Cov kws tshawb nrhiav los ntawm Graduate School of Engineering thiab Lub Chaw Rau Quantum Cov Ntaub Ntawv thiab Quantum Biology ntawm Osaka University tau tshaj tawm cov khoom tshiab lub xeev tshiab thib ob cov kab mob (SHG) uas hloov cov hluav taws xob infrared ua hluav taws xob xiav. Qhov kev ua haujlwm no tuaj yeem ua rau lub luag haujlwm txhua hnub-siv qhov tob tob ultraviolet lub teeb ci rau kom tsis muaj menyuam thiab tua kab mob.
Tsis ntev los no, qhov sib sib zog nqus ultraviolet (DUV) lub teeb ci tau txais ntau yam xim hauv kev ua kom tsis muaj menyuam thiab tua kab mob. Txhawm rau kom paub cov kab mob ua tau zoo thaum ua kom ntseeg tau tias tus neeg siv muaj kev nyab xeeb, qhov ntev ntawm 220-230 nm yog qhov xav tau. Tab sis DUV teeb pom kev zoo nyob rau hauv cov kab hluav taws xob no uas ob qho tib si ruaj thiab ua tau zoo heev tseem tsis tau tsim. Txawm hais tias wavelength hloov dua siab tshiab cov khoom siv yog kev txhawb nqa cov neeg sib tw, cov khoom siv hluav taws xob ua kom yooj yim hloov dua tshiab tsis tuaj yeem siv rau DUV cov khoom siv vim kev nqus rau ntug.
Txij li cov nitride semiconductors xws li gallium nitride thiab aluminium nitride muaj qhov sib txawv ntawm qhov tsis sib xws, lawv tuaj yeem siv rau wavelength hloov dua siab tshiab. Vim nws qhov pom meej rau 210 nm, txhuas nitride tshwj xeeb tshaj yog haum rau DUV wavelength hloov dua siab tshiab. Txawm li cas los xij, paub tseeb cov kev teeb tsa nrog ntu inverted polarity zoo li cov khoom siv hluav taws xob ua kom haum hloov dua siab tshiab pom tau tias nyuaj heev.
Cov kws tshawb nrhiav tau hais tawm cov ntawv tshiab monolithic microcavity wavelength hloov dua siab tshiab yam tsis muaj txheej txheem polarity-inverted. Ib qho kev yoj tseem ceeb yog ua kom muaj zog hauv microcavity nrog ob qhov faib Bragg reflectors (DBR), thiab qhov tawm tsam qhov tawm tsam ob lub suab tsis haum los cuam tshuam rau theem ntawm ib sab. Raws li thawj kauj ruam mus rau lub tswv yim DUV hom teeb ci, gallium nitride microcavity ntaus ntawv tau tsim los ntawm microfabrication technology, suav nrog qhuav etching thiab anisotropic ntub etching rau ntsug thiab du DBR sidewalls. Los ntawm tau txais cov xiav nthwv dej, qhov ua tau zoo ntawm cov tswv yim pom tau ua tiav.
& quot; Peb lub cuab yeej tuaj yeem hloov kho kom siv ntau yam khoom siv sib txawv. Lawv tuaj yeem siv rau kev sib sib zog nqus ultraviolet lub teeb pa lossis txawm tias broadband photon khub tiam," senior sau Masahiro Uemukai hais. Cov kws tshawb nrhiav vam tias vim tias txoj hauv kev no tsis cuam tshuam cov ntaub ntawv lossis cov txheej txheem hloov tsis xwm yeem, nws yuav ua rau cov cuab yeej hluav taws xob yav tom ntej tsis yooj yim rau kev tsim kho.
Dab Neeg Tau Los:
Cov Khoom Sivyog muab los ntawmOsaka Tsev Kawm Ntawv.Ntawm: Cov ntsiab lus yuav raug kho rau hom thiab ntev.
