Ama-photodetectors anesivinini esiphezulu aqalwa yi-InGaAs photodetectors

Ama-photodetectors esivinini esikhulu aqaliswa nguAma-photodetectors e-InGaAs

Ama-photodetectors anesivinini esikhuluemkhakheni wokuxhumana optical ikakhulukazi ihlanganisa i-III-V InGaAs photodetectors kanye ne-IV egcwele i-Si ne-Ge/Ama-photodetectors. Owokuqala wumtshina wendabuko oseduze ne-infrared, osekunesikhathi eside ubusa, kanti wona uncike kubuchwepheshe be-silicon optical ukuze ube inkanyezi ekhulayo, futhi uyindawo eshisayo emkhakheni wocwaningo lwe-optoelectronics lwamazwe ngamazwe eminyakeni yamuva nje. Ngaphezu kwalokho, ama-detectors amasha asekelwe ku-perovskite, izinto eziphilayo kanye ne-two-dimensional zikhula ngokushesha ngenxa yezinzuzo zokucubungula kalula, ukuguquguquka okuhle kanye nezakhiwo eziguqulekayo. Kunomehluko omkhulu phakathi kwalezi zitholi ezintsha kanye nezithonjana zendabuko ezingaphili ezimpahleni ezibonakalayo nasezinqubweni zokukhiqiza. I-Perovskite detectors inezici ezinhle kakhulu zokumunca ukukhanya kanye namandla okuthutha okushaja asebenzayo, izitholi zezinto eziphilayo zisetshenziswa kabanzi ngezindleko zazo eziphansi kanye nama-electron aguquguqukayo, futhi izitholi zezinto ezinobukhulu obubili zidonsele ukunaka okukhulu ngenxa yezakhiwo zazo eziyingqayizivele zomzimba kanye nokuhamba okuphezulu kwenkampani yenethiwekhi. Kodwa-ke, uma kuqhathaniswa nama-InGaAs kanye ne-Si/Ge detectors, izithonjana ezintsha zisadinga ukuthuthukiswa mayelana nokuzinza kwesikhathi eside, ukuvuthwa kokukhiqiza kanye nokuhlanganiswa.

I-InGaAs ingenye yezinto ezifanele zokubona i-photodetectors yejubane eliphezulu nezimpendulo eziphezulu. Okokuqala nje, i-InGaAs iyinto eqondile ye-bandgap semiconductor, futhi ububanzi bayo be-bandgap bungalawulwa ngesilinganiso phakathi kwe-In ne-Ga ukuze kuzuzwe ukutholwa kwamasignali okubona amaza ahlukene. Phakathi kwazo, i-In0.53Ga0.47A ihambisana ngokuphelele ne-substrate lattice ye-InP, futhi ine-coefficient enkulu yokumunca ukukhanya ebhendini yokuxhumana ebonakalayo, esetshenziswa kabanzi ekulungiseleleniama-photodetectors, kanye nokusebenza kwamanje okumnyama nokuphendula nakho kungcono kakhulu. Okwesibili, i-InGaAs kanye nezinto ze-InP zombili zinesivinini esiphezulu se-electron drift, futhi isivinini sazo se-electron drift esigcwele sicishe sibe ngu-1×107 cm/s. Ngesikhathi esifanayo, izinto ze-InGaAs ne-InP zinomphumela we-electron velocity overshoot ngaphansi kwenkambu ethile kagesi. Isivinini se-overshoot singahlukaniswa sibe ngu-4× 107cm/s kanye no-6×107cm/s, okulungele ukuqaphela umkhawulokudonsa okhawulelwe wenkampani yenethiwekhi okhawulelwe isikhathi. Njengamanje, i-InGaAs photodetector iyisitholi sesithombe esijwayelekile kakhulu sokuxhumana ngokubona, futhi indlela yokuhlanganisa izehlakalo ezingaphezulu isetshenziswa kakhulu emakethe, kanye nemikhiqizo yokuhlonza izehlakalo yangaphezulu engu-25 Gbaud/s kanye ne-56 Gbaud/s seyenziwe. Usayizi omncane, izehlakalo zasemuva kanye nezitholi ezinkulu ze-bandwidth surface surface nazo zakhiwe, ezifanele kakhulu izinhlelo zokusebenza zejubane eliphezulu kanye nokugcwala okuphezulu. Kodwa-ke, i-surface probe yesigameko inqunyelwe imodi yayo yokuhlanganisa futhi kunzima ukuyihlanganisa namanye amadivaysi e-optoelectronic. Ngakho-ke, ngokuthuthukiswa kwezidingo zokuhlanganisa i-optoelectronic, ama-waveguide ahlanganiswe ne-InGaAs photodetectors asebenza kahle kakhulu futhi alungele ukuhlanganiswa kancane kancane aphenduke into egxile kakhulu ocwaningweni, phakathi kwawo amamojula we-photoprobe angu-70 GHz kanye ne-110 GHz InGaAs cishe wonke asebenzisa izakhiwo ezihlanganisiwe ze-waveguide. Ngokwezinto ezihlukile ze-substrate, i-waveguide ehlanganisa i-InGaAs photoelectric probe ingahlukaniswa izigaba ezimbili: i-InP ne-Si. Impahla ye-epitaxial ku-substrate ye-InP inekhwalithi ephezulu futhi ifaneleka kakhulu ukulungiswa kwamadivayisi asebenza kahle kakhulu. Kodwa-ke, ukungafani okuhlukahlukene phakathi kwezinto ze-III-V, izinto ze-InGaAs nama-substrates e-Si akhuliswe noma ahlanganiswe kuma-substrates e-Si aholela ezintweni eziphansi noma ikhwalithi yesixhumi esibonakalayo, futhi ukusebenza kwedivayisi kusenegumbi elikhulu lokuthuthukiswa.