I-revolutionary silicon photodetector （Si photodetector）

Izinguqukoisitholi sesithombe se-silicon（Isitholi sesithombe）

I-revolutionary allo-silicon photodetector （Isitholi sezithombe）, ukusebenza okungaphezu kwendabuko

Njengoba kukhula ubunzima bamamodeli obuhlakani bokwenziwa kanye namanethiwekhi ajulile e-neural, amaqoqo ekhompyutha abeka izidingo eziphakeme ekuxhumaneni kwenethiwekhi phakathi kwama-processor, imemori kanye nama-compute node. Kodwa-ke, amanethiwekhi endabuko e-on-chip kanye ne-inter-chip asekelwe ekuxhumaneni kukagesi awakwazanga ukuhlangabezana nesidingo esikhulayo se-bandwidth, i-latency kanye nokusetshenziswa kwamandla. Ukuze kuxazululwe le nkinga, ubuchwepheshe bokuxhumana kwe-optical kanye nebanga labo elide lokudlulisa, isivinini esisheshayo, izinzuzo eziphezulu zokusebenza kahle kwamandla, kancane kancane baba ithemba lentuthuko yesikhathi esizayo. Phakathi kwabo, ubuchwepheshe be-silicon photonic obusekelwe enkambisweni ye-CMOS bubonisa amandla amakhulu ngenxa yokuhlanganiswa kwabo okuphezulu, izindleko eziphansi kanye nokunemba kokucubungula. Kodwa-ke, ukuqashelwa kwama-photodetector asebenza kahle kusabhekene nezinselele eziningi. Ngokuvamile, ama-photodetector adinga ukuhlanganisa izinto ezinegebe elincane lebhendi, njenge-germanium (Ge), ukuze kuthuthukiswe ukusebenza kokuthola, kodwa lokhu kuholela nasezinqubweni zokukhiqiza eziyinkimbinkimbi kakhulu, izindleko eziphakeme, kanye nemikhiqizo engaguquki. I-photodetector ene-silicon yonke eyakhiwe yithimba locwaningo ifinyelele isivinini sokudlulisa idatha esingu-160 Gb/s ngesiteshi ngasinye ngaphandle kokusebenzisa i-germanium, enomkhawulokudonsa wokudlulisa ophelele ongu-1.28 Tb/s, ngomklamo omusha we-dual-microring resonator.

Muva nje, ithimba elihlangene labacwaningi e-United States lishicilele ucwaningo olusha, limemezela ukuthi liphumelele ekwakheni i-photodiode ye-avalanche ye-silicon yonke (Isitholi sezithombe se-APD) i-chip. Le chip inomsebenzi we-photoelectric interface osheshayo kakhulu futhi ongabizi kakhulu, okulindeleke ukuthi ifinyelele ukudluliselwa kwedatha okungaphezu kuka-3.2 Tb ngomzuzwana kumanethiwekhi e-optical esikhathi esizayo.

Impumelelo yobuchwepheshe: umklamo we-resonator we-microring ephindwe kabili

Ama-photodetector endabuko avame ukuba nokuphikisana okungenakulungiswa phakathi kwe-bandwidth kanye nokuphendula. Ithimba locwaningo liphumelele ekunciphiseni lokhu kuphikisana ngokusebenzisa umklamo we-resonator we-double-microring futhi laqeda ngempumelelo ingxoxo phakathi kweziteshi. Imiphumela yokuhlola ikhombisa ukuthiisitholi sezithombe se-all-siliconinempendulo ye-A engu-0.4 A/W, ugesi omnyama ophansi njenge-1 nA, umkhawulokudonsa ophezulu we-40 GHz, kanye ne-crosstalk kagesi ephansi kakhulu engaphansi kwe-−50 dB. Lokhu kusebenza kufana nama-photodetector amanje ezentengiselwano asekelwe ezintweni ze-silicon-germanium kanye ne-III-V.

Ukubheka esikhathini esizayo: Indlela eya ekusunguleni amanethiwekhi okukhanya

Ukuthuthukiswa okuphumelelayo kwe-all-silicon photodetector akugcini nje ngokudlula ikhambi lendabuko kwezobuchwepheshe, kodwa futhi kwafeza ukonga okungama-40% ezindlekweni, kwavula indlela yokufezwa kwamanethiwekhi optical asheshayo futhi ashibhile esikhathini esizayo. Ubuchwepheshe buhambisana ngokugcwele nezinqubo ze-CMOS ezikhona, bunesivuno esikhulu kakhulu kanye nesivuno, futhi kulindeleke ukuthi bube yingxenye ejwayelekile emkhakheni wobuchwepheshe be-silicon photonics esikhathini esizayo. Esikhathini esizayo, ithimba locwaningo lihlela ukuqhubeka nokwenza ngcono umklamo ukuze kuthuthukiswe izinga lokumuncwa kanye nokusebenza kwe-bandwidth ye-photodetector ngokunciphisa amazinga e-doping kanye nokuthuthukisa izimo zokufakelwa. Ngesikhathi esifanayo, ucwaningo luzohlola nokuthi lobu buchwepheshe be-all-silicon bungasetshenziswa kanjani kumanethiwekhi optical kumaqoqo e-AI esizukulwane esilandelayo ukuze kufezwe i-bandwidth ephezulu, ukusabalalisa kanye nokusebenza kahle kwamandla.