Tsis ntev los no, ib pab neeg tshawb fawb los ntawmTohoku Universitynyob rau hauv Nyiv tau ntse siv ib tug customized radially polarized laser beam tsom nyob rau hauv lub sab hauv ntawm ib cov khoom los tsim me me me me ntawm lub teeb, uas nyob rau hauv lem ho txhim kho cov kev daws teeb meem ntawm laser cov khoom ua.
Txoj hauv kev tshiab no, cov ncauj lus kom ntxaws hauv phau ntawv xov xwm Optics Letters, revolutionizes laser processing technology.
Laser ua technology plays lub luag hauj lwm tseem ceeb nyob rau hauv ib tug xov tooj ntawm kev lag luam, xws li automotive, semiconductor, thiab kws tshuaj, tshwj xeeb tshaj yog nyob rau hauv precision machining xws li drilling thiab txiav. Txawm hais tias ultrashort pulsed laser qhov chaw muaj peev xwm ua tiav qhov kev ua tiav ntawm micron mus rau kaum tawm microns nplai, kev lag luam niaj hnub thiab kev tshawb fawb tshawb fawb tau pom qhov kev thov loj zuj zus rau kev ua me me, nrog qhov tseeb hauv qab 100 nanometers dhau los ua qhov cuam tshuam tsis tau rau cov cuab yeej tam sim no.
Cov kws tshawb fawb ntawm Tohoku University tau tsom mus rau radially polarized laser beams, tshwj xeeb vector kab teeb uas tsim cov hluav taws xob ntev ntev ntawm qhov chaw focal, ua rau qhov chaw me dua li cov kab teeb pom kev zoo. Txawm hais tias cov cuab yeej no qhia tau tias muaj peev xwm ua tau zoo, photorefraction ntawm cov khoom siv hauv huab cua ua rau qhov chaw tsis muaj zog hauv cov khoom siv, txwv nws daim ntawv thov.
Txhawm rau kov yeej qhov kev sib tw no, pab pawg tshawb fawb tau tsim tswv yim siv cov txheej txheem roj immersion lub hom phiaj, uas feem ntau siv hauv biomicroscopy. Los ntawm kev siv lub hom phiaj roj-immersion rau alaser-processed iav substrate, lub teeb tsis khoov raws li nws dhau los ntawm cov roj immersed thiab iav vim tias cov roj thiab cov iav muaj qhov zoo sib xws refractive indices, yog li ua kom qhov chaw ruaj khov thiab precision.
Cov kws tshawb fawb delved ntxiv rau tus cwj pwm ntawm radially polarized beams thiab pom tias cov longitudinal teb yog heev txhim khu kev qha thaum lub beam tsom thiab ua ke nrog lub voj voog. Qhov kev txhim kho no tshwm sim los ntawm lub siab convergence lub kaum ntse ntse tag nrho ntawm lub iav-cua interface. Siv no annular radially polarized beam, pab neeg no ua tau zoo nyob rau hauv tsim ib tug me me focal point.
Tom qab ntawd lawv tau siv cov txheej txheem rau kev ua cov iav nto nrog ib qho ultrashort pulsed laser beam. Cov mem tes hloov pauv yog raug rho tawm haujlwm ib zaug nyob rau sab nraum qab ntawm lub iav substrate los tsim ib qho 67-nanometer-inch qhov nyob rau hauv cov khoom, ib tug loj uas yog kwv yees li 1/16th ntawm lub wavelength ntawm lub laser beam, ho txhim kho kev raug.
Qhov kev rhuav tshem no tsis yog tsuas yog txhim kho qhov tseeb ntawm cov khoom siv ncaj qha los ntawm kev siv lub tshuab hluav taws xob ntev ntev, tab sis kuj muab peb txoj hauv kev yooj yim kom paub txog kev ua cov nplai tsawg dua 100 nanometers," said Yuichi Kozawa, tus kws tshaj lij ntawm Tohoku University lub koom haum rau Multidisciplinary. Kev tshawb fawb hauv Advanced Materials (IMRAM), thiab tus kws sau ntawv ntawm daim ntawv Qhov no yuav qhib qhov muaj peev xwm tshiab rau laser nanofabrication hauv ntau yam kev lag luam thiab kev tshawb fawb. "
