Realization Ntawm High Optical Output Ntawm Vertical Ultraviolet Semiconductor Lasers! Kev cog lus siv tau zoo hauv Kev Kho Mob thiab Kev Lag Luam Laser

Tsis ntev los no, pab pawg tshawb fawb Nyij Pooj tau tsim cov AlGaN-raws li ntsug sib sib zog nqus ultraviolet-emitting semiconductor laser ntaus ntawv, uas yuav tsum tau siv rau hauv kev lag luam laser, biotechnology thiab tshuaj.
Raws li peb txhua tus paub, ultraviolet (UV) lub teeb yog electromagnetic yoj nrog lub wavelength ntawm 100 txog 380 nm. Cov wavelengths no tuaj yeem muab faib ua peb thaj tsam: UV-A (315-380 nm), UV-B (280-315 nm), thiab UV-C (100-280 nm). ), ob thaj tsam tom kawg uas muaj qhov sib sib zog nqus ultraviolet.
Laser lub teeb qhov chaw emitting nyob rau hauv cheeb tsam UV, xws li roj lasers thiab solid-state lasers raws li harmonics ntawm yttrium-aluminium-garnet lasers, yuav siv tau nyob rau hauv ntau yam kev siv, nrog rau biotechnology, dermatological kev kho mob, UV curing txheej txheem thiab laser. ua. Txawm li cas los xij, xws li lasers raug kev txom nyem los ntawm qhov loj me, kev siv hluav taws xob siab, kev txwv wavelength ntau yam thiab kev ua haujlwm tsawg.

Nyob rau hauv xyoo tas los no, txoj kev loj hlob ntawm high-performance semiconductor lasers uas tsim lub teeb los ntawm txhaj ib tug tam sim no tau nce nyob rau hauv parallel nrog tas mus li kev loj hlob ntawm manufacturing technology. Cov no suav nrog cov khoom siv hluav taws xob ultraviolet-emitting raws li cov khoom siv semiconductor aluminium gallium nitride AlGaN. Txawm li cas los xij, lawv qhov siab tshaj plaws tso zis hluav taws xob hauv cheeb tsam UV tob tsuas yog kwv yees li 150 mW, uas yog qis dua lub zog uas yuav tsum tau siv rau kev kho mob thiab kev lag luam. Ua kom cov cuab yeej txhaj tshuaj tam sim no yog qhov tseem ceeb los ua kom lub zog tso zis ntau ntxiv. Qhov no yuav tsum tau nce hauv cov khoom loj thiab tseem yuav tsum tau xyuas kom meej tias tam sim no ntws tsis sib xws hauv lub cuab yeej.
Nyob rau hauv cov ntsiab lus ntawm qhov kev tshawb fawb no, ib pab neeg tshawb fawb Nyij Pooj coj los ntawm Prof. Motome Iwaya ntawm Department of Materials Science thiab Engineering ntawm Meijo University tau ua tiav kev ua haujlwm siab ntsug AlGaN-hom UV-B semiconductor laser diodes. Txoj kev tshawb no tau luam tawm nyob rau hauv phau ntawv Journal Applied Physics Letters.
Prof. Motome Iwaya tau hais tias AlGaN-based sib sib zog nqus-ultraviolet lasers uas twb muaj lawm siv cov ntaub ntawv insulating xws li sapphire thiab AlN kom tau cov muaju zoo. Tab sis vim tias tam sim no ntws tom qab hauv cov khoom siv no, txhawm rau txhim kho lawv cov teeb pom kev zoo, cov kws tshawb fawb tau tshawb xyuas cov khoom siv ntsug, uas p- thiab n-electrodes ntsib ib leeg hauv ib qho kev sib tshuam pn. Tab sis ob peb xyoos dhau los no, ntsug configurations tau siv los paub txog cov khoom siv hluav taws xob semiconductor. Tab sis rau semiconductor lasers, txoj kev loj hlob ntawm xws configurations tau nyob twj ywm thiab tseem tsis tau paub txog qhov tob-ultraviolet teeb-emitting li raws li txhuas nitride. Txog rau qhov kawg no, cov kws tshawb fawb thawj zaug tau tsim cov khoom zoo txhuas nitride ntawm sapphire substrate. Periodic aluminium nitride nanopillars tau tsim thiab tso nrog aluminium nitride-raws li laser qauv.
Pab neeg no tau siv cov txheej txheem tshiab laser stripping raws li cov khoom siv hluav taws xob hauv lub xeev kom tshem tawm cov khoom siv los ntawm cov khoom siv substrate. Lawv kuj tau tsim cov txheej txheem semiconductor los tsim cov khoom siv hluav taws xob, cov qauv kev txwv tam sim no, thiab cov txheej txheem insulating uas xav tau rau laser oscillations, thiab txoj kev cleaving siv cov hniav los tsim cov khoom siv kho qhov muag zoo heev. Qhov tshwm sim AlGaN-raws li sib sib zog nqus UV-B semiconductor laser diode muaj cov khoom tshiab thiab tshwj xeeb. Nws ua haujlwm nyob rau hauv chav tsev kub, emits lub teeb ntse heev ntawm 298.1 nm, muaj ib tug zoo-txhais pib tam sim no thiab muaj zog transverse hluav taws xob polarization. Cov kws tshawb fawb kuj tau soj ntsuam ib qho chaw tshwj xeeb laser-zoo li nyob deb-tsav qauv, paub meej tias cov cuab yeej oscillations.
Txoj kev tshawb no qhia tau hais tias cov cuab yeej ntsug tuaj yeem muab cov khoom siv hluav taws xob siab rau kev ua haujlwm ntawm cov khoom siv hluav taws xob siab. Nyob rau hauv lub neej yav tom ntej, nws yuav ua lub luag haujlwm ntau dua hauv cov txheej txheem tsim nqi tshiab rau cov tsheb hluav taws xob thiab kev txawj ntse, thiab lwm yam. Thiab cov kws tshawb fawb tseem cia siab tias aluminium nitride-raws li ntsug UV lasers yuav pom cov ntawv thov hauv kev kho mob thiab kev tsim khoom.