Results 21 to 30 of about 64,657 (295)
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 +11 more
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Physics World, 1992 Many major discoveries in physics this century originate from the study of waves in periodic structures. Examples include X-ray and electron diffraction by crystals, electronic band structure and holography. Analogies between disciplines have also led to fruitful new avenues of research.
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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 +3 more
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Metamaterial Control of Hybrid Multifunctional High-Tc Superconducting Photonic Crystals for 1D Quasi-periodic Structure Potential Applications [PDF]
Materials ResearchIn 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
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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 +5 more
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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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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 +2 more
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Ultrafast optical switching of three-dimensional Si inverse opal photonic band gap crystals [PDF]
, 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
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Photonic band-gap structures [PDF]
Journal of the Optical Society of America B, 1993 The analogy between electromagnetic wave propagation in multidimensionally periodic structures and electron-wave propagation in real crystals has proven to be a fruitful one. Initial efforts were motivated by the prospect of a photonic band gap. a frequency band in three-dimensional dielectric structures in which electromagnetic waves are forbidden ...
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The diversity of three-dimensional photonic crystals
Nature Communications, 2021 Photonic crystals have a range of desirable properties for manipulating light. Here, the authors calculate and use the photonic band gap for thousands of such crystals to examine heuristics for their design and predict new photonic crystal structures.
Rose K. Cersonsky +3 more
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