نتایج جستجو برای: dual polarization carrier

تعداد نتایج: 290482  

Journal: :Physical review applied 2021

Second-order photonic topological insulators that host highly localized corner states resilient to defects, are opening new routes towards developing fascinating devices. However, the existing works on second-order have mainly focused either transverse magnetic or electric modes. In this paper, we propose a dual-polarization crystal structure for both and modes through topology optimization. Si...

2014
M. H. Sheen M. C. Lee

Strained InGaN layers grown on a c-plane sapphire is known to have strong spontaneous and piezoelectric polarization field, where the discontinuity of polarization at heterojunction is to induce bounded surface charges [1]. This polarization-related phenomenon can affect the internal electric field of active region and induce the quantum-confined stark effect (QCSE) at quantum well. QCSE result...

2017
N. Peyghambarian S. W. Koch

2014 Bulk CdSe and microcrystallites of CdSexS1-x embedded in a glass matrix are studied using femtosecond laser techniques. The ultrafast dynamics of the photogenerated carriers are measured. Spectral hole burning due to creation of a non-thermal carrier population is observed in both types of materials. The carrier recombination lifetime is measured. Coherent interaction between the probe pul...

2009
Spilios Riyopoulos

The effect of electrostatic shielding of the polarization fields in nanostructures at high carrier densities is studied. A simplified analytical model, employing screened, exponentially decaying polarization potentials, localized at the edges of a QW, is introduced for the ES-shielded quantum confined Stark effect (QCSE). Wave function trapping within the Debye-length edge-potential causes blue...

Journal: :International Journal of Antennas and Propagation 2018

Journal: :IEEE Access 2021

A novel Dual-polarization SAR ship target recognition method based on feature and loss fusion deep network is proposed in this paper, to improve the generalization ability, accuracy of imbalance samples, real-time performance general learning network. The combined composed two parts. first part region extraction lightweight mini Hourglass network, eliminate impact data background noise identifi...

2010
Jeremy B. Nicoll Franz J. Meyer AK

L-Band SAR, like that on the JAXA’s ALOS PALSAR instrument, is much more susceptible to ionospheric effects than other space based SAR missions, mainly operating in C-band or X-Band. While single-band attenuation of instruments such as the single-polarization JERS-1 SAR instrument certainly occurred, it was rarely noted. With the advent of fulland dual-polarization (full-pol and dual-pol) instr...

2007
Andrew Huston Yan Zhang Guifu Zhang Mark Yeary

ODUCTION ar sensors with dual-polarization capability etter understanding and characterization of hazards. Advanced knowledge-based hazard algorithms would require better knowledge of ttering characteristics of hydrometeors such as , hailstones, and snowflakes. Especially, characteristics becomes important for utilize phase-array dual-polarization radar Traditionally, theoretical approaches [1]...

2008
Chung Shen Jyh Ching Juang

In this paper, the application and development of a highly integrated GPS receiver that employs reflected GPS signals for ground object detection and flood flow is described. Both righthand circular polarization (RHCP) and left-hand circular polarization (LHCP) antennas are employed so that the direct and reflected signals can be simultaneously obtained. The objective of this study is to use th...

2016
Lei Dong Alexandra Helmke Ari Waisman Hermann Haller Andreas Pich Sibylle von Vietinghoff

Understanding of T helper 17 lineage (TH17) polarization has been significantly promoted by cell culture experiments that reduce the complexity of the in vivo environment. We here investigated TH17 amplification by coating of cytokine preparations. Cytokine preparations coated to the surface compared to the same amount given in solution significantly enhanced TH17 polarization assessed by flow ...

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