Tshiab technology ntawmnyias silicon photodetector
Photon capture structures yog siv los txhim kho lub teeb nqus hauv nyiassilicon photodetectors
Cov tshuab hluav taws xob tau nrawm nrawm nrawm hauv ntau daim ntawv thov tshiab, suav nrog kev sib txuas lus kho qhov muag, liDAR sensing, thiab kev kho mob duab. Txawm li cas los xij, kev siv dav dav ntawm photonics hauv kev daws teeb meem engineering yav tom ntej nyob ntawm tus nqi tsim khoomphotodetectors, uas nyob rau hauv lem nyob ntawm ntau yam ntawm semiconductor siv rau lub hom phiaj ntawd.
Kev lig kev cai, silicon (Si) tau yog cov khoom siv hluav taws xob ntau tshaj plaws nyob rau hauv kev lag luam hluav taws xob, ntau npaum li cov kev lag luam feem ntau tau loj hlob ntawm cov khoom siv no. Hmoov tsis zoo, Si muaj qhov tsis muaj zog lub teeb nqus coefficient nyob ze infrared (NIR) spectrum piv rau lwm cov khoom siv hluav taws xob xws li gallium arsenide (GaAs). Vim li no, GaAs thiab lwm yam alloys yog thriving nyob rau hauv photonic daim ntaub ntawv tab sis tsis sib xws nrog ib txwm complementary hlau-oxide semiconductor (CMOS) cov txheej txheem siv nyob rau hauv zus tau tej cov electronics. Qhov no ua rau muaj kev nce ntxiv hauv lawv cov nqi tsim khoom.
Cov kws tshawb fawb tau tsim ib txoj hauv kev los txhim kho qhov zoo ntawm qhov ze-infrared nqus hauv silicon, uas tuaj yeem ua rau txo nqi ntawm cov khoom siv photonic uas ua tau zoo, thiab UC Davis pab pawg tshawb fawb tab tom tsim lub tswv yim tshiab los txhim kho lub teeb pom kev zoo hauv silicon nyias zaj duab xis. Nyob rau hauv lawv cov ntawv tshiab kawg ntawm Advanced Photonics Nexus, lawv ua qauv qhia thawj zaug kev sim ua qauv qhia ntawm silicon-raws li photodetector nrog lub teeb-capturing micro - thiab nano-nto qauv, ua tiav qhov kev ua tau zoo uas tsis tau muaj dua los piv rau GaAs thiab lwm yam III-V pawg semiconductors. . Lub photodetector muaj ib tug micron-tuab cylindrical silicon phaj muab tso rau ntawm ib tug insulating substrate, nrog hlau "ntiv tes" ncua nyob rau hauv ib tug ntiv tes diav rawg zam los ntawm kev sib cuag hlau nyob rau sab saum toj ntawm lub phaj. Qhov tseem ceeb, cov lumpy silicon yog ntim nrog lub voj voog nyob rau hauv ib lub sij hawm qauv uas ua raws li photon capture qhov chaw. Tag nrho cov qauv ntawm cov cuab yeej ua rau lub teeb tshwm sim ib txwm khoov los ntawm ze li ntawm 90 ° thaum nws tsoo rau saum npoo, tso cai rau nws nthuav tawm tom qab ntawm Si dav hlau. Cov hom kev nthuav tawm sab nraud no ua rau qhov ntev ntawm lub teeb mus ncig thiab ua rau nws qeeb qeeb, ua rau muaj kev cuam tshuam ntau dua ntawm lub teeb thiab yog li muaj zog nqus.
Cov kws tshawb fawb kuj tau ua qhov simulations kho qhov muag thiab kev tshuaj ntsuam theoretical kom nkag siab zoo dua qhov cuam tshuam ntawm photon capture cov qauv, thiab ua ntau yam kev sim piv cov photodetectors nrog thiab tsis muaj lawv. Lawv pom tias photon ntes tau ua rau muaj kev txhim kho tseem ceeb hauv kev ua haujlwm dav dav hauv NIR spectrum, nyob siab dua 68% nrog lub ncov ntawm 86%. Nws yog ib nqi sau cia hais tias nyob rau hauv lub ze infrared band, lub nqus coefficient ntawm lub photon capture photodetector yog ob peb zaug siab tshaj li ntawm zoo tib yam silicon, tshaj li gallium arsenide. Tsis tas li ntawd, txawm hais tias cov qauv tsim yog rau 1μm tuab silicon daim hlau, simulations ntawm 30 nm thiab 100 nm silicon films sib xws nrog CMOS electronics qhia zoo li kev ua tau zoo.
Zuag qhia tag nrho, cov txiaj ntsig ntawm txoj kev tshawb fawb no qhia tau tias muaj kev cog lus zoo rau kev txhim kho kev ua haujlwm ntawm silicon-based photodetectors hauv cov ntawv thov photonics tshiab. Kev nqus tau siab tuaj yeem ua tiav txawm tias nyob rau hauv ultra-thin silicon khaubncaws sab nraud povtseg, thiab Circuit Court tus kab mob parasitic capacitance yuav khaws cia tsawg, uas yog ib qho tseem ceeb nyob rau hauv high-speed systems. Tsis tas li ntawd, txoj kev npaj tau sib xws nrog cov txheej txheem tsim khoom CMOS niaj hnub no thiab yog li ntawd muaj peev xwm hloov pauv txoj kev optoelectronics tau koom ua ke rau hauv cov kab ke ib txwm muaj. Qhov no, nyob rau hauv lem, yuav ua rau txoj kev rau leaps loj heev nyob rau hauv pheej yig ultrafast computer networks thiab imaging technology.
Post lub sij hawm: Nov-12-2024