UMGAQO-NKQUBO NOKWENZA IXESHA LOKUGQIBELA

Umgaqo kunye nangoku imekoI-Avalanche Pempletetect (I-APD yefoto) Icandelo lesibini

2.2 Ubume be-chip ye-APD
Ulwakhiwo lwe-chiip elifanelekileyo sisiqinisekiso esisisiseko sezixhobo ezifanelekileyo zokusebenza. Uyilo lolwakhiwo lwe-APD ikakhulu luthathela ingqalelo ixesha le-RC rhoqo, i-hole ifakwe kwi-heterojunction, ixesha lokuhamba ngenqanawa ngengingqi Ukuphuhliswa kwesakhiwo sayo kushwankathelwe apha ngezantsi:

(1) Isakhiwo esisisiseko
Isakhiwo esilula se-APD sisekwe kwi-PIPINODE, ingingqi kunye ne-NOD igcinwe kakhulu, kunye nohlobo lwe-N okanye uhlobo lwe-N okanye i-N-HETE okanye i-PFART ye-Elesplares, ukuze ibone i-ametronition yefoto eyintloko. Kwizixhobo ze-InP ze-InP, kuba i-Ionsis yempembelelo yeHole i-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-I-Inglish I-Election I-Election I-English Countral Alls, Ingingqi yohlobo lwe-N-Chwethethwa igcinwe kwingingqi ye-P. Kwimeko efanelekileyo, imingxunya kuphela igcinwe kwingingqi yoncedo, ngenxa yoko le ndawo ibizwa ngokuba yindawo ethatyathwe yiHole.

(2) Ukufunxa kunye nokufumana kwahlulahlulwe
Ngenxa yeempawu ezixhaphakileyo ze-Inp (i-Inp yi-1.35ev kunye ne-Ingaas yi-0.75EV), i-InP idla ngokusetyenziswa njengezixhobo zenzuzo kunye ne-iNAAs njengezixhobo zokuzonwabisa.

(3) Ukufunxa, igradient kunye ne-inzuzo (i-SAGM) icetywayo
Okwangoku, uninzi lwezixhobo ze-APD zisebenzisa izixhobo ze-Inp / I-Ingaas, i-Ingaas njengendawo yokuthabatha, i-Inp phantsi kwendawo yombane ephezulu (> i-5x105v / cm) ngaphandle kwezinto zendawo yokufumana. Kule nto, uyilo lolo ye-APD kukuba inkqubo ye-Avalanche isenziwa kwi-N-Chwether i-NEP ngokungqubana kwemingxunya. Ukujonga umahluko omkhulu kwi-InP kunye ne-Insaas, umahluko wamandla o-0.4ev kwi-InP ye-InP ngaphambi kokufikelela kwi-InP ye-InP ngaphambi kokuba iphendule i-APD. Le ngxaki inokusonjululwa ngokongeza ungqimba lwenguqu phakathi kwezixhobo ezimbini.

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Ukwenzela ukuqhubeka nokusasazwa kwendawo yombane kwi-arser kunye nobeko lwengeniso, i-fanomer yaziswa kwi-COALFICATI uyilo, ephucula kakhulu isantya sefowuni kunye nokuphendula.

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Kuloyilo olufanelekileyo lwezologoso lwemveli, kufuneka sijongane nento yokuba ubukhulu bobunzima be-absurment yinto ephikisayo yesantya sesantya kunye nokusebenza kwexabiso. Ubungqingqwa obucekeceke bomaleko obuncinci bunokunciphisa ixesha lokuhamba ngenqwelomoya, ngoko ke i-bandwidth enkulu inokufunyanwa. Nangona kunjalo, kwangaxeshanye, ukuze bafumane ukusebenza kakuhle ubungakanani, umaleko wokufumana kufuneka ube nobungqingqwa obaneleyo. Isisombululo sale ngxaki sinokuba yindawo yokufumana i-Cavity (RCE), oko kukuthi, i-Bragg eQhelekileyo ye-Bragg (i-DBR) yenzelwe ezantsi nangaphezulu kwesixhobo. Isibuko se-DBB siqukethe iintlobo ezimbini zezinto ezinombala ophantsi kunye nesalathiso esiphakamileyo semozulu ngesakhiwo, kwaye ezo zibini zikhula ngokuthe tye, kwaye ezona zinto zimbini zikhula ngokuthe tye, kwaye ubukhulu bobungqingqwa bukhazima i-1/4 kwi-semicondcuctor. Ulwakhiwo loMgcini woMgcini lungahlangabezana neemfuno zesantya, ubukhulu becala lokubeleko lunokwenziwa buncinci, kwaye ukusebenza kwempumelelo kwe-elektroni kuyanda emva kokubonakala kwezinto ezininzi.

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Elinye isisombululo sokusombulula okuphikisayo kweziphumo ezahlukeneyo zobukhulu obukhulu kwizantya zefowuni kunye nokusebenza kwexabiso le-quam kukwazisa ubume be-EdgeGiide. Olu lwakhiwo lungena elona cala, kuba ungqimba lonyango mde kakhulu, kulula ukufumana izixhobo eziphezulu zexabiso, kwaye kwangaxeshanye, ungqimba lonyango lunokuthamba kakhulu, ukunciphisa ixesha lokuhamba ngenqwelomoya. Ke ngoko, le sakhiwo isombulula ukuxhomekeka okwahlukileyo kwebhendi kunye nokusebenza kakuhle kubungqingqwa bomaleko, kwaye kulindeleke ukuba kufezekiswe inqanaba eliphezulu kunye ne-APD ephezulu ye-APD. Inkqubo ye-WG-APD ilula kune-RCE APD, esusa inkqubo yokulungiselela i-DBRub. Ke ngoko, inokwenzeka kwicandelo elisebenzayo kwaye lilungele uqhagamshelo lwenqwelomoya.

3. Ukuqukumbela
Uphuhliso lweAvalancheifotoIzixhobo kunye nezixhobo ziphononongwa. I-Electron kunye neHole yeNgozi ye-Inp yezixhobo ze-InP zikufuphi nezo ze-Inalas, ezikhokelela kwinkqubo emibini yokuthwala, eyenza i-avalancy ixesha elide kwaye isandi senyuka. Xa kuthelekiswa nezixhobo ezimsulwa, i-ICAAS (P) / i-Istas kunye ne (Al) Gaas / i-Al) izakhiwo ze-quas ze-coyer, ke ukusebenza kwengxolo kunokubatshintshwa kakhulu. Ngokwemo yesakhiwo, i-stosotor iphucule (RCE) I-SAGCM kunye ne-EDGCM yeWagGiide (WG-APD) iphuhlisiwe ukuze kuconjululwe ukuphikisana kwezixhobo zesantya sokufumana isantya kunye nokusebenza kakuhle. Ngenxa yobunzima benkqubo, ukusetyenziswa ngokupheleleyo kwezi zinto zimbini kufuneka kuphononongwe kwakhona.