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Dual-band independent phase control based on high efficiency metasurface[Invited]

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Chinese Optics Letters 2021年第10期19卷 7-14页

作者： Jinxing Li Yueyi Yuan Qun Wu shah nawaz Burokur Kuang Zhang Department of Microwave Engineering Harbin Institute of TechnologyHarbin 150001China LEME UPLUniversite Paris NanterreF92410 Ville d'AvrayFrance

A general method to realize arbitrary dual-band independent phase control is proposed and demonstrated in this paper.A double-layered C-shape reflective meta-atom is designed to realize independent phase control with high *** a proof of concept,we propose two functional metasurfaces in the microwave region;the first metasurface performs beam steering in different directions,and the second metasurface generates achromatic beam steering at two distinct *** simulation and measurement results agree well with the theoretical *** maximum measured efficiency is 88.7%and 92.3%at 6.8 GHz and 8.0 GHz,respectively,for one metasurface,and 91.0%and 89.8%at 6.9 GHz and8.6 GHz,respectively,for the other.

关键词： dual-band independent phase control microwave metasurface high efficiency reflection geometric phase

Bi-layered coded metasurface for multi-functional hologram with broadband transmission and efficient reflection

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Chinese Optics Letters 2024年第5期22卷 8-16页

作者：朱磊李绪胜董亮谢文静尚关玉 shah nawaz Burokur 丁旭旻 School of Computer and Control Engineering Qiqihar UniversityQiqihar 161006China Communication and Electronics Engineering Institute Qiqihar UniversityQiqihar 161006China Heilongjiang Key Laboratory of Big Data Network Security Detection and Analysis Qiqihar UniversityQiqihar 161000China Department of Microwave Engineering Harbin Institute of TechnologyHarbin 150001China LEME UPLUniversitéParis NanterreF92410 Ville d’AvrayFrance Advanced Microscopy and Instrumentation Research Center Harbin Institute of TechnologyHarbin 150080China Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China

A multi-functional full-space metasurface based on frequency and polarization multiplexing is *** metasurface unit consists of metallic patterns printed on the two faces of a single-layered dielectric *** unit cell can control electromagnetic wavefronts to achieve a broadband transmission with amplitudes greater than 0.4 from 4.4 to 10.4 ***,at 11.7 GHz and 15.4 GHz,four high-efficiency reflection channels with a reflection amplitude greater than 0.8 are also *** illuminated by linearly polarized waves,five different functions can be realized at five different frequencies,which are demonstrated by theoretical calculations,full-wave simulations,and experimental measurements.

关键词： multi-functional metasurface broadband transmission efficient reflection full space

Complementary transmissive ultra-thin meta-deflectors for broadband polarization-independent refractions in the microwave region

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Photonics Research 2019年第1期7卷 80-88页

作者： YUEYI YUAN KUANG ZHANG XUMIN DING BADREDDINE RATNI shah nawaz BUROKUR QUN WU Department of Microwave Engineering Harbin Institute of Technology State Key Laboratory of Millimeter Waves LEME UPL Université Paris Nanterre

Polarization manipulation is a significant issue for artificial modulation of the electromagnetic(EM) wave, but general mechanisms all suffer the restriction of inherent symmetric properties between opposite ***, a strategy to independently and arbitrarily manipulate the EM wave with orthogonal circular polarizations based on a metasurface is proposed, which effectually breaks through traditional symmetrical characteristics between orthogonal handedness. By synthesizing the propagation phase and geometric phase, the appropriate Jones matrix is calculated to obtain independent wavefront manipulation of EM waves with opposite circular polarizations. Two transmissive ultra-thin meta-deflectors are proposed to demonstrate the asymmetrical refraction of transmitted circularly polarized waves in the microwave region. Simulated transmitted phase front and measured far-field intensity distributions are in excellent agreement, indicating that the transmitted wave with different polarizations can be refracted into arbitrary and independent directions within a wide frequency band(relative bandwidth of 25%). The results presented in this paper provide more freedom for the manipulation of EM waves, and motivate the realizations of various polarization-independent properties for all frequency spectra.

关键词： Polarization manipulation general mechanisms effectually breaks

Versatile metasurface platform for electromagnetic wave tailoring

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Photonics Research 2021年第9期9卷 1650-1659页

作者： RUI FENG BADREDDINE RATNI JIANJIA YI HAILIN ZHANG ANDRÉDE LUSTRAC shah nawaz BUROKUR Key Laboratory of Integrated Services Networks Xidian UniversityXi’an 710071China UniversitéParis-Saclay CNRSCentre de Nanosciences et de Nanotechnologies91120 PalaiseauFrance LEME UPLUniv Paris NanterreF92410 Ville d’AvrayFrance School of Information and Communications Engineering Xi’an Jiaotong UniversityXi’an 710049China UPL Univ Paris NanterreF92410 Ville d’AvrayFrance

