Cov kws tshawb fawb nrhiav txoj hauv kev tshiab los txhim kho Laser kev daws teeb meem

Tsis ntev los no, ib pab pawg ntawm cov kws tshawb fawb los ntawm Tohoku University hauv Nyij Pooj tau ua tiav siv lub teeb pom kev zoo radially polarized laser tsom rau sab hauv ntawm cov khoom siv los tsim cov me me ntawm lub teeb, uas ua rau muaj txiaj ntsig zoo rau kev daws teeb meem ntawm cov khoom siv laser.
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 industries, 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 tseeb 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 cov nplai me me, nrog qhov tseeb hauv qab 100 nanometers dhau los ua qhov cuam tshuam tsis tau rau kev siv tshuab 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 lub focal point, ua rau qhov chaw me dua li cov kab teeb pom kev zoo. Txawm hais tias cov cuab yeej no qhia tau hais 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 cov roj-immersion lub hom phiaj rau lub laser-txiav iav substrate, lub teeb tsis khoov raws li nws dhau los ntawm cov roj thiab cov iav vim tias cov roj thiab iav muaj qhov zoo sib xws refractive indices, yog li ua kom qhov chaw ruaj khov thiab precision.
Cov kws tshawb fawb ntxiv delved rau hauv tus cwj pwm ntawm radially polarized beams thiab pom tias lub longitudinal teb yog heev txhim khu kev qha thaum lub beam tsom thiab ua ke nrog lub nplhaib zaub. 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 tau raug rho tawm ib zaug nyob rau tom qab ntawm lub iav substrate los tsim ib lub qhov 67-nanometer-diameter qhov nyob rau hauv cov khoom, ib tug loj uas yog hais txog 1/16th ntawm lub wavelength ntawm lub laser beam, ho txhim kho kev ua tau zoo.
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. "