the optical wavelength) whose distinguishing feature is a very large modulation depth of refractive index. When appropriately designed, these "photonic crystals" exhibit ranges of optical frequency where light ...
Russell, Philip St.J. +2 more
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