Kev kub ceev photodetectors yog qhia los ntawm InGaAs photodetectors

Kev kub ceev photodetectors yog qhia los ntawmInGaAs photodetectors

Kev kub ceev photodetectorsHauv kev sib txuas lus kho qhov muag feem ntau suav nrog III-V InGaAs photodetectors thiab IV tag nrho Si thiab Ge /Si photodetectors. Lub qub yog ib txwm nyob ze ntawm lub tshuab ntsuas infrared, uas tau ua tiav rau lub sijhawm ntev, thaum lub sijhawm tom kawg tso siab rau silicon optical technology los ua lub hnub qub nce siab, thiab yog qhov chaw kub hauv kev tshawb fawb thoob ntiaj teb optoelectronics hauv xyoo tas los. Tsis tas li ntawd, cov khoom kuaj tshiab raws li perovskite, cov khoom siv organic thiab ob lub ntsej muag tau txhim kho sai vim qhov zoo ntawm kev ua haujlwm yooj yim, zoo yoog raws thiab tunable zog. Muaj qhov sib txawv tseem ceeb ntawm cov cuab yeej tshiab no thiab cov khoom siv hluav taws xob tsis zoo nyob hauv cov khoom siv thiab cov txheej txheem tsim khoom. Perovskite detectors muaj cov yam ntxwv zoo ntawm lub teeb pom kev zoo thiab muaj peev xwm thauj tau tus nqi, cov khoom siv hluav taws xob tau siv dav rau lawv cov nqi qis thiab hloov pauv hluav taws xob, thiab cov khoom siv ob-seem ntes tau nyiam cov xim ntau vim lawv lub cev tshwj xeeb thiab cov neeg nqa khoom siab. Txawm li cas los xij, piv nrog InGaAs thiab Si / Ge detectors, cov cuab yeej tshiab tseem yuav tsum tau txhim kho nyob rau hauv cov nqe lus ntawm kev ruaj ntseg mus ntev, kev tsim kom loj hlob thiab kev koom ua ke.

InGaAs yog ib qho ntawm cov ntaub ntawv zoo tshaj plaws rau kev paub txog kev kub ceev thiab cov lus teb siab photodetectors. Ua ntej tshaj plaws, InGaAs yog cov khoom siv ncaj qha bandgap semiconductor, thiab nws qhov dav bandgap tuaj yeem tswj hwm los ntawm qhov sib piv ntawm In thiab Ga kom ua tiav qhov kev tshawb pom ntawm optical signals ntawm txawv wavelengths. Ntawm lawv, In0.53Ga0.47As zoo sib xws nrog lub substrate lattice ntawm InP, thiab muaj ib tug loj lub teeb absorption coefficient nyob rau hauv lub optical kev sib txuas band, uas yog lub feem ntau lug siv nyob rau hauv kev npaj ntawmphotodetectors, thiab qhov tsaus ntuj tam sim no thiab kev ua haujlwm tau zoo kuj yog qhov zoo tshaj plaws. Qhov thib ob, InGaAs thiab InP cov ntaub ntawv ob leeg muaj siab electron drift tshaj tawm, thiab lawv saturated electron drift tshaj tawm yog li 1 × 107 cm / s. Nyob rau tib lub sijhawm, InGaAs thiab InP cov ntaub ntawv muaj cov hluav taws xob tshaj tawm hluav taws xob nyob rau hauv cov hluav taws xob tshwj xeeb. Lub overshoot tshaj tawm tuaj yeem muab faib ua 4 × 107cm / s thiab 6 × 107cm / s, uas yog qhov tsim nyog rau kev paub txog lub sijhawm loj ntawm lub sijhawm txwv bandwidth. Tam sim no, InGaAs photodetector yog qhov tseem ceeb tshaj plaws photodetector rau kev sib txuas lus kho qhov muag, thiab txoj kev sib txuas ntawm qhov chaw feem ntau yog siv hauv kev ua lag luam, thiab 25 Gbaud / s thiab 56 Gbaud / s nto qhov xwm txheej ntes cov khoom lag luam tau paub lawm. Qhov me me, qhov tshwm sim rov qab thiab qhov loj bandwidth nto qhov xwm txheej ntes tau kuj tau tsim, uas yog tsim nyog rau kev kub ceev thiab siab saturation daim ntaub ntawv. Txawm li cas los xij, qhov xwm txheej ntawm qhov chaw sojntsuam raug txwv los ntawm nws txoj kev sib txuas thiab nyuaj rau kev koom ua ke nrog lwm cov khoom siv optoelectronic. Yog li ntawd, nrog rau kev txhim kho ntawm optoelectronic kev koom ua ke yuav tsum, waveguide ua ke InGaAs photodetectors nrog kev ua tau zoo heev thiab haum rau kev sib koom ua ke tau maj mam dhau los ua qhov tseem ceeb ntawm kev tshawb fawb, cov uas cov lag luam 70 GHz thiab 110 GHz InGaAs photoprobe modules yuav luag tag nrho cov siv waveguide coupled qauv. Raws li cov ntaub ntawv sib txawv, cov waveguide coupling InGaAs photoelectric sojntsuam tuaj yeem muab faib ua ob pawg: InP thiab Si. Cov khoom siv epitaxial ntawm InP substrate muaj qhov zoo thiab tsim nyog rau kev npaj cov khoom siv ua haujlwm siab. Txawm li cas los xij, ntau yam tsis sib xws ntawm III-V cov ntaub ntawv, InGaAs cov ntaub ntawv thiab Si substrates zus los yog sib koom ua ke ntawm Si substrates ua rau cov khoom siv tsis zoo los yog cov khoom sib txuas zoo, thiab kev ua haujlwm ntawm cov cuab yeej tseem muaj chav loj rau kev txhim kho.