Lub tshuab photodetector silicon tshiab (Si photodetector)

Kev tawm tsamsilicon photodetector（Si photodetector）

Kev hloov pauv tshiab ntawm txhua lub silicon photodetector (Si photodetector), kev ua tau zoo tshaj qhov ib txwm muaj

Nrog rau qhov nyuaj zuj zus ntawm cov qauv kev txawj ntse thiab cov tes hauj lwm neural tob zuj zus, cov pawg suav lej ua rau muaj kev xav tau ntau dua rau kev sib txuas lus hauv network ntawm cov processors, nco thiab cov nodes suav. Txawm li cas los xij, cov tes hauj lwm ib txwm muaj ntawm-chip thiab inter-chip raws li kev sib txuas hluav taws xob tsis tau ua kom tau raws li qhov kev thov loj hlob rau bandwidth, latency thiab kev siv hluav taws xob. Yuav kom daws tau qhov teeb meem no, cov thev naus laus zis sib txuas lus optical nrog nws qhov kev ncua deb ntev, kev ceev ceev, kev siv hluav taws xob zoo, maj mam dhau los ua kev cia siab ntawm kev txhim kho yav tom ntej. Ntawm lawv, silicon photonic technology raws li CMOS txheej txheem qhia txog lub peev xwm zoo vim nws qhov kev koom ua ke siab, tus nqi qis thiab kev ua tiav qhov tseeb. Txawm li cas los xij, kev paub txog cov photodetectors ua tau zoo tseem ntsib ntau yam teeb meem. Feem ntau, cov photodetectors yuav tsum sib koom ua ke cov ntaub ntawv nrog qhov sib txawv nqaim, xws li germanium (Ge), los txhim kho kev ua tau zoo ntawm kev tshawb nrhiav, tab sis qhov no kuj ua rau cov txheej txheem tsim khoom nyuaj dua, cov nqi siab dua, thiab cov txiaj ntsig tsis zoo. Lub tshuab photodetector uas pab pawg tshawb fawb tsim tawm los ntawm tag nrho cov silicon tau ua tiav qhov ceev ntawm kev xa cov ntaub ntawv ntawm 160 Gb / s ib channel yam tsis siv germanium, nrog rau tag nrho cov bandwidth ntawm 1.28 Tb / s, los ntawm kev tsim kho tshiab dual-microring resonator.

Tsis ntev los no, ib pab pawg tshawb fawb ua ke hauv Tebchaws Meskas tau tshaj tawm ib txoj kev tshawb fawb tshiab, tshaj tawm tias lawv tau tsim tau ib lub photodiode uas muaj silicon avalanche tag nrho (APD photodetector) nti. Lub nti no muaj kev ua haujlwm ceev ceev thiab tus nqi qis photoelectric interface, uas xav tias yuav ua tiav ntau dua 3.2 Tb ib ob qhov kev xa cov ntaub ntawv hauv cov tes hauj lwm optical yav tom ntej.

Kev tshawb pom tshiab: ob chav microring resonator tsim

Cov duab thaij ib txwm muaj feem ntau muaj kev tsis sib haum xeeb ntawm bandwidth thiab kev teb. Pab pawg tshawb fawb tau ua tiav qhov kev tsis sib haum xeeb no los ntawm kev siv tus qauv tsim ob-microring resonator thiab tau zoo suppressed cross-talk ntawm cov channel. Cov txiaj ntsig ntawm kev sim qhia tau hais tias covtag nrho-silicon photodetectormuaj A teb ntawm 0.4 A/W, qhov tsaus ntuj tam sim no qis li 1 nA, bandwidth siab ntawm 40 GHz, thiab qhov hluav taws xob crosstalk qis heev ntawm tsawg dua −50 dB. Qhov kev ua tau zoo no piv rau cov photodetectors lag luam tam sim no raws li silicon-germanium thiab III-V cov ntaub ntawv.

Saib rau yav tom ntej: Txoj Kev mus rau kev tsim kho tshiab hauv kev sib txuas lus optical

Kev tsim kho zoo ntawm lub tshuab photodetector all-silicon tsis yog tsuas yog dhau qhov kev daws teeb meem ib txwm muaj hauv thev naus laus zis xwb, tab sis kuj tau txuag tau kwv yees li 40% ntawm tus nqi, ua rau txoj hauv kev rau kev paub txog cov tes hauj lwm optical ceev ceev, pheej yig yav tom ntej. Cov thev naus laus zis no sib xws nrog cov txheej txheem CMOS uas twb muaj lawm, muaj cov txiaj ntsig zoo heev thiab cov txiaj ntsig, thiab xav tias yuav dhau los ua ib qho khoom siv hauv kev siv thev naus laus zis silicon photonics yav tom ntej. Yav tom ntej, pab pawg tshawb fawb npaj yuav txuas ntxiv ua kom zoo dua qhov kev tsim qauv kom txhim kho qhov nrawm thiab kev ua haujlwm bandwidth ntawm lub photodetector los ntawm kev txo cov doping concentrations thiab txhim kho cov xwm txheej implantation. Tib lub sijhawm, kev tshawb fawb tseem yuav tshawb nrhiav seb cov thev naus laus zis all-silicon no tuaj yeem siv rau cov tes hauj lwm optical hauv cov pawg AI tiam tom ntej kom ua tiav bandwidth siab dua, scalability thiab kev siv hluav taws xob zoo.