Laser "carving" pob zeb diamond: kov yeej cov khoom nyuaj tshaj plaws nrog lub teeb
Pob zeb diamondyog cov khoom nyuaj tshaj plaws hauv xwm, tab sis nws tsis yog cov hniav nyiaj hniav kub xwb. Cov khoom siv no muaj kev coj ua cua sov tsib zaug sai dua li tooj liab, tuaj yeem tiv taus cua sov thiab hluav taws xob hnyav, tuaj yeem xa lub teeb, rwb thaiv tsev, thiab txawm tias tuaj yeem hloov mus ua semiconductor. Txawm li cas los xij, nws yog cov "muaj zog loj" no uas ua rau pob zeb diamond ua cov khoom siv "nyuaj tshaj plaws" rau kev ua - cov cuab yeej ib txwm tsis tuaj yeem txiav nws lossis tawm cov kab nrib pleb. Nws tsis yog txog thaum muaj kev tshwm sim ntawm cov thev naus laus zis laser uas tib neeg thaum kawg pom tus yuam sij los kov yeej qhov "vaj ntxwv ntawm cov khoom siv" no.
Vim li cas thiaj siv laser "txiav" pob zeb diamond tau?
Xav txog seb koj siv lub iav tsom kom pom lub hnub ci kom ci daim ntawv. Lub hauv paus ntsiab lus ntawm kev ua cov pob zeb diamond los ntawm laser zoo sib xws, tab sis meej dua. Thaum lub teeb laser muaj zog heev ci cov pob zeb diamond, qhov "carbon atom metamorphosis" me me tshwm sim:
1. Pob zeb diamond hloov mus ua graphite: Lub zog laser hloov cov qauv pob zeb diamond saum npoo (sp³) mus ua graphite mos dua (sp²), ib yam li pob zeb diamond tam sim ntawd "degenerates" mus ua ib qho xaum.
2. Graphite "evaporated": cov txheej graphite sublimates ntawm qhov kub siab lossis raug etched los ntawm oxygen, tawm hauv cov cim ua tiav. 3. Kev tshawb pom tseem ceeb: qhov tsis zoo Hauv kev xav, pob zeb diamond zoo meej tsuas yog tuaj yeem ua tiav los ntawm ultraviolet laser (wavelength <229 nm), tab sis qhov tseeb, pob zeb diamond dag yeej ib txwm muaj qhov tsis zoo me me (xws li cov khoom tsis huv thiab cov ciam teb noob). Cov qhov tsis zoo no zoo li "qhov" uas tso cai rau lub teeb ntsuab ib txwm (532 nm) lossis infrared laser (1064 nm) kom nqus tau. Cov kws tshawb fawb txawm tias tuaj yeem "hais kom" lub laser txiav ib qho qauv tshwj xeeb ntawm pob zeb diamond los ntawm kev tswj hwm qhov kev faib tawm ntawm qhov tsis zoo.
Hom Laser: Kev Hloov Pauv Los Ntawm "cub" Mus Rau "knife ice"
Kev ua laser ua ke cov tshuab computer numerical control, cov tshuab optical siab heev, thiab kev ua haujlwm siab thiab tsis siv neeg los tsim ib qho chaw tshawb fawb thiab chaw tsim khoom. Siv rau kev ua pob zeb diamond, nws tuaj yeem ua tiav kev ua haujlwm zoo thiab raug.
1. Kev ua cov microsecond laser Microsecond laser pulse dav thiab feem ntau yog qhov tsim nyog rau kev ua cov txheej txheem ntxhib. Ua ntej qhov tshwm sim ntawm hom kev xauv tshuab, laser pulses feem ntau yog nyob rau hauv microsecond thiab nanosecond ntau yam. Tam sim no, muaj ob peb daim ntawv qhia txog kev ua cov pob zeb diamond ncaj qha nrog microsecond lasers, thiab feem ntau ntawm lawv tsom mus rau qhov kev siv ua cov txheej txheem tom qab.
2. Kev ua cov nanosecond laser Nanosecond lasers tam sim no nyob hauv kev lag luam loj thiab muaj qhov zoo ntawm kev ruaj khov zoo, tus nqi qis, thiab lub sijhawm ua haujlwm luv luv. Lawv siv dav hauv kev tsim khoom lag luam. Txawm li cas los xij, cov txheej txheem nanosecond laser ablation yog thermally puas tsuaj rau cov qauv, thiab qhov macroscopic manifestation yog tias cov txheej txheem tsim tawm thaj chaw loj-cuam tshuam los ntawm cua sov.
3. Kev ua haujlwm laser Picosecond Kev ua haujlwm laser Picosecond yog nyob nruab nrab ntawm nanosecond laser thermal equilibrium ablation thiab femtosecond laser txias ua haujlwm. Lub sijhawm pulse raug txo qis heev, uas txo qhov kev puas tsuaj los ntawm thaj chaw kub-cuam tshuam.
4. Kev ua haujlwm ntawm Femtosecond laser Kev siv tshuab laser ceev heev coj cov cib fim rau kev ua cov pob zeb diamond zoo, tab sis tus nqi siab thiab tus nqi txij nkawm ntawm femtosecond lasers txwv tsis pub txhawb nqa cov txheej txheem ua haujlwm. Tam sim no, feem ntau cov kev tshawb fawb cuam tshuam tseem nyob hauv theem kuaj mob.
Xaus lus
Txij li "tsis muaj peev xwm txiav" mus rau "txiav raws li qhov xav tau", kev siv tshuab laser tau ua raupob zeb diamond tsis yog ib lub "lub thoob" uas raug kaw hauv chav kuaj mob lawm. Nrog rau kev siv thev naus laus zis tshiab, yav tom ntej peb yuav pom: cov pob zeb diamond uas ua rau lub xov tooj ntawm tes tsis kub, cov khoos phis tawj quantum siv pob zeb diamond los khaws cov ntaub ntawv, thiab txawm tias cov biosensors pob zeb diamond cog rau hauv lub cev tib neeg ... Qhov kev seev cev ntawm lub teeb thiab pob zeb diamond no tab tom hloov peb lub neej.