Kev Tshawb Fawb Tshiab ntawm Tsawg-dimensional Avalanche Photodetector

Kev Tshawb Fawb Tshiab ntawm Tsawg-dimensional Avalanche Photodetector

High-rhiab heev nrhiav tau ntawm ob peb-photon los yog ib leeg-photon technologies tuav cov ntaub ntawv tseem ceeb nyob rau hauv cov teb xws li low-light imaging, remote sensing and telemetry, as well as quantum communication. Ntawm lawv, avalanche photodetectors (APD) tau dhau los ua ib qho tseem ceeb hauv kev tshawb fawb ntawm optoelectronic ntaus ntawv vim lawv qhov me me, kev ua haujlwm siab thiab kev sib koom ua ke yooj yim. Lub teeb liab-rau-nrawm piv (SNR) yog qhov taw qhia tseem ceeb ntawm APD Photodetector, uas yuav tsum tau nce siab thiab qis tam sim no. Kev tshawb fawb ntawm ob-dimensional (2D) cov ntaub ntawv van der Waals heterojunctions qhia dav dav hauv kev txhim kho cov kev ua tau zoo APDs. Cov kws tshawb fawb los ntawm Tuam Tshoj tau xaiv cov khoom siv bipolar ob-dimensional semiconductor WSe₂ ua cov khoom siv photosensitive thiab ua tib zoo npaj Pt / Wse₂ / Ni qauvAPD Photodetectornrog rau kev ua haujlwm zoo tshaj plaws los daws qhov teeb meem ntawm lub suab nrov ntawm APD ib txwm muaj.

Cov kws tshawb fawb tau thov ib qhoLub avalanche photodetectorRaws li tus qauv Pt/Wse₂/Ni, ua tiav qhov kev tshawb pom tau zoo heev ntawm lub teeb tsis muaj zog heev ntawm fW theem ntawm chav tsev kub. Lawv xaiv cov khoom siv ob-dimensional semiconductor WSe₂, uas muaj cov khoom siv hluav taws xob zoo, thiab ua ke nrog Pt thiab Ni electrode cov ntaub ntawv kom ua tiav ib hom tshiab ntawm avalanche photodetector. Los ntawm kev ua kom zoo dua qhov ua haujlwm zoo sib xws ntawm Pt, WSe₂ thiab Ni, lub tshuab thauj khoom tau tsim los uas tuaj yeem thaiv cov neeg nqa khoom tsaus nti thaum xaiv cov neeg nqa khoom photogenerated hla dhau. Cov txheej txheem no txo ​​cov suab nrov ntau dhau los ntawm cov cab kuj cuam tshuam ionization, ua kom lub photodetector ua tiav cov teeb liab kho qhov muag pom tau zoo heev ntawm cov suab nrov tsawg.

Txoj kev tshawb no qhia txog lub luag haujlwm tseem ceeb ntawm cov khoom siv engineering thiab kev sib txuas kom zoo hauv kev txhim kho kev ua haujlwm ntawmphotodetectors. Los ntawm ingenious tsim ntawm electrodes thiab ob-seem cov ntaub ntawv, lub shielding nyhuv ntawm cov neeg nqa khoom tsaus tau ua tiav, txo cov suab nrov cuam tshuam thiab ntxiv txhim kho kev tshawb nrhiav efficiency. Qhov kev ua tau zoo ntawm lub tshuab ntes no tsis yog tsuas yog cuam tshuam nrog nws cov yam ntxwv photoelectric, tab sis kuj muaj cov ntawv thov dav dav. Nrog nws txoj kev thaiv qhov tsaus nti tam sim no ntawm chav tsev kub thiab kev nqus tau zoo ntawm cov neeg nqa khoom photogenerated, qhov no photodetector yog qhov tshwj xeeb tshaj yog tsim nyog rau kev tshawb pom lub teeb pom kev tsis muaj zog hauv thaj chaw xws li kev saib xyuas ib puag ncig, kev soj ntsuam astronomical, thiab kev sib txuas lus kho qhov muag. Qhov kev tshawb fawb tau ua tiav no tsis tsuas yog muab cov tswv yim tshiab rau kev txhim kho cov khoom siv hluav taws xob tsawg-dimensional photodetectors, tab sis kuj muaj cov ntaub ntawv tshiab rau kev tshawb fawb yav tom ntej thiab kev txhim kho cov kev ua tau zoo thiab cov khoom siv hluav taws xob qis.