Kev ua tau zoo siablaser ceev heevqhov loj ntawm ib tug ntiv tes
Raws li tsab xov xwm tshiab luam tawm hauv phau ntawv xov xwm Science, cov kws tshawb fawb ntawm City University of New York tau ua pov thawj txoj hauv kev tshiab los tsim cov kev ua tau zoocov lasers ceev heevntawm nanophotonics. Qhov miniaturized hom-xauv nolasertso tawm cov teeb ci ntsa iab luv luv ntawm femtosecond intervals (trillionths ntawm ib vib nas this).
Hom ceev heev-xauvcov laserstuaj yeem pab qhib cov lus zais ntawm lub sijhawm ceev tshaj plaws ntawm xwm, xws li kev tsim lossis tawg ntawm cov khoom sib txuas molecular thaum lub sijhawm tshuaj lom neeg, lossis kev nthuav dav ntawm lub teeb hauv cov xov xwm turbulent. Qhov ceev ceev, qhov siab tshaj plaws ntawm lub zog pulse, thiab kev npog dav dav ntawm mode-locked lasers kuj tseem ua rau ntau yam photon technologies, suav nrog optical atomic clocks, biological imaging, thiab cov khoos phis tawj uas siv lub teeb los xam thiab ua cov ntaub ntawv.
Tiam sis cov lasers mode-locked uas siab tshaj plaws tseem kim heev, siv hluav taws xob ntau heev uas tsuas yog siv rau hauv chaw kuaj mob xwb. Lub hom phiaj ntawm txoj kev tshawb fawb tshiab no yog hloov qhov no mus ua ib lub tshuab me me uas tuaj yeem tsim tau ntau thiab siv tau rau hauv thaj teb. Cov kws tshawb fawb tau siv lub platform khoom siv lithium niobate (TFLN) uas tsim los kom zoo thiab tswj tau cov laser pulses los ntawm kev siv cov teeb liab hluav taws xob sab nraud rau nws. Pab neeg tau muab cov laser gain siab ntawm cov semiconductors chav kawm III-V nrog rau cov peev xwm ua kom zoo ntawm TFLN nanoscale photonic waveguides los tsim ib lub laser uas muaj zog tshaj plaws ntawm 0.5 watts.
Ntxiv rau nws qhov me me, uas yog qhov loj li ib tug ntiv tes, lub laser mode-locked tshiab kuj qhia txog ntau yam khoom uas cov lasers ib txwm ua tsis tau, xws li lub peev xwm los kho qhov rov ua dua ntawm cov zis pulse hla ntau yam ntawm 200 megahertz tsuas yog los ntawm kev kho lub twj tso kua mis tam sim no. Pab neeg vam tias yuav ua tiav qhov sib npaug ntawm cov chip, qhov sib npaug ntawm zaus los ntawm kev hloov kho dua tshiab ntawm lub laser, uas yog qhov tseem ceeb rau kev ntsuas qhov tseeb. Cov ntawv thov siv tau suav nrog kev siv xov tooj ntawm tes los kuaj mob qhov muag, lossis los tshuaj xyuas E. coli thiab cov kab mob txaus ntshai hauv zaub mov thiab ib puag ncig, thiab los pab kom navigate thaum GPS puas tsuaj lossis tsis muaj.
Lub sijhawm tshaj tawm: Lub Ib Hlis-30-2024