Laser "carving" pob zeb diamond: kov yeej cov khoom nyuaj tshaj plaws nrog lub teeb
Pob zeb diamondyog cov khoom hnyav tshaj plaws hauv qhov, tab sis nws tsis yog cov hniav nyiaj hniav kub xwb. Cov khoom no muaj cov thermal conductivity tsib zaug sai dua tooj liab, tuaj yeem tiv taus huab cua kub thiab hluav taws xob, tuaj yeem xa lub teeb, rwb thaiv tsev, thiab tuaj yeem hloov mus rau hauv semiconductor. Txawm li cas los xij, nws yog cov "superpowers" uas ua rau pob zeb diamond yog "qhov nyuaj tshaj plaws" cov ntaub ntawv los ua - cov cuab yeej ib txwm tsis tuaj yeem txiav nws lossis tawm ntawm cov kab nrib pleb. Nws tsis yog txog thaum lub tswv yim ntawm laser thev naus laus zis uas tib neeg thaum kawg nrhiav tau tus yuam sij kom kov yeej qhov "tus huab tais ntawm cov ntaub ntawv".
Vim li cas laser "txiav" pob zeb diamond?
Xav txog kev siv lub iav tsom iav kom pom lub hnub ci kom pom daim ntawv. Lub hauv paus ntsiab lus ntawm laser ua pob zeb diamond zoo sib xws, tab sis ntau meej. Thaum lub zog loj laser beam irradiates pob zeb diamond, microscopic "carbon atom metamorphosis" tshwm sim:
1. Pob zeb diamond hloov mus rau hauv graphite: Lub zog laser hloov cov pob zeb diamond nto (sp³) ua softer graphite (sp²), ib yam li lub pob zeb diamond tam sim ntawd "degenerates" rau hauv cov xaum xaum.
2. Graphite yog "evaporated": graphite txheej sublimates ntawm qhov kub thiab txias los yog etched los ntawm oxygen, tawm hauv cov cim ua tiav. 3. Qhov tseem ceeb ntawm kev tawg: qhov tsis xws luag hauv txoj kev xav, pob zeb zoo nkauj tsuas tuaj yeem ua tiav los ntawm ultraviolet laser (wavelength <229 nm), tab sis qhov tseeb, pob zeb diamond dag ib txwm muaj qhov tsis xws luag (xws li impurities thiab grain ciam). Cov teeb meem no zoo li "qhov" uas tso cai rau lub teeb ntsuab zoo tib yam (532 nm) lossis infrared laser (1064 nm) kom nqus tau. Cov kws tshawb fawb tseem tuaj yeem "hais kom" lub laser los kos cov qauv tshwj xeeb ntawm pob zeb diamond los ntawm kev tswj xyuas qhov tsis xws luag.
Laser hom: Evolution ntawm "lub cub tawg" mus rau "ice riam"
Laser processing combines computer numerical control systems, advanced optical systems, thiab high-precision and automated workpiece positioning to form a research and production processing center. Siv rau kev ua cov pob zeb diamond, nws tuaj yeem ua tau zoo thiab ua haujlwm siab.
1. Microsecond laser processing Microsecond laser mem tes dav dav thiab feem ntau haum rau kev ua haujlwm ntxhib. Ua ntej qhov tshwm sim ntawm hom xauv tshuab, laser pulses feem ntau nyob rau hauv microsecond thiab nanosecond ntau. Tam sim no, muaj ob peb cov lus ceeb toom ntawm kev ua cov pob zeb diamond ncaj qha nrog microsecond lasers, thiab feem ntau ntawm lawv tsom mus rau qhov rov qab-kawg ua daim ntawv thov teb.
2. Nanosecond laser processing Nanosecond lasers tam sim no nyob hauv kev lag luam loj thiab muaj qhov zoo ntawm kev ruaj ntseg zoo, tus nqi qis, thiab lub sijhawm ua haujlwm luv. Lawv tau siv dav hauv kev tsim khoom lag luam. Txawm li cas los xij, nanosecond laser ablation txheej txheem yog thermally puas rau tus qauv, thiab macroscopic manifestation yog tias cov txheej txheem ua rau thaj tsam loj heev.
3. Picosecond laser processing Picosecond laser processing yog nruab nrab ntawm nanosecond laser thermal equilibrium ablation thiab femtosecond laser txias ua. Lub sijhawm mem tes yog txo qis, uas ua rau txo qis kev puas tsuaj los ntawm thaj chaw uas muaj cua sov.
4. Femtosecond laser processing Ultrafast laser technology coj lub cib fim rau pob zeb diamond zoo ua, tab sis tus nqi siab thiab tu nqi ntawm femtosecond lasers txwv kev nce qib ntawm kev ua. Tam sim no, feem ntau cov kev tshawb fawb ntsig txog tseem nyob hauv chav kuaj.
Xaus
Los ntawm "tsis tuaj yeem txiav" mus rau "carve ntawm lub siab", laser tshuab tau uapob zeb diamond tsis yog ib tug "vase" dai nyob rau hauv lub chav kuaj. Nrog rau kev siv thev naus laus zis, yav tom ntej peb yuav pom: pob zeb diamond chips dissipating tshav kub hauv xov tooj ntawm tes, quantum computers siv pob zeb diamond los khaws cov ntaub ntawv, thiab txawm tias pob zeb diamond biosensors cog rau hauv tib neeg lub cev… Qhov kev seev cev ntawm lub teeb thiab pob zeb diamond no hloov peb lub neej.