Ucwaningo olusha mayelana nokuncane kakhuluIsitholi sezithombe se-InGaAs
Ukuthuthuka kobuchwepheshe bokuthwebula izithombe ze-infrared yamaza amafushane (i-SWIR) kube negalelo elikhulu ezinhlelweni zokubona ebusuku, ukuhlolwa kwezimboni, ucwaningo lwesayensi, kanye nokuvikelwa kokuphepha kanye neminye imikhakha. Njengoba isidingo sokutholwa sikhula ngale kokukhanya okubonakalayo, ukuthuthukiswa kwezinzwa zesithombe ze-infrared zamaza amafushane nakho kuyanda njalo. Kodwa-ke, ukufeza isixazululo esiphezulu nomsindo ophansi.isitholi sesithombe esibanziisabhekene nezinselele eziningi zobuchwepheshe. Nakuba i-InGaAs short-wave infrared photodetector yendabuko ingabonisa ukusebenza kahle kokuguqulwa kwe-photoelectric kanye nokuhamba kwe-carrier, kukhona ukuphikisana okuyisisekelo phakathi kwezinkomba zokusebenza eziyinhloko kanye nesakhiwo sedivayisi. Ukuze uthole ukusebenza kahle kwe-quantum (QE) okuphezulu, imiklamo evamile idinga ungqimba lokumunca (AL) lwama-micrometer angu-3 noma ngaphezulu, futhi lo mklamo wesakhiwo uholela ezinkingeni ezahlukahlukene.
Ukuze kuncishiswe ukujiya kwesendlalelo sokumunca (TAL) ku-InGaAs short-wave infraredumshini wokuthola izithombe, ukunxephezela ukwehla kokumuncwa kuma-wavelength amade kubalulekile, ikakhulukazi lapho ukujiya kwengqimba yokumuncwa kwendawo encane kuholela ekumuncweni okunganele ebangeni lobude be-wavelength. Isibalo 1a sibonisa indlela yokunxephezela ukujiya kwengqimba yokumuncwa kwendawo encane ngokwandisa indlela yokumuncwa kwe-optical. Lolu cwaningo luthuthukisa ukusebenza kahle kwe-quantum (QE) kubhendi ye-infrared yamagagasi amafushane ngokwethula isakhiwo se-TiOx/Au-based guided mode resonance (GMR) ohlangothini olungemuva lwedivayisi.
Uma kuqhathaniswa nezakhiwo zendabuko zokubonakaliswa kwensimbi ezihleliwe, isakhiwo se-resonance semodi eqondiswayo singakhiqiza imiphumela eminingi yokumuncwa kwe-resonance, okuthuthukisa kakhulu ukusebenza kahle kokumuncwa kokukhanya kwe-long-wavelength. Abacwaningi bathuthukise ukwakheka kwepharamitha ebalulekile yesakhiwo se-resonance semodi eqondiswayo, okuhlanganisa isikhathi, ukwakheka kwezinto, kanye ne-filling factor, ngendlela ye-strigorid coupled-wave analysis (RCWA). Ngenxa yalokho, le divayisi isagcina ukumuncwa okuphumelelayo ku-short-wave infrared band. Ngokusebenzisa izinzuzo zezinto ze-InGaAs, abacwaningi baphinde bahlola impendulo ye-spectral kuye ngesakhiwo se-substrate. Ukwehla kobukhulu besendlalelo sokumuncwa kufanele kuhambisane nokwehla kwe-EQE.
Ekuphetheni, lolu cwaningo luphumelele ukuthuthukisa i-InGaAs detector enobukhulu obungama-micrometer angu-0.98 kuphela, obuncane ngokuphindwe izikhathi ezingu-2.5 kunesakhiwo sendabuko. Ngesikhathi esifanayo, igcina ukusebenza kahle kwe-quantum okungaphezu kuka-70% ebangeni lobude be-wavelength obungu-400-1700 nm. Impumelelo ye-InGaAs photodetector encane kakhulu inikeza indlela entsha yobuchwepheshe yokuthuthukiswa kwezinzwa zesithombe ezine-spectrum ebanzi enesinqumo esiphezulu, enomsindo ophansi. Isikhathi sokuthutha esisheshayo esilethwa ukwakheka kwesakhiwo esincane kakhulu kulindeleke ukuthi sinciphise kakhulu i-crosstalk kagesi futhi sithuthukise izici zokuphendula zedivayisi. Ngesikhathi esifanayo, isakhiwo sedivayisi esincishisiwe sifaneleka kakhulu ubuchwepheshe bokuhlanganisa obune-chip eyodwa enezinhlangothi ezintathu (M3D), sibeka isisekelo sokufeza ama-pixel array aphezulu.
Isikhathi sokuthunyelwe: Feb-24-2026