Cov kws tshawb fawb tau ua tiav thawj zaug nruam yoj laser ntawm chav tsev kub los ntawm kev sib sib zog nqus ultraviolet laser diode.
Ib pab pawg tshawb fawb coj los ntawm 2014 Nobel nqi zog tus yeej Hiroshi Amano ntawm Lub Tsev Haujlwm ntawm Cov Khoom Siv thiab Cov Txheej Txheem rau Sustainability (IMaSS) ntawm Nagoya University hauv Central Nyiv, koom tes nrog Asahi Kasei, Inc. tau ua tiav lub ntiaj teb thawj zaug txuas ntxiv-yoj laser emission los ntawm ib tug tob-ultraviolet laser diode (wavelength mus rau lub cheeb tsam UV-C) nyob rau hauv chav tsev kub. Cov txiaj ntsig, luam tawm hauv Applied Physics Letters, sawv cev rau ib kauj ruam tom ntej hauv kev siv cov thev naus laus zis uas muaj peev xwm rau ntau yam kev siv, suav nrog kev ua kom tsis muaj menyuam thiab tshuaj.
Tom qab ntau xyoo ntawm kev tshawb fawb thiab kev loj hlob txij li thaum lawv cov kev taw qhia nyob rau hauv 1960s, laser diodes (LDs) thaum kawg tau ua tiav kev lag luam. Piv txwv ntawm cov thev naus laus zis no suav nrog cov khoom siv sib txuas lus kho qhov muag siv infrared LDs thiab xiav-violet optical discs siv xiav-violet LDs. Txawm li cas los xij, txawm hais tias kev siv zog ntev thiab tsis muaj zog los ntawm cov pab pawg tshawb fawb thoob ntiaj teb, tsis muaj leej twg tuaj yeem tsim cov kab mob ultraviolet LDs tob. Tam sim no, cov kws tshawb fawb los ntawm Nagoya University thiab Asahi Kasei tau hloov kho cov qauv ntawm lub cuab yeej nws tus kheej kom txo tau lub zog tsav tsheb uas yuav tsum tau ua rau lub laser ua haujlwm ntawm chav tsev kub tsuas yog 1.1 W. Hauv cov khoom siv ua ntej, lub laser streak tended ua rau crystal defects tshwm sim. , tiv thaiv txoj hauv kev zoo tam sim no los ntawm kev tsim thiab lub laser los ntawm kev ua haujlwm ntawm lub zog siab. Nyob rau hauv txoj kev tshawb no, cov kws tshawb fawb pom tau hais tias muaj zog crystal strain ua rau cov tsis xws luag. Yog li los ntawm cleverly clipping lub sidewalls ntawm lub laser streak, lawv suppressed qhov tsis xws luag thiab ua tiav ib tug zoo tam sim no ntws mus rau lub active cheeb tsam ntawm lub laser diode, txo lub zog khiav hauj lwm.
Kev tshawb fawb yog ib qho tseem ceeb rau kev siv thiab kev txhim kho ntawm semiconductor lasers nyob rau hauv tag nrho cov wavelength ranges. Nyob rau hauv lub neej yav tom ntej, UV-C lasers yuav siv tau nyob rau hauv kev kho mob, kuaj kab mob, ntsuas particle, gas tsom xam thiab high-txhais laser ua, nrog rau tej yam hauv av-tawg daim ntaub ntawv nyob rau hauv sterilization technology.
