Isantya esiphezulu se-photodetectors saziswa yi-InGaAs photodetectors

Isantya esiphezulu photodetectors yaziswa yiIifoto ze-InGaAs

Iifoto zokukhangela isantya esiphezulukwinkalo yonxibelelwano lwamehlo ikakhulu ibandakanya ii-III-V InGaAs photodetectors kunye ne-IV epheleleyo yeSi kunye neGe/Sizii-photodetectors. Eyangaphambili sisixhobo semveli esikufuphi ne-infrared, ebesilawula ixesha elide, ngelixa le yokugqibela ixhomekeke kwitekhnoloji ye-silicon optical ukuba ibe yinkwenkwezi ekhulayo, kwaye yindawo eshushu kuphando lwe-optoelectronics lwamazwe ngamazwe kwiminyaka yakutshanje. Ukongezelela, ii-detectors ezintsha ezisekelwe kwi-perovskite, izinto eziphilayo kunye ne-dimensional-dimensional materials zikhula ngokukhawuleza ngenxa yeenzuzo zokucutshungulwa lula, ukuguquguquka okuhle kunye neepropati ezithintekayo. Kukho umahluko obalulekileyo phakathi kwezi zichongi zitsha kunye neefoto zemveli ezingaphiliyo kwiipropathi zezinto kunye neenkqubo zokwenza. I-Perovskite detectors ineempawu ezibalaseleyo zokufunxa ukukhanya kunye nomthamo ochanekileyo wokuthutha, izixhobo ze-organic material detectors zisetyenziswa ngokubanzi kwiindleko zabo eziphantsi kunye nee-electron eziguquguqukayo, kunye ne-dimensional-dimensional materials detectors ziye zatsala ingqalelo enkulu ngenxa yeempawu zabo ezizodwa kunye nokuhamba okuphezulu kwe-carrier carrier. Nangona kunjalo, xa kuthelekiswa ne-InGaAs kunye ne-Si / Ge detectors, ii-detectors ezintsha zisafuna ukuphuculwa ngokwemiqathango yozinzo lwexesha elide, ukuvuthwa kokuvelisa kunye nokudibanisa.

I-InGaAs yenye yezixhobo ezifanelekileyo zokuqonda isantya esiphezulu kunye neempendulo eziphezulu zeefotodetectors. Okokuqala, i-InGaAs yimpahla ye-semiconductor ye-bandgap ethe ngqo, kwaye ububanzi bayo be-bandgap bunokulawulwa ngumlinganiselo phakathi kwe-In kunye ne-Ga ukufezekisa ukufunyanwa kwezibonakaliso ze-optical ze-wavelengths ezahlukeneyo. Phakathi kwazo, i-In0.53Ga0.47As ihambelana ngokugqibeleleyo ne-substrate lattice ye-InP, kwaye ine-coefficient yokukhanya okukhulu kwi-optical communication band, eyona isetyenziswa kakhulu ekulungiseleleni.ii-photodetectors, kunye nokusebenza okumnyama kwangoku kunye nokuphendula nazo zingcono kakhulu. Okwesibini, i-InGaAs kunye nezixhobo ze-InP zombini zinesantya esiphezulu se-electron drift, kwaye isantya se-electron drift saturated simalunga ne-1 × 107 cm/s. Ngexesha elifanayo, i-InGaAs kunye ne-InP izixhobo zineempembelelo ze-electron velocity overshoot phantsi kwendawo ethile yombane. I-overshoot velocity inokwahlulwa ibe yi-4 × 107cm / s kunye ne-6 × 107cm / s, ehambelana nokuqonda i-bandwidth enkulu ye-carrier-limited bandwidth. Okwangoku, i-InGaAs i-photodetector yeyona nto iphambili ye-photodetector yokunxibelelana kwe-optical, kwaye indlela yokudibanisa i-surface incipence isetyenziswa kakhulu kwimarike, kwaye i-25 Gbaud / s kunye ne-56 Gbaud / s imveliso ye-surface detector ifunyenwe. Ubungakanani obuncinci, izehlo zangasemva kunye nezixhobo zokujonga umphezulu we-bandwidth enkulu nazo ziphuhlisiwe, ezilungele ikakhulu isantya esiphezulu kunye nezicelo zokugcwala okuphezulu. Nangona kunjalo, i-probe yesiganeko somphezulu inqunyelwe yimowudi yokudibanisa kwaye kunzima ukudibanisa nezinye izixhobo ze-optoelectronic. Ke ngoko, ngokuphuculwa kweemfuno zokudityaniswa kwe-optoelectronic, i-waveguide edityaniswe ne-InGaAs photodetectors esebenza ngokugqwesileyo kwaye ilungele ukudityaniswa ngokuthe ngcembe ibe yinto ekugxilwe kuyo kuphando, phakathi kwayo imodyuli ye-70 GHz kunye ne-110 GHz InGaAs photoprobe phantse zonke zisebenzisa izakhiwo ezidityanisiweyo zamaza. Ngokwezixhobo ezahlukeneyo ze-substrate, i-waveguide edibanisa i-InGaAs photoelectric probe inokwahlulwa ibe ngamacandelo amabini: i-InP kunye ne-Si. Izinto ze-epitaxial kwi-substrate ye-InP inomgangatho ophezulu kwaye ifaneleke ngakumbi ukulungiswa kwezixhobo zokusebenza eziphezulu. Nangona kunjalo, ukungafani okwahlukeneyo phakathi kwemathiriyeli ye-III-V, imathiriyeli ye-InGaAs kunye nee-substrates ze-Si ezikhuliswe okanye ezibotshelelwe kwii-substrates ze-Si zikhokelela kwizinto ezihlwempuzekileyo okanye umgangatho wojongano, kunye nokusebenza kwesixhobo kusenegumbi elikhulu lokuphucula.