石墨片超快激光器閃耀登場！http://www.optochina.net/html/news/10230.html英國劍橋大學及法國CNRS的研究人員已經製造出超快鎖模(mode-locked)石墨片(graphene)激光器。由於石墨片為零能隙的半導體，這項研究成果不僅令人意外，而且顯示了石墨片在光電器件上大有可為。 石墨片為蜂巢晶格的碳原子平麵，其電子能以極高速運動，行為類似無靜止質量的相對論性粒子，亦即所謂的狄拉克[閱讀全文]
vector soliton
介紹科學研究
博文
(2010-03-29 06:55:12)
石墨片超快激光器閃耀登場！http://www.optochina.net/html/news/10230.html英國劍橋大學及法國CNRS的研究人員已經製造出超快鎖模(mode-locked)石墨片(graphene)激光器。由於石墨片為零能隙的半導體，這項研究成果不僅令人意外，而且顯示了石墨片在光電器件上大有可為。 石墨片為蜂巢晶格的碳原子平麵，其電子能以極高速運動，行為類似無靜止質量的相對論性粒子，亦即所謂的狄拉克[閱讀全文]
(2010-03-19 02:48:56)
GrapheneandLasersBecomeUltrafastFriends
GrapheneandLasersBecomeUltrafastFriends
Ultrafastlasersourceshavegarneredconsiderableattentionfortheirmanypotentialapplications,rangingfrommeteorologytotelecommunications,medicine,andmaterialsprocessing.Mostoftheselasersemployamode-lockingtechniqueinwhichanonlinearopticalelement,calledasaturableabsorber,turnsthelaser’scontinuouswaveoutputintoatraino...[閱讀全文]
GrapheneandLasersBecomeUltrafastFriends
Ultrafastlasersourceshavegarneredconsiderableattentionfortheirmanypotentialapplications,rangingfrommeteorologytotelecommunications,medicine,andmaterialsprocessing.Mostoftheselasersemployamode-lockingtechniqueinwhichanonlinearopticalelement,calledasaturableabsorber,turnsthelaser’scontinuouswaveoutputintoatraino...[閱讀全文]
(2010-03-19 02:48:25)
Graphene-basedlong-waveinfraredTMsurfaceplasmonmodulator
Graphene-basedlong-waveinfraredTMsurfaceplasmonmodulator
Wedescribetheoreticallyanewlong-waveinfraredopticalmodulatorbasedonthecharacteristicsofTMsurfaceplasmonsingraphene.Calculationsmadeusingafinite-τrandomphaseapproximationmodel,ofrelevantsurface
plasmonpropagationparameters,arepresented.Weshowthattheplasmonlossesvaryasafunct...[閱讀全文]
Graphene-basedlong-waveinfraredTMsurfaceplasmonmodulator
Wedescribetheoreticallyanewlong-waveinfraredopticalmodulatorbasedonthecharacteristicsofTMsurfaceplasmonsingraphene.Calculationsmadeusingafinite-τrandomphaseapproximationmodel,ofrelevantsurface
plasmonpropagationparameters,arepresented.Weshowthattheplasmonlossesvaryasafunct...[閱讀全文]
(2010-03-19 02:47:56)
SurfacesolitonsattheedgesofgraphenenanoribbonsWedemonstratenumericallythatarmchairgraphenenanoribbonscansupport
vibrationallocalizedstatesintheformofsurfacesolitons.Suchlocalizedstatesappearthrough
self-localizationofthevibrationalenergyalongtheedgeofthegraphenenanoribbon,andthey
decayrapidlyinsidethestructure.Wefindfivetypesofsuchsolitarywavesincludingin-planeand
out-of-planeedgeb...[閱讀全文]
vibrationallocalizedstatesintheformofsurfacesolitons.Suchlocalizedstatesappearthrough
self-localizationofthevibrationalenergyalongtheedgeofthegraphenenanoribbon,andthey
decayrapidlyinsidethestructure.Wefindfivetypesofsuchsolitarywavesincludingin-planeand
out-of-planeedgeb...[閱讀全文]
(2010-03-19 02:47:20)
Graphenemodelocked,wavelength-tunable,dissipativesolitonfiberlaserAPPLIEDPHYSICSLETTERS96,111112(2010)Atomiclayergraphenepossesseswavelength-insensitiveultrafastsaturableabsorption,whichcanbeexploitedasa“full-band”modelocker.Withanerbium-dopeddissipativesolitonfiberlasermodelockedwithfewlayergraphene,weshowexperimentallythatdissipativesolitonswithcontinuouswavelengthtuningaslargeas30nm(1570nm-16...[閱讀全文]
(2010-03-19 02:46:48)
TheDarkSideofLasersTheDarkSideofLasersSomescientificdiscoveriescompletelychangehowwelookatthings:itcertainlywasthecaseforDirac’stheoryonantimatterorEinstein’stheoryofrelativity.Now,ourexistingscientificideasaresettochangeoncemore;newexperimentsshowthatlasertheoryshouldbeextendedtoincludedarkpulseemission.
Darkpulseemission.Darkpulsesappearasintensitydipsinacontinuouslightemission,asopposedto...[閱讀全文]
(2010-02-18 21:02:48)
光疇壁型暗孤子由光孤子理論可知，非線性薛定諤方程會給出兩種孤子解：亮孤子和暗孤子。取決於色散和非線性之間的關係：在正色散，能支持穩定的暗孤子存在；在反常色散區間，能支持穩定的亮孤子。上述結論對於孤子研究者來說，幾乎可以認為是真理了。按照目前的理論和實驗發展來看，上述結論還是正確的，雖然有些特例，但是基本上也隻是對非線性薛定諤方程的[閱讀全文]
(2010-01-13 21:58:19)
韓語版石墨烯鎖模嗬嗬，我們先前在nanowerk報道石墨烯鎖模被韓國人翻譯成韓語版了！哈哈，世界真小！想不到這麽快就有好心人翻譯成其他語言了，這次要請韓國朋友鑒定一下翻譯的對不對了！韓國可是研究納米材料鎖模的世界中心，並且其石墨烯研究也是超前的。看來我們的研究還真的能引起一定的關注度！http://radar.ndsl.kr/tre_View.do?ct=TREND&clcd=&clk=&lp=TM&gotoPage=1&cn=GTB2010010182h[閱讀全文]
(2010-01-13 21:57:23)
NaturePhotonics亮點暗孤子！暗孤子工作終於得到孤子界重視了
最近的一期naturephotonics上麵，亮點我們的暗孤子工作。
這份工作可是波折萬分，被OpticsLetters拖了近半年，拒了兩次，當時感覺隻能上opticscommunications了。幸運的是，PRA很友好的接受了我們的工作。然後又被Naturephotonics亮點了，嗬嗬，算上石墨烯鎖模被NPG亮點，這是我們第二次上NPG。
http://www.sciencenet.cn/m/user_con[閱讀全文]
(2010-01-05 19:52:24)
石墨烯可用於產生超短脈衝（AdvancedFunctionalMaterial）石墨烯可用於產生超短脈衝石墨烯自從被發現具有獨特的物理性質以來，就被廣大科研工作者廣泛研究。例如其光波導特性，在線性光學範疇，理論和實驗都證實了其光波導與波長無關，是一個恒定的常數：Finestructureconstant＝2.3％。然而，其非線性吸收特性並非如此。實驗表明，當入射光強足夠強的時候，其光波導呈現非線性[閱讀全文]
