Ubuchwepheshe nezitayela zokuthuthuka zama-laser e-attosecond e-China
I-Institute of Physics, i-Chinese Academy of Sciences, ibike imiphumela yokulinganisa ye-160 njengama-atosecond pulses ahlukanisiwe ngo-2013. I-isolated attosecond pulses (IAPs) yaleli thimba locwaningo yenziwe ngokususelwa kuma-harmonics okuhleleka okuphezulu aqhutshwa yi-sub-5 femtosecond laser pulses ezinziswe yi-CEP isilinganiso se-kEPtiH. Izici zesikhashana ze-attosecond pulses zazibonakala nge-attosecond stretch spectroscopy. Imiphumela ibonisa ukuthi lo mugqa we-beam unganikeza ama-attosecond pulses ahlukanisiwe ubude be-pulse yama-attoseconds angu-160 kanye nobude obumaphakathi obungu-82eV. Ithimba lenze impumelelo ekukhiqizeni umthombo we-attosecond kanye nobuchwepheshe be-spectroscopy obunwebeka be-attosecond. Imithombo yokukhanya kwe-ultraviolet eyeqisayo enokulungiswa kwe-attosecond izophinda ivule izinkambu ezintsha zohlelo lwefiziksi yento efingqiwe. Ngo-2018, i-Institute of Physics, i-Chinese Academy of Sciences, iphinde yabika ngohlelo lokwakha lwedivayisi yokulinganisa exazululwe ngokushesha kakhulu ehlanganisa imithombo yokukhanya ye-attosecond namatheminali okulinganisa ahlukahlukene. Lokhu kuzokwenza abacwaningi bakwazi ukwenza i-attosecond eguquguqukayo ukuya ku-femtosecond izilinganiso ezixazululwe zezikhathi zezinqubo ezisheshayo odabeni, kuyilapho zinomfutho kanye nesixazululo sendawo. Futhi ivumela abacwaningi ukuthi bahlole futhi balawule i-microscopic ultrafast electronic dynamics kuma-athomu, ama-molecule, izindawo ezingaphezulu nezinto eziqinile eziyinqwaba. Lokhu ekugcineni kuzovula indlela yokuqonda nokusebenzisa izenzakalo ze-macroscopic ezifanele ezihlanganisa imikhakha yocwaningo eminingi efana ne-physics, chemistry kanye ne-biology.
Ngo-2020, i-Huazhong University of Science and Technology yenza isiphakamiso sokuthi kusetshenziswe indlela yokubona konke ukuze kulinganiswe ngokunembile futhi kwakhiwe kabusha ama-attosecond pulses ngobuchwepheshe bokubona obuxazululwe yi-frequency. Ngo-2020, i-Chinese Academy of Sciences iphinde yabika ukuthi ikhiqize ngempumelelo ama-attosecond pulses ahlukanisiwe ngokubumba inkambu ye-femtosecond pulse photoelectric ngokusebenzisa ukusetshenziswa kobuchwepheshe besango lokungena elikhanyayo elikabili. Ngo-2023, ithimba elivela ku-National University of Defence Technology lenza isiphakamiso esisheshayo senqubo ye-PROOF, ebizwa nge-qPROOF, ukuze kubonakale ama-ultra-wideband ahlukene e-atosecond pulses.
Ngo-2025, abacwaningi abavela ku-Chinese Academy of Sciences e-Shanghai bathuthukisa ubuchwepheshe bokuvumelanisa i-laser obususelwe kusistimu yokuvumelanisa yesikhathi eyakhiwe ngokuzimela, okuvumela ukulinganiswa kwe-jitter yesikhathi esinembayo kanye nempendulo yesikhathi sangempela yama-lasecond lasers. Lokhu akulawulanga nje kuphela i-jitter yesikhathi yesistimu phakathi kwebanga le-attosecond kodwa kuphinde kwathuthukisa ukwethembeka kwesistimu ye-laser phakathi nokusebenza kwesikhathi eside. Isistimu yokuhlaziya nokulawula ethuthukisiwe ingenza ukulungiswa kwesikhathi sangempela ku-jitter yesikhathi. Ngawo lowo nyaka, abacwaningi baphinde basebenzisa amalaser we-relativistic intensity spacetime vortices (STOV) ukuze bakhe ama-atosecond gamma-ray pulses ahlukene aphethe umfutho we-lateral orbital angular.
Umkhakha wama-lasecond lasers usesikhathini sokuthuthuka okusheshayo, ohlanganisa izici eziningi ukusuka ocwaningweni oluyisisekelo kuye ekunyusweni kwesicelo. Ngemizamo yamaqembu ocwaningo lwesayensi, ukwakhiwa kwengqalasizinda, ukusekelwa kwezinqubomgomo zikazwelonke, nokubambisana nokuhwebelana kwasekhaya nekwamanye amazwe, ukwakheka kweShayina emkhakheni we-laser ye-attosecond kuzojabulela amathemba abanzi entuthuko. Njengoba amanyuvesi amaningi kanye nezikhungo zocwaningo zijoyina ucwaningo lwama-laser e-attosecond, iqembu lamathalente ocwaningo lwesayensi anombono wamazwe ngamazwe kanye nekhono lokusungula lizotshalwa, kuthuthukiswe intuthuko esimeme yesayensi ye-attosecond. Isikhungo Sikazwelonke se-Attosecond esikhulu sesayensi sizohlinzeka ngenkundla yocwaningo ehamba phambili yomphakathi wesayensi futhi senze igalelo elikhulu ekuthuthukisweni kwesayensi nobuchwepheshe.
Isikhathi sokuthumela: Aug-26-2025