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Nonlinear optical performance of few-layer molybdenum diselenide as a slow-saturable absorber

Photonics Research 2018年第7期6卷 674-680页

作者： GAOZHONG WANG GUANGXING Lia.G AIDAN A.BAKER-MURRAY KANGPENG WANG JING JING WANG Xia.YAN ZHANG DANIEL BENNETT JING-TING LUO JUN WANG PING FAN werner J.BLAU Shenzhen Key Laboratory of Advanced Thin Films and Applications College of Physics and Energy Shenzhen University School of Physics and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) Trinity College Dublin Key Laboratory of Materia.s for High-Power Laser Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

Two-dimensional transition metal dichalcogenides are considered promising materia.s for next-generation photonics and nano-optical devices. Although many previous reports have shown saturable absorption of molybdenum diselenide(Mo Se2), these nonlinear optical(NLO) properties of Mo Se2 were measured in separate works and under different conditions with their hot-carrier relaxations. Here, we conducted a series of coherent studies on the NLO properties of few-layer Mo Se2 via.open-aperture Z-scan and degenerate pump-probe techniques. These measurements were taken to test the materia.s' capabilities as a slow-saturable absorber. A slowabsorber model was employed to analyze the NLO measurements, and the results show that the NLO modulation depth was modeled to be 7.4% and 15.1% for the linear absorption coefficients of 5.22 cm-1 and 6.51 cm-1,respectively. The corresponding saturated intensities were modeled to be 39.37 MW∕cm2 and 234.75 MW∕cm2,respectively. The excitation carrier recovery time of few-layer Mo Se2 was measured by degenerate pump-probe techniques to be ～220 ps. These nonlinear optical performances make it a promising slow-saturable absorber for passive mode locking in femtosecond lasers.

关键词：金属双卤纳米技术发展现状通讯技术

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Tunable nonlinear refractive index of two-dimensional MoS2, WS2, and MoSe2 nanosheet dispersions [Invited]

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Photonics Research 2015年第2期3卷 51-55页

作者： Gaozhong Wang Saifeng Zhang Xia.yan Zhang Long Zhang Ya Cheng Daniel Fox Hongzhou Zhang Jonathan N.Coleman werner J.Blau Jun Wang Key Laboratory of Materia.s for High-Power Laser Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences School of Physics and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) Trinity College Dublin State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences

Liquid-phase-exfolia.ion technology was utilized to prepare layered MoS2, WS2, and MoSe2 nanosheets in cyclohexylpyrrolidone. The nonlinear optical response of these nanosheets in dispersions was investigated by observing spatia. self-phase modulation（SSPM） using a 488 nm continuous wave laser beam. The diffraction ring patterns of SSPM were found to be distorted along the vertical direction right after the laser traversing the nanosheet dispersions. The nonlinear refractive index of the three transition metal dichalcogenides dispersions n2 was measured to be 10-7cm2W-1, and the third-order nonlinear susceptibility χ（3）10-9 esu. The relative change of effective nonlinear refractive index Δn2e∕n（2e） of the MoS2, WS2, and MoSe2 dispersions can be modulated 0.012–0.240, 0.029–0.154, and 0.091–0.304, respectively, by changing the incident intensities. Our experimental results imply novel potentia. application of two-dimensional transition metal dichalcogenides in nonlinear phase modulation devices.

关键词： Mo show exp Tunable nonlinear refractive index of two-dimensional MoS2 WS2

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硒来源及硒浓度对肉仔鸡生长性能及硒存留的影响

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饲料与畜牧（新饲料） 2007年第7期 49-49页

作者：高俊 I.Yoon T.M.werner J.M.Butler

用360只一日龄的JumboCornish杂交肉仔鸡进行为期6周的试验，以评估不同的硒来源及硒添加量对肉鸡生长性能和硒存留率的影响。肉仔鸡饲以玉米一豆粕型日粮，其中添加0（负对照）、来源于SelenosourceAF（硒酵母A，Dia.ondVm-山s，CedarR... 详细信息

用360只一日龄的JumboCornish杂交肉仔鸡进行为期6周的试验，以评估不同的硒来源及硒添加量对肉鸡生长性能和硒存留率的影响。肉仔鸡饲以玉米一豆粕型日粮，其中添加0（负对照）、来源于SelenosourceAF（硒酵母A，Dia.ondVm-山s，CedarRapids，ia.的0．1、0．2、0．3ppm硒、来源于Sel—Plex（酵母硒B，Alltech，Nicholasville，KY）的0．3ppm硒、来源于亚硒酸钠的0．3ppm硒。

关键词：生长性能硒浓度肉仔鸡硒存留率亚硒酸钠一日龄添加量硒酵母

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Pedigree analysis of 220 almond genotypes reveals two world mainstream breeding lines based on only three different cultivars

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Horticulture Research 2021年第1期8卷 72-82页

