Periodic number for Anosov maps

1997 ◽  
Vol 13 (2) ◽  
pp. 169-174 ◽  
Author(s):  
Sun Wenxiang
Keyword(s):  
Periodic Number

scholarly journals Reflection Enhancement and Giant Lateral Shift in Defective Photonic Crystals with Graphene

2019 ◽  
Vol 9 (10) ◽  
pp. 2141 ◽  
Author(s):  
Dong Zhao ◽  
Fangmei Liu ◽  
Peng Meng ◽  
Jie Wen ◽  
Siliu Xu ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Interband Transition ◽  
Single Layer ◽  
Defect Layer ◽  
Lateral Shift ◽  
Single Layer Graphene ◽  
Intraband Transition ◽  
Highly Sensitive ◽  
Highly Sensitive Sensors ◽  
Periodic Number

This study investigates the reflectance of the defective mode (DM) and the lateral shift of reflected beam in defective photonic crystals incorporated with single-layer graphene by the transfer matrix method (TMM). Graphene, treated as an equivalent dielectric with a thickness of 0.34 nm, was embedded in the center of a defect layer. The reflectance of the DM was greatly enhanced as the intraband transition of electrons was converted to an interband transition in graphene. The reflectance of the DM could be further enhanced by increasing the Bragg periodic number. Furthermore, a large lateral shift of the reflected beam could also be induced around the DM. This study may find great applications in highly sensitive sensors.

Efficacy of Imicyafos SL against Cyst Nematode, Heterodera spp., Depending on Time and Periodic Number of Applications in Chinese Cabbage

2017 ◽  
Vol 21 (4) ◽  
pp. 503-509 ◽  
Author(s):  
Jeongeun Kim ◽  
Mun Gi Jeong ◽  
Yeongjun Kim ◽  
Md. Faisal Kabir ◽  
Mwamula Abraham Okki ◽  
...  
Keyword(s):  
Chinese Cabbage ◽  
Cyst Nematode ◽  
Periodic Number

scholarly journals Effect of periodic number of [Si/Sb80Te20]x multilayer film on its laser-induced crystallization studied by coherent phonon spectroscopy

2012 ◽  
Vol 7 (1) ◽  
pp. 638 ◽  
Author(s):  
Weiling Zhu ◽  
Changzhou Wang ◽  
Mingcheng Sun ◽  
Simian Li ◽  
Jiwei Zhai ◽  
...  
Keyword(s):  
Multilayer Film ◽  
Coherent Phonon ◽  
Periodic Number ◽  
Induced Crystallization

The absorbing properties of one-dimensional plasma photonic crystals

2016 ◽  
Vol 82 (1) ◽  
Author(s):  
Limei Qi
Keyword(s):  
Photonic Crystals ◽  
Electromagnetic Waves ◽  
Plasma Frequency ◽  
Incident Angle ◽  
Plasma Parameters ◽  
One Dimensional ◽  
Frequency Plasma ◽  
Potential Applications ◽  
Plasma Photonic Crystals ◽  
Periodic Number

Using the transfer matrix method, absorbing properties of electromagnetic waves in one-dimensional plasma photonic crystals are proposed. Compared with the absorption of bulk plasma, more absorbing bands have been found in one-dimensional plasma photonic crystals, and the first absorbing band appears below the plasma frequency. These absorbing bands can be controlled by varying structure parameters, plasma parameters and the incident angle. Results show that the periodic number and collision frequency only control the absorbing magnitude. Plasma frequency, plasma thickness and incident angle affect both the absorbing magnitude and locations. Increasing the dielectric constant of the dielectric makes more absorbing bands appear. These features of one-dimensional plasma photonic crystals would have potential applications in tunable millimetre absorbers.

scholarly journals Data-driven generalized atomic environment prediction for binary and multinary inorganic compounds using the periodic number

2008 ◽  
Vol 1 (2) ◽  
pp. 210-226 ◽  
Author(s):  
Pierre VILLARS ◽  
◽  
Jo DAAMS ◽  
Yoshihiro SHIKATA ◽  
Ying CHEN ◽  
...  
Keyword(s):  
Inorganic Compounds ◽  
Data Driven ◽  
Periodic Number

Forbidden Band Broadening of Photonic Crystal for Wide Waveband Infrared Stealth

2012 ◽  
Vol 571 ◽  
pp. 170-174 ◽  
Author(s):  
Jian Gang Zhao ◽  
Xuan Ke Zhao ◽  
Lian Fen Wang ◽  
Xiang Zuo
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Optical Thickness ◽  
Band Broadening ◽  
Center Wavelength ◽  
Calculation Results ◽  
Numeric Calculation ◽  
Index Ratio ◽  
Periodic Number

In order to achieve 1~14μm infrared stealth, the forbidden band of photonic crystal (PC) must be broaden. In this paper, we systematically studied several parameters affect the forbidden bandwidth of PC, such as refractive index ratio, thickness and periodic number of two medium layers. Numeric calculation results show that the forbidden bandwidth increases with the refractive index ratio of two medium layers, and it no longer increases when the refractive index ratio is greater than six; the forbidden bandwidth comes largest when the optical thickness of two medium layers is equal to one quarter of center wavelength respectively; and the periodic number has little influence on the bandwidth. Based on these, we chose PbTe and MgF2 to design a compound PC by four photonic crystals whose center wavelengths are at 10.6μm, 4.8μm, 2.5μm and 1.06μm respectively, and obtained nearly 100% reflectance in 1~18μm waveband, which would well meet the demand of the all-infrared waveband stealth.

scholarly journals Simplified Modal-Cancellation Approach for Substrate-Integrated-Waveguide Narrow-Band Filter Design

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 962 ◽  
Author(s):  
Sebastian Celis ◽  
Mohamed Farhat ◽  
Abdullah S. Almansouri ◽  
Hakan Bagci ◽  
Khaled N. Salama
Keyword(s):  
Filter Design ◽  
Narrow Band ◽  
Substrate Integrated Waveguide ◽  
New Approach ◽  
Frequency Bands ◽  
Order Filter ◽  
Filter Structure ◽  
Band Filter ◽  
Narrow Band Filter ◽  
Periodic Number

Current substrate-integrated-waveguide (SIW) filter design methodologies can be extremely computational and time-inefficient when a narrow-band filter is required. A new approach to designing compact, highly selective narrow-band filters based on smartly positioned obstacles is thus presented here. The proposed modal-cancellation approach is achieved by translating or eliminating undesired modes within the frequency of interest. This is performed by introducing smartly located obstacles in the maxima and nulls of the modes of interest. This approach is different from the traditional inverter technique, where a periodic number of inductive irises are coupled in a ladder configuration to implement the desired response of an nth-order filter, and significantly reduces the complexity of the resulting filter structure. Indeed, the proposed method may be used to design different filters for several frequency bands and various applications. The methodology was experimentally verified through fabricated prototypes.

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