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1 Introduction Sincethe 90’s ,thefemtosecondlasertechniqueshavebeenusedtostudyvariousultra processwithinmaterials,becauseofitshightime resolution .Inchemicalreactions ,chemicalbondbreakingorbondformationisonthescaleoffemtosecond (10 - 15sec ond) [1] .Withfemtosecon… 相似文献
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