作者： Felipe Perez de los Cobos Pedro J.Martinez-Garcia.Agusti Romero Xavier Mia.nau Iban Eduardo werner Howad Mourad Mnejja Federico Dicenta Rafel Socia. i Company Maria.J.Rubio-Cabetas Thomas M.Gradziel Michelle Wirthensohn Henri Duval Doron Holland Pere Arus Francisco J.Vargas Ignasi Batlle Institut de Recerca i Tecnologia.Agroalimentaries(IRTA) Mas BoveCtra.Reus-El Morell Km 3843120 ConstantiTarragonaSpain Institut de Recerca i Tecnologia.Agroalimentaries(IRTA) Centre de Recerca en Agrigenomica(CRAG)CSIC-IRTA-UAB-UB.Cerdanyola del Valles(Bellaterra)08193 BarcelonaSpain Centro de Edafologia.y Biologia.Aplicada del Segura Consejo Superior de Investigaciones Cientificas(CEBAS-CSIC)P.O.Box 16430100 EspinardoMurciaSpain Institut de Recerca i Tecnologia.Agroalimentaries(IRTA) FruitcentrePCiTALGardeny ParkFruitcentre Building25003 LleidaSpain Centro de Investigacion y Tecnologia.Agroalimentaria.de Aragon(CITA) Avda.Montanana 93050059ZaragozaInstituto Agroalimentario de Aragon IA2(CITA-Universidad de Zaragoza)ZaragozaSpain University of California 1 Shields AvenueDavisCA 95616USA University of Adelaide Waite ResearchSchool of AgricultureFood and WinePMB 1Glen OsmondAdelaideSA 5064Australia Institut National de la Recherche Agronomique(INRA) Domain St.Maurice CS 6009484143 Montfavet CedexFrance Agricultural Research Organization Newe-Ya’ar Research CenterP.O.Box 1021Ramat Yishad 30095Israel

Loss of genetic varia.ility is an increasing challenge in tree breeding programs due to the repeated use of a reduced number of founder genotypes.However,in almond,little is known about the genetic varia.ility in current breeding stocks,although several cases of inbreeding depression have been reported.To gain insights into the genetic structure in modern breeding programs worldwide,marker-verified pedigree data of 220 almond cultivars and breeding selections were analyzed.Inbreeding coefficients,pairwise relatedness,and genetic contribution were calculated for these genotypes.The results reveal two mainstream breeding lines based on three cultivars:“Tuono”,“Cristomorto”,and“Nonpareil”.Descendants from“Tuono”or“Cristomorto”number 76(sharing 34 descendants),while“Nonpareil”has 71 descendants.The mean inbreeding coefficient of the analyzed genotypes was 0.041,with 14 genotypes presenting a high inbreeding coefficient,over 0.250.Breeding programs from France,the USA,and Spain showed inbreeding coefficients of 0.075,0.070,and 0.037,respectively.According to their genetic contribution,modern cultivars from Israel,France,the USA,Spain,and Australia.trace back to a maximum of six main founding genotypes.Among the group of 65 genotypes carrying the S f allele for self-compatibility,the mean relatedness coefficient was 0.125,with“Tuono”as the main founding genotype(24.7%of total genetic contribution).The results broaden our understanding about the tendencies followed in almond breeding over the last 50 years and will have a large impact into breeding decision-making process worldwide.Increasing current genetic varia.ility is required in almond breeding programs to assure genetic gain and continuing breeding progress.

关键词： breeding cultivar founding

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添加不同剂量和来源的硒对肉鸡生产性能和硒存留率的影响

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饲料与畜牧（新饲料） 2007年第4期 50-50页

作者： I. Yoon T. M. werner J. M. Butler 高俊(译)

用360只1日龄的肉仔鸡进行6周的试验，以评估不同的硒源和添加量对肉鸡生产性能和硒存留率的影响。在玉米豆粕型的试验日粮中添加0（负对照）、0．1、0．2、0．3ppm的酵母硒A（SelenoSource AF，Dia.ond V Mills，Cedar Rapids，ia.，0... 详细信息

用360只1日龄的肉仔鸡进行6周的试验，以评估不同的硒源和添加量对肉鸡生产性能和硒存留率的影响。在玉米豆粕型的试验日粮中添加0（负对照）、0．1、0．2、0．3ppm的酵母硒A（SelenoSource AF，Dia.ond V Mills，Cedar Rapids，ia.，0．3ppm的酵母硒B（Sel—Plex，Alltech，Nicholasville，KY）和0．3ppm的无机硒（来自亚硒酸钠）。用肉鸡育雏日粮饲喂至21d（每个处理6个重复，每个重复10只）。21日龄时，肉仔鸡在日粮处理内被重新分组至育肥笼中（每个处理11个重复，每个重复5只）。

关键词：肉鸡生产性能硒存留率剂量试验日粮玉米豆粕型亚硒酸钠日粮饲喂日粮处理

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