Kafukufuku Watsopano pa Low-dimensional Avalanche Photodetector

Kafukufuku Watsopano pa Low-dimensional Avalanche Photodetector

Kuzindikira kwapang'onopang'ono kwa matekinoloje a mafotoni ochepa kapena ngakhale mafotoni amodzi kumakhala ndi chiyembekezo chogwiritsa ntchito m'magawo monga kujambula kocheperako, kuzindikira kwakutali ndi telemetry, komanso kulumikizana kwachulukidwe. Pakati pawo, ma avalanche photodetectors (APD) akhala chitsogozo chofunikira pa kafukufuku wa chipangizo cha optoelectronic chifukwa cha kukula kwawo kochepa, kuyendetsa bwino kwambiri komanso kusakanikirana kosavuta. Chiŵerengero cha Signal-to-noise (SNR) ndi chizindikiro chofunikira cha APD Photodetector, chomwe chimafuna kupindula kwakukulu ndi kutsika kwamdima wakuda. Kafukufuku wokhudza magawo awiri a mbali ziwiri (2D) van der Waals heterojunctions akuwonetsa chiyembekezo chachikulu pakupanga ma APD ochita bwino kwambiri. Ofufuza ochokera ku China adasankha WSe₂ ya bipolar two-dimensional semiconductor material ngati chithunzithunzi ndikukonza bwino Pt/WSe₂/NiAPD Photodetectorndi ntchito yabwino yofananira kuti muthetse vuto la phokoso lachikhalidwe cha APD.

Ochita kafukufuku apereka lingaliro loyeneraPhotodetector ya avalanchekutengera kamangidwe ka Pt/WSe₂/Ni, kukwaniritsa kuzindikira kwamphamvu kwambiri kwa ma siginecha ofooka kwambiri pamlingo wa fW kutentha kwachipinda. Anasankha WSe₂ yamitundu iwiri ya semiconductor, yomwe ili ndi magetsi abwino kwambiri, ndikuyiphatikiza ndi Pt ndi Ni electrode zipangizo kuti apange bwino mtundu watsopano wa avalanche photodetector. Mwa kukhathamiritsa bwino ntchito yofananira pakati pa Pt, WSe₂ ndi Ni, njira yoyendera idapangidwa yomwe imatha kuletsa zonyamulira zakuda ndikulola kuti zonyamula zithunzi zidutse. Makinawa amachepetsa kwambiri phokoso lambiri lomwe limayambitsidwa ndi chonyamulira cha ionization, kupangitsa kuti chithunzithunzi chizitha kuzindikira ma siginecha owoneka bwino kwambiri pamaphokoso otsika kwambiri.

Kafukufukuyu akuwonetsa gawo lofunikira la uinjiniya wazinthu ndi kukhathamiritsa kwa mawonekedwe pakupititsa patsogolo magwiridwe antchito ama photodetectors. Kupyolera mu kupanga mwanzeru kwa maelekitirodi ndi zipangizo ziwiri-dimensional, chitetezo cha zonyamulira zamdima chinatheka, kuchepetsa kwambiri kusokoneza kwa phokoso ndikupititsa patsogolo kuzindikira. Magwiridwe a chowunikira ichi samangowoneka mu mawonekedwe ake azithunzi, komanso ali ndi chiyembekezo chogwiritsa ntchito. Ndi kutsekereza kwake kwamphamvu kwa mdima pa kutentha kwa chipinda komanso kuyamwa bwino kwa zonyamulira zojambulidwa ndi zithunzi, chithunzithunzichi ndichoyenera kuzindikira ma siginecha ofooka m'magawo monga kuyang'anira chilengedwe, kuyang'ana zakuthambo, ndi kulumikizana ndi kuwala. Kupambana kofufuza kumeneku sikumangopereka malingaliro atsopano opangira ma photodetectors otsika, komanso amapereka maumboni atsopano a kafukufuku wamtsogolo ndi chitukuko cha zipangizo zamakono zogwiritsira ntchito kwambiri komanso zotsika mphamvu za optoelectronic.