Ukusebenza okuphezulu kwe-laser ultrafast ubukhulu bencam yomnwe

Ukusebenza okuphezului-laser ekhawulezayoubungakanani bencam yomnwe

Ngokutsho kwenqaku elitsha elipapashwe kwiphephancwadi iSayensi, abaphandi kwiYunivesithi yeSixeko saseNew York baye babonisa indlela entsha yokudala ukusebenza okuphezulu.lasers ultrafastkwi-nanophotonics. Le ndlela encinci itshixiwelaserikhupha uthotho lwe ultra-short coherent pulses yokukhanya kwi femtosecond intervals (trillionths of second).

Imowudi ekhawulezayo itshixiweiilaserinokunceda ekutyhileni iimfihlelo zawona maxesha akhawulezayo endalo, njengokuyilwa okanye ukuqhawuka kwamaqhina eemolekyuli ngexesha lokusabela kweekhemikhali, okanye ukusasazwa kokukhanya kumajelo asasaza anesiphithiphithi. Isantya esiphezulu, incopho yepulse intensity, kunye ne-spectrum ebanzi yokugqunywa kwemode-ye-laser etshixekileyo yenza ukuba iitekhnoloji ezininzi zefoton, kubandakanya iiwotshi zeathom yokubona, umfanekiso webhayoloji, kunye neekhompyuter ezisebenzisa ukukhanya ukubala nokwenza idatha.

Kodwa ezona lasers zemowudi zitshixekileyo zisabiza kakhulu, zifuna amandla iinkqubo zedesktop ezilinganiselwe kusetyenziso lwelabhoratri. Injongo yophando olutsha kukuguqula le nto ibe yinkqubo yobungakanani be-chip enokuveliswa ngobuninzi kwaye isetyenziswe kwintsimi. Abaphandi basebenzise iqonga le-lithium niobate (i-TFLN) elicwengekileyo le-lithium ekhulayo ukubumba ngokufanelekileyo kunye nokulawula ngokuchanekileyo i-laser pulses ngokusebenzisa imiqondiso yombane yerediyo yangaphandle kuyo. Iqela lidibanise inzuzo ephezulu ye-laser ye-semiconductors yeklasi ye-III-V enobuchule obusebenzayo bokubumba i-pulse ye-TFLN nanoscale photonic waveguides ukuphuhlisa i-laser ekhupha amandla aphezulu aphezulu e-0.5 watts.

Ukongeza kubungakanani bayo obubambeneyo, obubukhulu bencam yomnwe, i-laser esanda kuboniswa imowudi etshixwayo ikwabonisa inani leepropathi ezingenakufikelelwa ziilaser zemveli, ezinjengokukwazi ukuhlengahlengisa ngokuchanekileyo umyinge wokuphinda-phindwa kwepulse ngaphezulu kwe uluhlu olubanzi lwe-200 megahertz nje ngokulungelelanisa impompo yangoku. Iqela linethemba lokuzuza i-chip-scale, i-frequency-stable comb source ngokusebenzisa uhlengahlengiso olunamandla lwe-laser, olubalulekileyo ekuvavanyeni ngokuchanekileyo. Ukusetyenziswa okusebenzayo kubandakanya ukusetyenziswa kweefowuni eziphathwayo ukuxilonga izifo zamehlo, okanye ukuhlalutya i-E. coli kunye neentsholongwane eziyingozi ekutyeni nakwindawo engqongileyo, kunye nokwenza ukukhangela xa iGPS yonakalisiwe okanye ingafumaneki.