Chosawoneka: kapangidwe kake ndi mfundo yogwira ntchito ya Avalte Photodtector (Photodtector) Amayambitsidwa, kusinthika kwa chisinthiko cha kapangidwe ka chipangizocho kumapendetsedwa, mawonekedwe a kafukufuku akupezeka mwachidule, ndipo m'tsogolo kukula kwa apd kumaphunziridwanso.
1. Kuyamba
Photodtector ndi chipangizo chomwe chimatembenuza chizindikiro pamagetsi. MuSemiconducy Photodtector. Ngakhale pakumvera kwakukulu, pini ya Photodiode imangotulutsa awiri elekitron-holers ambiri, yomwe ndi chida chopanda phindu lamkati. Kulabadira kwakukulu, a Aconanche Photodide (APD) angagwiritsidwe ntchito. The Welmufications of APD pa Photoocment imakhazikika pamavuto ogwiritsira ntchito mankhwalawa. Panthawi zina, mabowo othamanga ndi mabowo amatha kupeza mphamvu zokwanira kugundana ndi chitolirocho kuti apange awiri elekitron-bowo. Njirayi ndi mmodzi mwazomwe zimachitika, kuti awiri a elekitron-hole, omwe amapangidwa ndi matope owala amatha kutulutsa zigawo zingapo zamagetsi - bowo Chifukwa chake, acd ali ndi kutaya mtima kwambiri komanso phindu lamkati, lomwe limapangitsa chiwerengero cha chizindikiritso cha chipangizocho. Apd amagwiritsidwa ntchito makamaka mtunda wautali kapena wocheperako zithunzi zamitundu yocheperako yokhala ndi zofooka zina zovomerezeka. Pakadali pano, akatswiri ambiri owoneka bwino ali ndi chiyembekezo champhamvu kwambiri pa zomwe acki, ndikukhulupirira kuti kafukufuku wa acki ndikofunikira kukulitsa mpikisano wapadziko lonse lapansi wa minda yogwirizana.
2. Kukula kwa ukadauloChithunzithunzi cha Avalche(APD Photodtector)
Zipangizo za 2.1
(1)SI Photodtector
Ukadaulo wamakono ndiukadaulo wokhwima womwe umagwiritsidwa ntchito kwambiri mu gawo la microectronics, koma sioyenera kukonzekera zida mu funde la a Holwength Milly.
(2) Ge
Ngakhale kuyankha kowoneka bwino kwa Ged ndi koyenera kwa zofuna zotayika pang'ono ndi kufatsa pang'ono pakutumiza finic fir, pali zovuta zambiri pakukonzekera. Kuphatikiza apo, Gir Electron ndi Houd Voition Ruide ili pafupi () 1, chifukwa ndizovuta kukonzekera zida zapamwamba zaluso.
(3) in0.59GA0.47AS / INP
Ndi njira yabwino yosankhira mu0.55GA0.47AS monga kuwunika kopepuka kwa acd ndi inp monga ochulukitsa. Mayamwidwe a mu0.59GArA0.47as, 1.31mm, 1.55mm-1-1
(4)Ingas Photodtector/ Muchithunzi
Posankha inghasp ngati kuwala komwe kumatenga kusanjikiza ndi inp monga ochulukitsa osanjikiza, chidwi choyankha cha 1-1.4mm, phindu lapamwamba kwambiri komanso lalitali lomwe lingakhale labwino. Posankha zigawo zingapo, magwiridwe antchito abwino kwambiri amapezeka.
(5) ingaas / isalas
Mu0.52al0.48as zinthu zili ndi gawo la band (1.47EV) ndipo silimamwa pazinthu zam'madzi za 1.55mm. Pali umboni wowonda mu0.52al0.48as epithexial wosanjikiza amatha kupeza bwino kuposa momwe ulalo umasanjikira jakisoni wamagetsi.
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Kuchuluka kwa zinthu zamagetsi ndi chinthu chofunikira chokhudza magwiridwe antchito a acd. Zotsatira zake zikuwonetsa kuti kugunda kwa mankhwala ochulukirapo kumatha kusintha ndikuwonetsa ingnaas (p) / iTalas ndi in (Al) zojambula zapamwamba za Gaas. Pogwiritsa ntchito kapangidwe kazinthu zapamwamba kwambiri, uvinjiniya uja umatha kuwongolera molingana ndi asymmetric banleansinatiom pakati pa gulu la Collioker pakati pa gulu lokhala ndi ma valent band omwe dilence banks (ΔEV). Poyerekeza ndi zida zochuluka kwambiri, inghaas / isalas qualam malo electron inoition (a) imachulukirachulukira, ndipo ma elekitironi ndi mabowo amapeza mphamvu zowonjezera. Chifukwa cha δec >> δev, titha kuyembekeza kuti mphamvu zomwe ma electron zimawonjezera chiwongola dzanja chochulukirapo kuposa momwe hole imagwera (b). Chiwerengero (k) cha electron inotion kuti dzenje lizimitsidwa limachuluka. Chifukwa chake, zopangidwa kwambiri ndi bandwidth zopangidwa (GBW) ndi phokoso zochepa zimatha kupezeka pogwiritsa ntchito zida zapamwamba. Komabe, isas / isas Quedum bwino apd, yomwe imatha kuwonjezera K Mtengo wa Km, ndizovuta kugwiritsira ntchito olandila. Izi ndichifukwa choti chochuluka chomwe chimakhudza kuyankha kwakukulu kumangokhala kochepa ndi njira yakuda, osati phokoso lochulukitsa. Mu kapangidwe kameneka, zamakono zakuda zimachitika makamaka chifukwa chobwezeretsanso bwino kwambiri ndi gulu lopapatiza, kotero ngati inghaasp kapena inggaas, mmalo mwa thumba la bwino lomwe lingathetse bwino.
Post Nthawi: Nov-13-2023