Cov duab thaij ceev ceev tau qhia los ntawm InGaAs photodetectors

Cov duab ceev ceev tau qhia los ntawmCov duab thaij duab InGaAs

Cov duab ceev ceevnyob rau hauv thaj chaw ntawm kev sib txuas lus kho qhov muag feem ntau suav nrog III-V InGaAs photodetectors thiab IV tag nrho Si thiab Ge /Cov duab thaij ntawm Si. Tus thawj yog lub tshuab ntes infrared ze ze, uas tau ua tus thawj coj ntev, thaum tus tom kawg vam khom 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 no. Tsis tas li ntawd, cov tshuab ntes tshiab raws li perovskite, organic thiab ob-seem cov ntaub ntawv tab tom tsim kho sai vim muaj qhov zoo ntawm kev ua tiav yooj yim, kev ywj pheej zoo thiab cov khoom kho tau. Muaj qhov sib txawv tseem ceeb ntawm cov tshuab ntes tshiab no thiab cov tshuab thaij duab inorganic ib txwm muaj hauv cov khoom siv thiab cov txheej txheem tsim khoom. Perovskite detectors muaj cov yam ntxwv zoo heev ntawm kev nqus lub teeb thiab muaj peev xwm thauj khoom zoo, cov khoom siv organic detectors siv dav rau lawv cov nqi qis thiab cov khoom siv hluav taws xob yooj yim, thiab cov khoom siv ob-seem detectors tau nyiam ntau qhov kev saib xyuas vim lawv cov khoom siv lub cev tshwj xeeb thiab kev txav mus los siab. Txawm li cas los xij, piv nrog InGaAs thiab Si / Ge detectors, cov tshuab ntes tshiab tseem yuav tsum tau txhim kho hauv kev ruaj khov mus sij hawm ntev, kev loj hlob ntawm kev tsim khoom thiab kev koom ua ke.

InGaAs yog ib qho ntawm cov ntaub ntawv zoo tshaj plaws rau kev ua kom pom kev ceev ceev thiab cov lus teb siab photodetectors. Ua ntej tshaj plaws, InGaAs yog cov khoom siv semiconductor bandgap ncaj qha, thiab nws qhov dav bandgap tuaj yeem tswj tau los ntawm qhov sib piv ntawm In thiab Ga kom ua tiav kev kuaj pom cov teeb liab optical ntawm ntau qhov wavelengths. Ntawm lawv, In0.53Ga0.47As zoo meej phim nrog lub substrate lattice ntawm InP, thiab muaj cov coefficient nqus lub teeb loj hauv cov kab sib txuas lus optical, uas yog qhov siv dav tshaj plaws hauv kev npaj ntawmphotodetectors, thiab qhov tsaus ntuj tam sim no thiab kev ua haujlwm teb kuj yog qhov zoo tshaj plaws. Qhov thib ob, InGaAs thiab InP cov ntaub ntawv ob leeg muaj qhov ceev ntawm electron drift, thiab lawv qhov ceev ntawm electron drift yog li 1 × 107 cm / s. Tib lub sijhawm, InGaAs thiab InP cov ntaub ntawv muaj qhov ceev ntawm electron overshoot effect nyob rau hauv lub teb hluav taws xob tshwj xeeb. Qhov ceev overshoot tuaj yeem faib ua 4 × 107cm / s thiab 6 × 107cm / s, uas yog qhov ua rau muaj qhov loj dua ntawm lub sijhawm txwv bandwidth. Tam sim no, InGaAs photodetector yog lub photodetector tseem ceeb tshaj plaws rau kev sib txuas lus optical, thiab txoj kev sib txuas ntawm qhov chaw feem ntau siv hauv kev ua lag luam, thiab 25 Gbaud / s thiab 56 Gbaud / s cov khoom ntes qhov chaw tau pom. Qhov me me dua, rov qab tshwm sim thiab cov bandwidth loj ntawm qhov chaw ntes kuj tau tsim, uas feem ntau yog qhov tsim nyog rau kev siv ceev thiab siab saturation. Txawm li cas los xij, qhov chaw tshwm sim probe yog txwv los ntawm nws hom kev sib txuas thiab nyuaj rau kev koom ua ke nrog lwm cov khoom siv optoelectronic. Yog li ntawd, nrog kev txhim kho ntawm cov kev xav tau kev koom ua ke optoelectronic, waveguide coupled InGaAs photodetectors nrog kev ua tau zoo heev thiab tsim nyog rau kev koom ua ke tau maj mam dhau los ua qhov tseem ceeb ntawm kev tshawb fawb, ntawm cov lag luam 70 GHz thiab 110 GHz InGaAs photoprobe modules yuav luag txhua tus siv cov qauv waveguide coupled. Raws li cov ntaub ntawv substrate sib txawv, waveguide coupling InGaAs photoelectric probe tuaj yeem faib ua ob pawg: InP thiab Si. Cov khoom siv epitaxial ntawm InP substrate muaj qhov zoo thiab tsim nyog dua rau kev npaj cov khoom siv ua tau zoo. Txawm li cas los xij, ntau yam kev tsis sib xws ntawm cov ntaub ntawv III-V, cov ntaub ntawv InGaAs thiab Si substrates loj hlob lossis sib txuas ntawm Si substrates ua rau cov khoom siv tsis zoo lossis qhov zoo ntawm interface, thiab kev ua tau zoo ntawm lub cuab yeej tseem muaj chav loj rau kev txhim kho.