The emergence of metasurfaces provides a novel strategy to tailor the electromagnetic response of electromagnetic waves in a controlled manner by judicious design of the constitutive ***,passive metasurfaces tend to perform a specific or limited number of functionalities and suffer from narrow-frequency-band *** reconfigurable metasurfaces can generally be controlled only in a 1D configuration or use p-i-n diodes to show binary phase ***,a 2D reconfigurable reflective metasurface with individually addressable meta-atoms enabling a continuous phase control is proposed in the microwave *** response of the meta-atom is flexibly controlled by changing the bias voltage applied to the embedded varactor diode through an elaborated power supply *** assigning appropriate phase profiles to the metasurface through voltage modulation,complex beam generation,including Bessel beams,vortex beams,and Airy beams,is fulfilled to demonstrate the accurate phase-control capability of the reconfigurable *** simulations and measurements are performed as a proof of concept and show good *** proposed design paves the way toward the achievement of real-time and programmable multifunctional meta-devices,with enormous potential for microwave applications such as wireless communication,electromagnetic imaging,and smart antennas.

关键词： surface. microwave proof

Compact logic operator utilizing a single-layer metasurface

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Photonics Research 2022年第2期10卷 316-322页

作者： Zihan Zhao Yue Wang Xumin Ding Haoyu Li Jiahui Fu Kuang Zhang shah nawaz Burokur Qun Wu Advanced Microscopy and Instrumentation Research Center School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Department of Microwave Engineering Harbin Institute of TechnologyHarbin 150001China LEME UPLUniv Paris NanterreF92410 Ville d'AvrayFrance

In this paper, we design and demonstrate a compact logic operator based on a single-layer metasurface at microwave frequency. By mapping the nodes in the trained fully connected neural network(FCNN) to the specific unit cells with phase control function of the metasurface, a logic operator with only one hidden layer is physically realized. When the incident wave illuminates specific operating regions of the metasurface, corresponding unit cells are activated and can scatter the incident wave to two designated zones containing logical information in the output layer. The proposed metasurface logic operator is experimentally verified to achieve three basic logic operations(NOT, OR, and AND) under different input signals. Our design shows great application potential in compact optical systems, low-power consumption information transmission, and ultrafast wave-based full signal processing.

关键词： operator layer utilizing

Deep learning‑enabled compact optical trigonometric operator with metasurface

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PhotoniX 2022年第1期3卷 269-280页

作者： Zihan Zhao Yue Wang Chunsheng Guan Kuang Zhang Qun Wu Haoyu Li Jian Liu shah nawaz Burokur Xumin Ding Advanced Microscopy and Instrumentation Research Center School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Department of Microwave Engineering Harbin Institute of TechnologyHarbin 150001China LEME UPLUniv Paris Nanterre92410 Ville d’AvrayFrance

In this paper, a novel strategy based on a metasurface composed of simple and compactunit cells to achieve ultra-high-speed trigonometric operations under specificinput values is theoretically and experimentally demonstrated. An electromagneticwave (EM)-based optical diffractive neural network with only one hidden layer isphysically built to perform four trigonometric operations (sine, cosine, tangent, andcotangent functions). Under the unique composite input mode strategy, the designedoptical trigonometric operator responds to incident light source modes that representdifferent trigonometric operations and input values (within one period), and generatescorrect and clear calculated results in the output layer. Such a wave-based operationis implemented with specific input values, and the proposed concept work may offerbreakthrough inspiration to achieve integrable optical computing devices and photonicsignal processors with ultra-fast running speeds.

关键词： Optical trigonometric operations Metasurface Diffractive neural network

Genetic Variations and Cultivar Purity within the G. <i>hirsutum</i>Cultivars via RAPD Marker

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American Journal of Plant Sciences 2015年第2期6卷 392-404页

作者： Farah Raheel Muhammad Kauser nawaz shah Muhammad shahid Iqbal Ijaz Rasool Noorka Zareen Sarfraz Government Postgraduate College (w) Multan Pakistan PMAS Arid Agricultural University Rawalpindi Pakistan Ayub Agriculture Research Institute Faisalabad Pakistan Department of Plant Breeding and Genetics University College of Agriculture University of Sargodha Sargodha Pakistan National Institute of Biotechnology and Genetic Engineering Faisalabad Pakistan

To assess genetic variation within a cultivar, four commercial varieties with five individual G. hirsutum genotypes and their bulk were assayed with selected forty 10-mer RAPDs per cultivar via PCR. CIM-473 cultivar showed amplification of 321 bands in total per primer with an average of 8 bands. A range of similarity i.e.;80% - 100% within the cultivar has been observed for minimum and maximum respectively. CIM-448 showed amplification of 300 bands in total per primer with an average of 7.5 bands. Maximum similarity of 95% and minimum similarity of 84% was observed within the cultivar. In CIM-1100 the total numbers of fragments amplified are 304, with the average of 7.6 bands per primer and are 12% - 20% polymorphic. Similarly, in NIAB-78 the total numbers of fragments amplified were 310, with the average of 7.7 bands per primer. The reliability of RAPD technique for finding genetic resemblances is indicated by the mentioned results. Numerous groups within 5 individual genotypes bulk among 4 cultivars of G. hirsutum L. have been through cluster analysis which was by the unweighted pair group method of arithmetic means (UPGMA). Dendrograms have been used for showing cultivar relationship.

