石墨片超快激光器闪耀登场！http://www.optochina.net/html/news/10230.html英国剑桥大学及法国CNRS的研究人员已经制造出超快锁模(mode-locked)石墨片(graphene)激光器。由于石墨片为零能隙的半导体，这项研究成果不仅令人意外，而且显示了石墨片在光电器件上大有可为。 石墨片为蜂巢晶格的碳原子平面，其电子能以极高速运动，行为类似无静止质量的相对论性粒子，亦即所谓的狄拉克[阅读全文]
vector soliton
介绍科学研究
博文
(2010-03-29 06:55:12)
石墨片超快激光器闪耀登场！http://www.optochina.net/html/news/10230.html英国剑桥大学及法国CNRS的研究人员已经制造出超快锁模(mode-locked)石墨片(graphene)激光器。由于石墨片为零能隙的半导体，这项研究成果不仅令人意外，而且显示了石墨片在光电器件上大有可为。 石墨片为蜂巢晶格的碳原子平面，其电子能以极高速运动，行为类似无静止质量的相对论性粒子，亦即所谓的狄拉克[阅读全文]
(2010-03-19 02:48:56)
GrapheneandLasersBecomeUltrafastFriends
GrapheneandLasersBecomeUltrafastFriends
Ultrafastlasersourceshavegarneredconsiderableattentionfortheirmanypotentialapplications,rangingfrommeteorologytotelecommunications,medicine,andmaterialsprocessing.Mostoftheselasersemployamode-lockingtechniqueinwhichanonlinearopticalelement,calledasaturableabsorber,turnsthelaser’scontinuouswaveoutputintoatraino...[阅读全文]
GrapheneandLasersBecomeUltrafastFriends
Ultrafastlasersourceshavegarneredconsiderableattentionfortheirmanypotentialapplications,rangingfrommeteorologytotelecommunications,medicine,andmaterialsprocessing.Mostoftheselasersemployamode-lockingtechniqueinwhichanonlinearopticalelement,calledasaturableabsorber,turnsthelaser’scontinuouswaveoutputintoatraino...[阅读全文]
(2010-03-19 02:48:25)
Graphene-basedlong-waveinfraredTMsurfaceplasmonmodulator
Graphene-basedlong-waveinfraredTMsurfaceplasmonmodulator
Wedescribetheoreticallyanewlong-waveinfraredopticalmodulatorbasedonthecharacteristicsofTMsurfaceplasmonsingraphene.Calculationsmadeusingafinite-τrandomphaseapproximationmodel,ofrelevantsurface
plasmonpropagationparameters,arepresented.Weshowthattheplasmonlossesvaryasafunct...[阅读全文]
Graphene-basedlong-waveinfraredTMsurfaceplasmonmodulator
Wedescribetheoreticallyanewlong-waveinfraredopticalmodulatorbasedonthecharacteristicsofTMsurfaceplasmonsingraphene.Calculationsmadeusingafinite-τrandomphaseapproximationmodel,ofrelevantsurface
plasmonpropagationparameters,arepresented.Weshowthattheplasmonlossesvaryasafunct...[阅读全文]
(2010-03-19 02:47:56)
SurfacesolitonsattheedgesofgraphenenanoribbonsWedemonstratenumericallythatarmchairgraphenenanoribbonscansupport
vibrationallocalizedstatesintheformofsurfacesolitons.Suchlocalizedstatesappearthrough
self-localizationofthevibrationalenergyalongtheedgeofthegraphenenanoribbon,andthey
decayrapidlyinsidethestructure.Wefindfivetypesofsuchsolitarywavesincludingin-planeand
out-of-planeedgeb...[阅读全文]
vibrationallocalizedstatesintheformofsurfacesolitons.Suchlocalizedstatesappearthrough
self-localizationofthevibrationalenergyalongtheedgeofthegraphenenanoribbon,andthey
decayrapidlyinsidethestructure.Wefindfivetypesofsuchsolitarywavesincludingin-planeand
out-of-planeedgeb...[阅读全文]
(2010-03-19 02:47:20)
Graphenemodelocked,wavelength-tunable,dissipativesolitonfiberlaserAPPLIEDPHYSICSLETTERS96,111112(2010)Atomiclayergraphenepossesseswavelength-insensitiveultrafastsaturableabsorption,whichcanbeexploitedasa“full-band”modelocker.Withanerbium-dopeddissipativesolitonfiberlasermodelockedwithfewlayergraphene,weshowexperimentallythatdissipativesolitonswithcontinuouswavelengthtuningaslargeas30nm(1570nm-16...[阅读全文]
(2010-03-19 02:46:48)
TheDarkSideofLasersTheDarkSideofLasersSomescientificdiscoveriescompletelychangehowwelookatthings:itcertainlywasthecaseforDirac’stheoryonantimatterorEinstein’stheoryofrelativity.Now,ourexistingscientificideasaresettochangeoncemore;newexperimentsshowthatlasertheoryshouldbeextendedtoincludedarkpulseemission.
Darkpulseemission.Darkpulsesappearasintensitydipsinacontinuouslightemission,asopposedto...[阅读全文]
(2010-02-18 21:02:48)
光畴壁型暗孤子由光孤子理论可知，非线性薛定谔方程会给出两种孤子解：亮孤子和暗孤子。取决于色散和非线性之间的关系：在正色散，能支持稳定的暗孤子存在；在反常色散区间，能支持稳定的亮孤子。上述结论对于孤子研究者来说，几乎可以认为是真理了。按照目前的理论和实验发展来看，上述结论还是正确的，虽然有些特例，但是基本上也只是对非线性薛定谔方程的[阅读全文]
(2010-01-13 21:58:19)
韩语版石墨烯锁模呵呵，我们先前在nanowerk报道石墨烯锁模被韩国人翻译成韩语版了！哈哈，世界真小！想不到这么快就有好心人翻译成其他语言了，这次要请韩国朋友鉴定一下翻译的对不对了！韩国可是研究纳米材料锁模的世界中心，并且其石墨烯研究也是超前的。看来我们的研究还真的能引起一定的关注度！http://radar.ndsl.kr/tre_View.do?ct=TREND&clcd=&clk=&lp=TM&gotoPage=1&cn=GTB2010010182h[阅读全文]
(2010-01-13 21:57:23)
NaturePhotonics亮点暗孤子！暗孤子工作终于得到孤子界重视了
最近的一期naturephotonics上面，亮点我们的暗孤子工作。
这份工作可是波折万分，被OpticsLetters拖了近半年，拒了两次，当时感觉只能上opticscommunications了。幸运的是，PRA很友好的接受了我们的工作。然后又被Naturephotonics亮点了，呵呵，算上石墨烯锁模被NPG亮点，这是我们第二次上NPG。
http://www.sciencenet.cn/m/user_con[阅读全文]
(2010-01-05 19:52:24)
石墨烯可用于产生超短脉冲（AdvancedFunctionalMaterial）石墨烯可用于产生超短脉冲石墨烯自从被发现具有独特的物理性质以来，就被广大科研工作者广泛研究。例如其光波导特性，在线性光学范畴，理论和实验都证实了其光波导与波长无关，是一个恒定的常数：Finestructureconstant＝2.3％。然而，其非线性吸收特性并非如此。实验表明，当入射光强足够强的时候，其光波导呈现非线性[阅读全文]
