Mohloli o phahameng oa khanya ea ultraviolet e feteletseng ea khafetsa

Mohloli o phahameng oa khanya ea ultraviolet e feteletseng ea khafetsa

Mekhoa ea kamora ho hatella e kopantsoeng le masimo a mebala e 'meli e hlahisa mohloli oa leseli le feteletseng la ultraviolet le phallang haholo
Bakeng sa lits'ebetso tsa Tr-ARPES, ho fokotsa bolelele ba lebone le khannang le ho eketsa monyetla oa ionization ea khase ke mekhoa e sebetsang ea ho fumana li-harmonics tse phahameng le tse phahameng. Ts'ebetsong ea ho hlahisa li-harmonics tse phahameng ka maqhubu a pheta-phetoang ka lebelo le le leng, mokhoa oa ho pheta-pheta makhetlo kapa mokhoa oa ho pheta-pheta makhetlo a mararo o sebelisoa haholo ho eketsa bokhoni ba tlhahiso ea li-harmonics tse phahameng. Ka thuso ea khatello ea kamora ho pulse, ho bonolo ho fihlela bongata ba matla a tlhoro bo hlokahalang bakeng sa tlhahiso ea harmonic e phahameng ka ho sebelisa leseli le lekhutšoanyane la pulse drive, kahoo bokhoni bo phahameng ba tlhahiso bo ka fumanoa ho feta ba pulse drive e telele.

Monochromator e nang le grating e habeli e fihlella puseletso ea ho sekamela pele ho pulse
Tšebeliso ea karolo e le 'ngoe ea diffractive ka har'a monochromator e hlahisa phetoho holeseliTsela e phatsimang ka mahlaseli a letsatsi ka har'a mahlaseli a pulse e khutšoanyane haholo, e tsejoang hape e le ho sekamela ha pulse pele, e leng se fellang ka ho otlolla nako. Phapang e felletseng ea nako bakeng sa sebaka sa diffraction se nang le bolelele ba leqhubu la diffraction λ ho odara ea diffraction m ke Nmλ, moo N e leng palo eohle ea mela e bonesitsoeng ea grating. Ka ho eketsa karolo ea bobeli ea diffractive, karolo e ka pele ea pulse e sekameng e ka tsosolosoa, 'me monochromator e nang le puseletso ea tieho ea nako e ka fumanoa. 'Me ka ho fetola tsela ea optical pakeng tsa likarolo tse peli tsa monochromator, grating pulse shaper e ka fetoloa ho lefella ka nepo ho hasana ha tlhaho ha mahlaseli a harmonic a maemo a holimo. Ba sebelisa moralo oa puseletso ea tieho ea nako, Lucchini et al. ba bontšitse monyetla oa ho hlahisa le ho khetholla li-pulse tsa ultraviolet tse khutšoanyane haholo tse nang le bophara ba pulse ba 5 fs.
Sehlopha sa lipatlisiso sa Csizmadia Setsing sa ELE-Alps Setsing sa Mabone a Maholo a Europe se fihlelletse phetoho ea spectrum le pulse ea khanya e feteletseng ea ultraviolet se sebelisa monochromator e nang le grating double time-dilay compensation mola o nang le maqhubu a mangata a pheta-phetoang, o nang le tatellano e phahameng ea harmonic. Ba hlahisitse li-harmonic tsa tatellano e phahameng ba sebelisa drive.laserka sekhahla sa ho pheta-pheta sa 100 kHz mme e fihlelletse bophara bo feteletseng ba pulse ea ultraviolet ea 4 fs. Mosebetsi ona o bula menyetla e mecha bakeng sa liteko tse rarollotsoeng ka nako setsing sa ELI-ALPS.

Mohloli oa leseli la mahlaseli a feteletseng a ultraviolet o sebelisitsoe haholo thutong ea matla a elektrone, 'me o bontšitse menyetla e mengata ea ts'ebeliso lefapheng la attosecond spectroscopy le litšoantšo tse nyenyane. Ka tsoelo-pele e tsoelang pele le boqapi ba saense le theknoloji, maqhubu a phahameng a pheta-phetoang a mahlaseli a feteletseng a ultraviolet.mohloli oa leselie ntse e hatela pele ka lehlakoreng la maqhubu a ho pheta-pheta a phahameng, phallo e phahameng ea photon, matla a phahameng a photon le bophara bo bokhutšoanyane ba pulse. Nakong e tlang, lipatlisiso tse tsoelang pele mabapi le mehloli ea leseli le phahameng la ultraviolet le tla ntšetsa pele ts'ebeliso ea tsona ho matla a elektroniki le masimong a mang a lipatlisiso. Ka nako e ts'oanang, theknoloji ea ntlafatso le taolo ea mohloli oa leseli le phahameng la ultraviolet le ts'ebeliso ea lona mekhoeng ea liteko joalo ka angular resolution photoelectron spectroscopy le eona e tla ba sepheo sa lipatlisiso tsa nakong e tlang. Ho phaella moo, theknoloji ea attosecond transient absorption spectroscopy e rarollotsoeng ka nako le theknoloji ea microscopic imaging ea nako ea sebele e thehiloeng mohloling oa leseli le phahameng la ultraviolet le tsona li lebelletsoe ho ithutoa haholoanyane, ho ntlafatsoa le ho sebelisoa e le ho fihlela setšoantšo se nepahetseng sa attosecond time-resolved le nanospace-resolved nakong e tlang.