Laser yoyendetsa imatsimikiza malire apamwamba a gwero la kuwala kwa laser ya attosecond

Laser yoyendetsa imatsimikiza malire apamwamba alaser ya attosecondgwero la kuwala.
Pakadali pano,lasers ya attosecond pulseAmapangidwa makamaka kudzera mu kupanga kwapamwamba kwa harmonic (HHG) komwe kumayendetsedwa ndi minda yamphamvu. Kupangidwa kwawo kumatha kumveka ngati ma electron omwe amasinthidwa kukhala ion, kufulumizitsidwa, ndikugwirizanitsidwanso kuti atulutse mphamvu, motero amatulutsa ma pulses a attosecond XUV.
Chifukwa chake, kutulutsa kwa ma attosecond pulses kumakhala kogwirizana kwambiri ndi m'lifupi mwa ma pulse, mphamvu, kutalika kwa mafunde, ndi kuchuluka kwa ma frequency obwerezabwereza a laser yoyendetsa: m'lifupi mwa ma pulse afupiafupi amathandiza kuti ma attosecond pulses asiyane, mphamvu zambiri zimathandizira kuti ma ionization ndi magwiridwe antchito azitha, kutalika kwa mafunde kumakweza mphamvu yodulira koma kumachepetsa kwambiri mphamvu yosinthira, ndipo ma frequency obwerezabwereza apamwamba amawongolera chiŵerengero cha chizindikiro-ku-phokoso koma amachepetsedwa ndi mphamvu ya single-pulse.
Mapulogalamu osiyanasiyana amayang'ana kwambiri zizindikiro zosiyanasiyana zofunika za attosecond lasers, motero zimagwirizana ndi zisankho za mapangidwe a mitundu yosiyanasiyana ya kuyendetsa.magwero a laser.
Pa ntchito monga kafukufuku wa ultrafast dynamics ndi ma electron microscopy, stable isolation of attosecond pulses (IAP) nthawi zambiri imafuna short-pulse driving pulses ndi good carrier envelope phase (CEP) control kuti ikwaniritse nthawi yogwira ntchito bwino komanso kulamulira mafunde;
Pa zoyeserera monga pump-probe spectroscopy ndi multi-photon ionization, high-energy kapena high-flux attosecond radiation zimathandiza kukonza mphamvu yotulutsa/kuyamwa, zomwe nthawi zambiri zimapezeka pogwiritsa ntchito mphamvu yoyendetsa komanso mphamvu yapakati kudzera mu HHG, ndipo zimafuna kusunga mawonekedwe oyenera a phase matching ndi beam quality pansi pa mikhalidwe ya ionization yapamwamba;
Kuti apange ma radiation a attosecond mu zenera la X-ray (lomwe ndi lofunika kwambiri pa kujambula kogwirizana ndi nthawi yokhazikika ya X-ray absorption spectroscopy), kuyendetsa kwa mafunde a mid-infrared long-wavelength nthawi zambiri kumagwiritsidwa ntchito kuwonjezera mphamvu ya harmonic cutoff ndikupeza mphamvu yayikulu ya photon;
Mu miyeso yomwe imazindikira kulondola kwa ziwerengero, monga kuwerengera ndi photoelectron spectroscopy, kuchuluka kwa ma frequency obwerezabwereza kumatha kusintha kwambiri chiŵerengero cha ma signal-to-noise ndi magwiridwe antchito a deta, pomwe kuchepa kwa mphamvu/mphamvu ya single-pulse kumathandiza kuchepetsa kuchepa kwa mphamvu ya malo pa mphamvu yamagetsi.
Kugwirizana pakati pa magawo a laser yoyendetsa, mawonekedwe a laser ya attosecond pulse, ndi zofunikira pakugwiritsa ntchito kwawonetsedwa pa Chithunzi 1. Ponseponse, zofunikira pakugwiritsa ntchito nthawi zonse zimayendetsa bwino magawo a laser ya attosecond pulse, motero zimayendetsa chitukuko chopitilira cha kapangidwe ndi ukadaulo wofunikira walaser yothamanga kwambirimachitidwe.