Results 11 to 20 of about 63,853 (195)

Metallic photonic band-gap materials [PDF]

open access: yesPhysical 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

Research progress of photonic crystals in photocatalysis

open access: yesCailiao 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

Effect of windmill-like-shaped defect on TM photonic band gaps of two-dimensional square-lattice photonic crystals

open access: yesResults 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

open access: yesPhysical 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

Near Infrared -Visible Photonic Bandgap in One-Dimensional Periodic Photonic Crystal Structure Composed of Tio2/Te Layers

open access: yesInternational 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
doaj   +1 more source

Measurement of spontaneous emission from a two-dimensional photonic band gap defined microcavity at near-infrared wavelengths [PDF]

open access: yes, 1999
An active, photonic band gap-based microcavity emitter in the near infrared is demonstrated. We present direct measurement of the spontaneous emission power and spectrum from a microcavity formed using a two-dimensional photonic band gap structure in a ...
D'Urso, B.   +4 more
core   +1 more source

Finite element method analysis of band gap and transmission of two-dimensional metallic photonic crystals at terahertz frequencies [PDF]

open access: yes, 2013
Photonic band gap and transmission characteristics of 2D metallic photonic crystals at THz frequencies have been investigated using finite element method (FEM).
Degirmenci, Elif, Landais, Pascal
core   +1 more source

Inhibited spontaneous emission of quantum dots observed in a 3D photonic band gap [PDF]

open access: yes, 2011
We present time-resolved emission experiments of semiconductor quantum dots in silicon 3D inverse-woodpile photonic band gap crystals. A systematic study is made of crystals with a range of pore radii to tune the band gap relative to the emission ...
A. Lagendijk   +8 more
core   +10 more sources

Fabrication of 3D photonic band gap crystals for controlling the emission of light [PDF]

open access: yesEPJ Web of Conferences
3D photonic band gap crystals can be used to manipulate light, for example to increase the emission of an emitter. An inverse woodpile photonic band gap crystal has been fabricated in silicon by FIB lithography and reactive ion etching.
Goodwin Melissa J.   +6 more
doaj   +1 more source

Characteristics of optical system generating ultra-wide photonic band gap and its potential practicability

open access: yesResults in Physics, 2023
In this study, we design a one-dimensional periodic ring multi-connected optical waveguide network to solve the problem of obtaining ultra-wide photonic band gaps that are too complex for the photonic band gap width to be tuned.
Yan Zhi   +11 more
doaj   +1 more source

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