Results 11 to 20 of about 2,794,441 (253)

Bandwidth enhancement for small patch antenna using PBG structure for different wireless applications [PDF]

, 2009
A design strategy using Photonic Band Gap (PBG) structure on ground plane to achieve wider bandwidth for patch antenna is presented. It is found that, the impedance bandwidth has improved from 3.72% to 31.9% at centre frequency 9 GHz after adding PBG on ...
AbuTarboush, HF, Nilavalan, R, Al-Raweshidy, H   +2 more
core   +6 more sources

Simultaneous Existence of Phononic and Photonic Band Gaps in Phoxonic Crystal Slabs [PDF]

, 2010
We discuss the simultaneous existence of phononic and photonic band gaps in a periodic array of holes drilled in a Si membrane. We investigate in detail both the centered square lattice and the boron nitride (BN) lattice with two atoms per unit cell ...
Papanikolaou, N., V. Laude, B. Djafari Rouhani, Vasseur, Jerome O., El Hassouani, Y., ElBoudouti, EH, Li, C., DjafariRouhani, Bahram, Y. El Hassouani, Papanikolaou, Nikos, C. Li, N. Papanikolaou, Pennec, Y., El Boudouti, E.H., Pennec, Yan, ElHassouani, Y., Martinez, Alejandro, A. Martinez, Laude, Vincent, Djafari-Rouhani, Bahram, Benchabane, Sarah, Vasseur, J., Rouhani, B. Djafari, Y. Pennec, Li, Chanseng, El Boudouti. E. H., J. O. Vasseur, Benchabane, Samir, E. H. El Boudouti, Vasseur, J. O., S. Benchabane   +30 more
core   +1 more source

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

Results 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, Weici Liu, Xiangbo Yang, Zhongchao Wei, Shiping Du, Hongyun Meng, Hongzhan Liu, Jianping Guo, Liujing Xiang, Zhenming Huang, Haoxian Li, Faqiang Wang   +11 more
doaj   +1 more source

Tunability and enlargement of omnidirectional transmission frequency range in a photonic heterostructure containing Dirac semimetal

AIP Advances, 2018
In this study, We theoretically realized the enlargement of the photonic crystal band gap by a photonic heterostructure containing Dirac semimetal layer. At the same time, since the dielectric constant of the Dirac semimetal changes with its Fermi level,
Yunkun Zhao, Yuping Zhang, Maoyong Cao, Huiyun Zhang   +3 more
doaj   +1 more source

Metamaterial Control of Hybrid Multifunctional High-Tc Superconducting Photonic Crystals for 1D Quasi-periodic Structure Potential Applications [PDF]

Materials Research
In the present work, electromagnetic wave properties of the Fibonacci one-dimention photonic crystal (1DPC) structure consisting of double negative materials incorporated high Tc superconductor are theoretically investigated.
Arafa H Aly, Doaa Mohamed, M A Mohaseb
doaj   +2 more sources

Superprism phenomena in planar photonic crystals [PDF]

, 2002
We utilize the anomalous dispersion of planar photonic crystals near the dielectric band edge to control the wavelength-dependent propagation of light. We typically observe an angular swing of up to 10degrees as the input wavelength is changed from 1290 ...
Wu, L, Krauss, Thomas Fraser, Karle, T, Mazilu, M   +3 more
core   +1 more source

Emergence and control of photonic band structure in stacked OLED microcavities

Nature Communications, 2021
Understanding and manipulating the photonic band structure formed in stacked Fabry-Pérot microcavity organic light-emitting diodes (OLEDs) is key to optimizing their performance. Here, through intelligent device design, the authors tune the photonic band
David Allemeier, Benjamin Isenhart, Ekraj Dahal, Yuki Tsuda, Tsukasa Yoshida, Matthew S. White   +5 more
doaj   +1 more source

Photonic band gap fiber accelerator

Physical Review Special Topics. Accelerators and Beams, 2001
There are three requirements in making a traveling wave accelerator: longitudinal electric field, synchronization, and confinement. We present and analyze a conceptually new kind of charged particle accelerator, making use of a photonic band gap lattice ...
Xintian Eddie Lin
doaj   +1 more source

Design and characterisation of photonic quasicrystals from microwave to optical regime [PDF]

, 2010
Photonic band-gap materials are artificially periodic engineered materials with which we can control and manipulate the electromagnetic radiation. The period photonic crystals are well known and have been studied for the last two decades.
Thankamani, Priya Rose
core   +1 more source

Investigating the Properties of an Optical Waveguide Based on Photonic Crystal with Point Defect and Lattice Constant Perturbation [PDF]

Journal of Optoelectronical Nanostructures, 2016
In this paper, a photonic crystal waveguide with point defects and lattice constant perturbations of +5%, -5% are being investigated. Firstly waveguide structures with constant and specific parameters are being studied and photonic band gap diagrams for ...
Khojasteh Zarei, Ghahraman Solookinejad, Masoud Jabbari   +2 more
doaj