Results 61 to 70 of about 63,853 (195)

T-typed photonic crystal circulator with square lattice Al2O3 rods array and NiZn-ferrite posts

open access: yesMaterials & Design, 2019
This paper proposes and validates a novel T-typed magneto-photonic crystals circulator consisting of Al2O3 ceramic rods array and ferrite posts. Based on the numerical simulations on the band gap of photonic crystals and the function of the circulator ...
Yong Wang   +5 more
doaj   +1 more source

Hybrid topological photonic crystals

open access: yesNature Communications, 2023
Topologically protected photonic edge states offer unprecedented robust propagation of photons that are promising for waveguiding, lasing, and quantum information processing.
Yanan Wang   +11 more
doaj   +1 more source

Microwave Applications of Photonic Band Gap Structures [PDF]

open access: yes30th European Microwave Conference, 2000, 2000
We have investigated two major applications of photonic band gap materials. We demonstrated the guiding and bending of electromagnetic waves through planar waveguides built around layer-by-layer photonic crystals. We then investigated the radiation properties of an antenna that was formed by a hybrid combination of a monopole radiation source and a ...
Temelkuran, Burak   +6 more
openaire   +2 more sources

Ultrafast optical switching of three-dimensional Si inverse opal photonic band gap crystals [PDF]

open access: yes, 2007
We present ultrafast optical switching experiments on 3D photonic band gap crystals. Switching the Si inverse opal is achieved by optically exciting free carriers by a two-photon process. We probe reflectivity in the frequency range of second order Bragg
Albert Polman   +8 more
core   +3 more sources

Simulation of simultaneous photonic and phononic band gaps in Sapphire

open access: yesMATEC Web of Conferences, 2016
The simultaneous existence of photonic and phononic band gaps in a simple square periodic array of holes drilled in sapphire substrate is investigated theoretically.
Bentarki H., Tlidi M., Makhoute A.
doaj   +1 more source

Spectral transformations in the regime of pulse self-trapping in a nonlinear photonic crystal

open access: yes, 2011
We consider interaction of a femtosecond light pulse with a one-dimensional photonic crystal with relaxing cubic nonlinearity in the regime of self-trapping.
Novitsky, Denis
core   +1 more source

Direct experimental visualization of waves and band structure in 2D photonic crystal slabs

open access: yesNew Journal of Physics, 2014
We demonstrate for the first time the ability to perform time resolved imaging of terahertz (THz) waves propagating within a photonic crystal (PhC) slab.
Benjamin K Ofori-Okai   +4 more
doaj   +1 more source

Photonic band structure in a one-dimensional distributed Bragg reflector pillar

open access: yesMaterials Research Express, 2020
This paper aims to calculate the photonic band structure in a distributed Bragg reflector pillar. The one-dimensional periodic photonic pillar consists of alternating layers of GaAs and air.
Francis Segovia-Chaves   +2 more
doaj   +1 more source

Fast widely tunable chiral nematic liquid crystal filter [PDF]

open access: yes, 2014
Chiral nematic liquid crystals (CLCs) can spontaneously arrange into helical structures with periodicities of a few hundred nanometers with a certain pitch (P) and corresponding periodic refractive index profile.
Beeckman, Jeroen   +2 more
core  

Qualitative aspects of the entanglement in the three-level model with photonic crystals

open access: yes, 2005
This communication is an enquiry into the circumstances under which concurrence and phase entropy methods can give an answer to the question of quantum entanglement in the composite state when the photonic band gap is exhibited by the presence of ...
A. Kamli   +17 more
core   +1 more source

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