Mohloli o phahameng oa maqhubu a feteletseng a ultraviolet

Mohloli o phahameng oa maqhubu a feteletseng a ultraviolet

Mekhoa ea ka mor'a ho hatella e kopantsoe le masimo a mebala e 'meli e hlahisa mohloli o phahameng oa mahlaseli a kotsi a ultraviolet
Bakeng sa lits'ebetso tsa Tr-ARPES, ho fokotsa bolelele ba maqhubu a khanya ea ho khanna le ho eketsa monyetla oa ionization ea khase ke mekhoa e sebetsang ea ho fumana phallo e phahameng le li-harmonics tse phahameng. Ts'ebetsong ea ho hlahisa li-harmonics tse phahameng tse nang le makhetlo a mangata a pheta-phetoang a le mong, mokhoa oa ho pheta-pheta habeli kapa oa makhetlo a mararo o amoheloa ho eketsa katleho ea tlhahiso ea li-harmonics tse phahameng. Ka thuso ea khatello ea morao-rao, ho bonolo ho finyella matla a phahameng a matla a hlokahalang bakeng sa tlhahiso e phahameng ea harmonic ka ho sebelisa lebone le lekhutšoanyane la pulse drive, kahoo tlhahiso e phahameng ea tlhahiso e ka fumanoa ho feta ea nako e telele ea pulse drive.

Monochromator ea grating e habeli e fihlela matšeliso a pulse forward tilt
Tšebeliso ea ntho e le 'ngoe e fapaneng ho monochromator e hlahisa phetoho hoya mahlotsela ea radially ka har'a sefate sa ultra-short pulse, e tsejoang hape e le pulse forward tilt, e bakang nako e otlolohileng. Kakaretso ea phapang ea nako bakeng sa sebaka sa phapanyetsano se nang le bophahamo ba maqhubu a diffraction λ ka tatellano ea diffraction m ke Nmλ, moo N e leng kakaretso ea palo ea mela e khantšitsoeng ea grating. Ka ho kenyelletsa ntho ea bobeli e fapaneng, karolo e ka pele ea pulse e ka khutlisoa, 'me ho ka fumanoa matšeliso a monochromator ka ho lieha ha nako. 'Me ka ho lokisa tsela ea optical lipakeng tsa likarolo tse peli tsa monochromator, grating pulse shaper e ka etsoa ka mokhoa o ikhethileng ho lefella phallo ea tlhaho ea mahlaseli a kotsi a holimo. Ho sebelisa moralo oa puseletso ea tieho ea nako, Lucchini et al. e bontšitse monyetla oa ho hlahisa le ho tšoaea maqhubu a mahlaseli a kotsi a ultra-short monochromatic a feteletseng ka bophara ba 5 fs.
Sehlopha sa bafuputsi sa Csizmadia Setsing sa ELE-Alps se Setsing sa Leseli se Felletseng sa Europe se fihletse ho feto-fetoha ha molumo oa mahlaseli a mahlaseli a kotsi ka ho fetesisa ka ho sebelisa "monochromator" ea nako e habeli ea puseletso ka lebelo le phahameng le pheta-phetoang, mohala o phahameng oa boemo bo holimo. Ba hlahisitse li-harmonics tsa boemo bo holimo ba sebelisa drivelaserka lebelo la ho pheta-pheta la 100 kHz mme e fihletse bophara bo feteletseng ba ultraviolet pulse ea 4 fs. Mosebetsi ona o bula menyetla e mecha bakeng sa liteko tse rarollotsoeng ka nako ea ho lemoha situ setsing sa ELI-ALPS.

Mohloli o phahameng oa ho pheta-pheta o feteletseng oa khanya ea ultraviolet o sebelisitsoe haholo thutong ea matla a elektronike, 'me o bontšitse tebello e pharaletseng ea ts'ebeliso lefapheng la attosecond spectroscopy le imaging microscopic. Ka tsoelopele e tsoelang pele le boqapi ba mahlale le thekenoloji, maqhubu a phahameng a pheta-phetoang a ultraviolet a feteletsengmohloli o khanyange ntse e tsoela pele ka lehlakoreng la ho pheta-pheta ho phahameng, ho phahama ha photon flux, matla a phahameng a photon le bophara bo khutšoanyane ba ho otla ha pelo. Nakong e tlang, lipatlisiso tse tsoelang pele mabapi le ho pheta-pheta khafetsa mehloli ea leseli la ultraviolet le ho feta li tla khothaletsa ts'ebeliso ea tsona ho matla a elektroniki le likarolo tse ling tsa lipatlisiso. Ka nako e ts'oanang, thekenoloji ea optimization le taolo ea ho pheta-pheta khafetsa mohloli oa leseli la ultraviolet le ts'ebeliso ea eona mekhoeng ea liteko joalo ka li-angular resolution photoelectron spectroscopy le tsona e tla ba sepheo sa lipatlisiso tsa nako e tlang. Ntle le moo, theknoloji ea "attosecond transient absorption spectroscopy" e rarolletsoeng ka nako le theknoloji ea nako ea 'nete ea microscopic e ipapisitseng le matla a matla a matla a khanya ea ultraviolet le tsona li lebelletsoe ho tsoela pele ho ithutoa, ho ntlafatsoa le ho sebelisoa molemong oa ho fihlela tharollo ea nako ea attosecond e nepahetseng. le litšoantšo tse rarollotsoeng ke nanospace nakong e tlang.