关键词： Polymerase Chain Reaction (PCR) G. hirsutum RAPD Variation within the Cultivars

Integrated Effects of Rhizobial Inoculum and Inorganic Fertilizers on Wheat Yield and Yield Components

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American Journal of Plant Sciences 2014年第13期5卷 2066-2073页

作者： Muhammad Adnan Zahir shah Asif Khan Muzamil shah Gohar Ali Khan Azaz Ali Nisar Ali Khan Nouman Saleem shah nawaz Saba Akbar Sonia Samreen Kanwal Zaib Department of Plant Breeding and Genetics The University of Agriculture Peshawar Pakistan Department of Soil and Environmental Sciences The University of Agriculture Peshawar Pakistan

An experiment was conducted in pots under natural condition with two factor factorial completely randomized design (CRD) (CRD) to investigate the integrated effect of rhizobia inoculums and inorganic fertilizers on growth and yield of wheat crop at The University of Agriculture Peshawar, during 2012-2013. The experiment was comprised of four inoculums (no, lentil, peas and chickpeas) and two NPK levels (recommended 120:90:60 kg·ha-1 & 20% less of recommended). It was observed that inoculation of wheat by rhizobia significantly increased tillers per plant by a maximum of 42%, plant height by 13%, grain per spike by 16%, 100 grain weight by 10%, biological and grain yield by 10% over un-inoculated (control) treatment. Among inoculums, peas inoculum was found to be the most efficient for all traits except plant height where chickpea inoculum performed better. Similarly recommended NPK significantly increased tillers per plant by 33%, plant height by 19%, grain per spike by 9%, 100 grain weight by 10%, biological yield by 8% and grain yield by 10% compared with 20% less of recommended NPK. Interactive effect of inoculum x NPK was significant for tillers per plant, grain per spike, grain yield and non-significant for plant height, 100 grain weight and biological yield. However, it was evident from the results that inoculation improved all traits both under recommended and 20% less of recommended NPK. The persistent good performance of peas and lentil rhizobial inoculation in wheat growth exhibited that this could be used as a plant growth promoting rhizobacteria for wheat and other cereal crops in prevailing soil and climatic conditions.

关键词： Yield Components Rhizobial Inoculum Wheat Recommended NPK Inorganic Fertilizer

Potential of AM Fungi in Phytoremediation of Heavy Metals and Effect on Yield of Wheat Crop

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American Journal of Plant Sciences 2014年第11期5卷 1578-1586页

作者： Asif Khan Muhammad Sharif Amjad Ali Syed Noor Muhammad shah Ishaq Ahmad Mian Fazli Wahid Bismillah Jan Muhammad Adnan shah nawaz Nisar Ali College of Resource and Environment Northwest A&F University Yangling China Department of Horticulture Gomal University Dera Ismail Khan Pakistan College of Horticulture Northwest A&F University Yangling China Department of Soil and Environmental Sciences University of Agriculture Peshawar Pakistan

A pot experiment was conducted to determine the potential of AM fungi in phytoremediation of heavy metals and its effect on yield of wheat crop. The experiment was conducted in CR Design with four replications during rabi 2012-13. Data showed no increase in grain and shoot yields by AMF inoculation with Zn, Cu, Fe, Mn at different levels but increased root yield, plant height, spike length and hundred grains weight of wheat as compared with uninoculated crop. Post-harvest soil Zn, Cu, Fe and Mn contents of 2, 4.4, 2.8 and 2.9 mg·kg-1, respectively were maximum in uninoculated plants treated with Zn, Cu, Fe, Mn at triple of recommended level. No increases in plant P, N, Zn, Cu, Fe and Mn uptakes were observed by the inoculation of AMF when compared with uninoculated crop. Maximum plant Zn, Cu, Fe and Mn uptakes of 160.5, 206, 1914.6 and 2653 g·ha-1, respectively were recorded in uninoculated plants applied with Zn, Cu, Fe, Mn at triple of recommended levels. Wheat roots infection intensity by AMF increased with higher AMF soil spores density. Results suggest the potential of phytoremediation of contaminated soil to be improved by the inoculation of crops with AMF.

关键词： AM Fungi Heavy Metals Phytoremediation Nutrients Uptakes and Wheat Yield