Uguqukoisixhobo sokubona ifoto sesilicon（Si photodetector）
Isixhobo sokubona ifoto esiguquguqukayo esine-silicon yonke（Isixhobo sokubona ifoto）, ukusebenza ngaphaya kwesiqhelo
Ngenxa yobunzima obukhulayo beemodeli zobukrelekrele bokwenziwa kunye neenethiwekhi ezinzulu ze-neural, amaqela eekhompyutha abeka iimfuno eziphezulu kunxibelelwano lwenethiwekhi phakathi kweeprosesa, imemori kunye nee-compute nodes. Nangona kunjalo, iinethiwekhi zemveli ze-on-chip kunye ne-inter-chip ezisekelwe kuqhagamshelo lombane azikwazanga ukuhlangabezana nesidingo esikhulayo se-bandwidth, i-latency kunye nokusetyenziswa kwamandla. Ukuze kusonjululwe le ngxaki, iteknoloji yokunxibelelana kwe-optical kunye nomgama wayo omde wokudlulisela, isantya esikhawulezayo, iingenelo eziphezulu zokusebenza kakuhle kwamandla, kancinci kancinci ziba lithemba lophuhliso lwexesha elizayo. Phakathi kwazo, iteknoloji ye-silicon photonic esekelwe kwinkqubo ye-CMOS ibonisa amandla amakhulu ngenxa yokuhlanganiswa kwayo okuphezulu, iindleko eziphantsi kunye nokuchaneka kokucubungula. Nangona kunjalo, ukufezekiswa kwee-photodetectors ezisebenzayo kakhulu kusajongene nemingeni emininzi. Ngokwesiqhelo, ii-photodetectors kufuneka zidibanise izixhobo ezine-band gap encinci, njenge-germanium (Ge), ukuphucula ukusebenza kokufumanisa, kodwa oku kukwakhokelela kwiinkqubo zokuvelisa ezinzima ngakumbi, iindleko eziphezulu, kunye nemveliso engaguqukiyo. Isixhobo sokubona iifoto esine-all-silicon esakhiwe liqela lophando sifikelele kwisantya sokudlulisa idatha se-160 Gb/s ngetshaneli nganye ngaphandle kokusebenzisa i-germanium, kunye ne-bandwidth iyonke yokudlulisa ye-1.28 Tb/s, ngoyilo olutsha lwe-dual-microring resonator.
Kutshanje, iqela elihlangeneyo lophando eMelika lipapashe uphando olutsha, libhengeza ukuba liphumelele ekuphuhliseni i-photodiode ye-avalanche ye-silicon yonke (Isixhobo sokubona ifoto se-APD) itshiphu. Le chip inomsebenzi we-photoelectric interface okhawulezayo kakhulu kwaye ingabizi kakhulu, okulindeleke ukuba ifikelele ngaphezulu kwe-3.2 Tb ngomzuzwana wokudluliselwa kwedatha kwiinethiwekhi ze-optical zexesha elizayo.
Impumelelo yobugcisa: uyilo lwe-resonator ye-microring ephindwe kabini
Ii-photodetector zemveli zihlala zinempikiswano engavumelaniyo phakathi kwe-bandwidth kunye nokuphendula. Iqela lophando liphumelele ekunciphiseni le mpikiswano ngokusebenzisa uyilo lwe-resonator olune-microring ezimbini kwaye layithintela ngempumelelo incoko phakathi kweetshaneli. Iziphumo zovavanyo zibonisa ukubaisixhobo sokubona iifoto se-silicon yonkeinempendulo ye-A ye-0.4 A/W, umsinga omnyama ophantsi njenge-1 nA, i-bandwidth ephezulu ye-40 GHz, kunye ne-crosstalk yombane ephantsi kakhulu engaphantsi kwe-−50 dB. Olu sebenzi luthelekiswa nee-photodetectors zorhwebo zangoku ezisekelwe kwi-silicon-germanium kunye ne-III-V materials.
Ukujonga kwixesha elizayo: Indlela eya ekuveliseni izinto ezintsha kwiinethiwekhi ze-optical
Uphuhliso oluphumeleleyo lwe-all-silicon photodetector aludlulanga nje isisombululo sendabuko kubuchwepheshe, kodwa lukwazuze ukonga malunga ne-40% kwixabiso, luvula indlela yokufezekisa iinethiwekhi ze-optical ezikhawulezayo nezingabizi kakhulu kwixesha elizayo. Le teknoloji ihambelana ngokupheleleyo neenkqubo ze-CMOS ezikhoyo, ine-veety ephezulu kakhulu kunye ne-veety, kwaye kulindeleke ukuba ibe yinxalenye eqhelekileyo kwicandelo letekhnoloji ye-silicon photonics kwixesha elizayo. Kwixesha elizayo, iqela lophando liceba ukuqhubeka nokwenza ngcono uyilo ukuze kuphuculwe ngakumbi izinga lokufunxwa kunye nokusebenza kwe-bandwidth ye-photodetector ngokunciphisa uxinano lwe-doping kunye nokuphucula iimeko zokufakelwa. Kwangaxeshanye, uphando luya kuphinda luhlolisise indlela le teknoloji ye-all-silicon enokusetyenziswa ngayo kwiinethiwekhi ze-optical kwiiqela ze-AI zesizukulwana esilandelayo ukuze kufezekiswe i-bandwidth ephezulu, ukwandiswa kunye nokusebenza kakuhle kwamandla.
Ixesha leposi: Matshi-31-2025