Results 1 to 10 of about 2,648,113 (296)
Titania Photonic Crystals with Precise Photonic Band Gap Position via Anodizing with Voltage versus Optical Path Length Modulation [PDF]
Nanomaterials, 2019 Photonic crystals based on titanium oxide are promising for optoelectronic applications, for example as components of solar cells and photodetectors. These materials attract great research attention because of the high refractive index of TiO2.
Georgy A. Ermolaev +3 more
doaj +2 more sources
Foam as a self-assembling amorphous photonic band gap material [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2019 Pavel Yazhgur, Joshua Ricouvier
exaly +2 more sources
Photonic Band Gap Materials [PDF]
Proceedings of European Meeting on Lasers and Electro-Optics CLEOE-96, 1996 It is now some time since Yablonovitch proposed the optical analogue of the electron band gap: periodically structured dielectrics may totally exclude light in certain frequency ranges. At the time this concept of a ‘phtonc insulator’ provoked a furore and not a little disbelieve, but the concept is now an accepted one and the attention of the ...
R. Biswas +4 more
+6 more sources
Results in Physics, 2023 Traditionally, in the application of photonic crystals, defect modes are mostly introduced in the photonic band gap to realize high-performance waveguides, and electromagnetic waves beyond the photonic band gap cannot be controlled in photonic crystals ...
Yonghui Zheng +6 more
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
openaire +3 more sources
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
openaire +2 more sources