Kafukufuku watsopano pa chowunikira zithunzi cha InGaAs choonda kwambiri

Kafukufuku watsopano pa zoonda kwambiriChowunikira zithunzi cha InGaAs
Kupita patsogolo kwa ukadaulo wa zithunzi za infrared (SWIR) kwathandiza kwambiri pakuwona usiku, kuyang'anira mafakitale, kafukufuku wa sayansi, ndi chitetezo ndi madera ena. Chifukwa cha kufunikira kwakukulu kwa kuzindikirika kupitirira kuwala kowoneka, chitukuko cha masensa a zithunzi za infrared a short-wave chikuwonjezekanso nthawi zonse. Komabe, kukwaniritsa mawonekedwe apamwamba komanso phokoso lochepa.chowunikira zithunzi cha ma spectrum ambiriikadali ndi mavuto ambiri aukadaulo. Ngakhale kuti chojambulira zithunzi cha InGaAs cha mafunde afupiafupi chimatha kuwonetsa bwino kwambiri kusintha kwa ma photoelectric komanso kuyenda kwa carrier, pali kutsutsana kwakukulu pakati pa zizindikiro zawo zazikulu zogwirira ntchito ndi kapangidwe ka chipangizocho. Kuti mupeze mphamvu yapamwamba ya quantum (QE), mapangidwe achikhalidwe amafunikira gawo loyamwa (AL) la ma micrometer atatu kapena kuposerapo, ndipo kapangidwe kameneka kamabweretsa mavuto osiyanasiyana.
Pofuna kuchepetsa makulidwe a absorption layer (TAL) mu InGaAs short-wave infraredchowunikira zithunzi, kulipira kuchepetsa kuyamwa kwa mafunde aatali ndikofunikira kwambiri, makamaka pamene makulidwe a gawo laling'ono la kuyamwa kwa magetsi amapangitsa kuti kuyamwa kusakwanire mu utali wa mafunde aatali. Chithunzi 1a chikuwonetsa njira yolipira makulidwe a gawo laling'ono la kuyamwa kwa magetsi mwa kukulitsa njira yoyamwa ya kuwala. Kafukufukuyu akuwonjezera mphamvu ya quantum (QE) mu gulu la infrared la mafunde afupi poyambitsa kapangidwe ka TiOx/Au-based guided mode resonance (GMR) kumbuyo kwa chipangizocho.

Poyerekeza ndi kapangidwe ka planar metal reflection, kapangidwe ka guided mode resonance kangathe kupanga ma resonance absorption ambiri, zomwe zimapangitsa kuti kuwala kwa kutalika kwa mafunde kukhale kogwira mtima kwambiri. Ofufuza adakonza kapangidwe ka key parameter ka kapangidwe ka guided mode resonance, kuphatikizapo nthawi, kapangidwe ka zinthu, ndi filling factor, kudzera mu njira ya rigortic coupled-wave analysis (RCWA). Zotsatira zake, chipangizochi chimasungabe ma absorption abwino mu short-wave infrared band. Pogwiritsa ntchito ubwino wa zinthu za InGaAs, ofufuzawo adafufuzanso momwe ma spectral response amagwirira ntchito kutengera kapangidwe ka substrate. Kuchepa kwa makulidwe a absorption layer kuyenera kutsagana ndi kuchepa kwa EQE.
Pomaliza, kafukufukuyu adapanga bwino chowunikira cha InGaAs chokhala ndi makulidwe a ma micrometer 0.98 okha, chomwe ndi chopyapyala kuposa kapangidwe kakale kopitilira 2.5. Nthawi yomweyo, chimasunga mphamvu ya quantum yoposa 70% mu utali wa wavelength wa 400-1700 nm. Kupambana kwa chowunikira cha InGaAs chopyapyala kwambiri kumapereka njira yatsopano yaukadaulo yopangira masensa azithunzi okhala ndi phokoso lotsika komanso lopanda phokoso. Nthawi yofulumira yonyamula chonyamulira yomwe imabweretsedwa ndi kapangidwe ka kapangidwe kowonda kwambiri ikuyembekezeka kuchepetsa kwambiri crosstalk yamagetsi ndikuwongolera mawonekedwe a yankho la chipangizocho. Nthawi yomweyo, kapangidwe ka chipangizocho kochepetsedwa ndikoyenera kwambiri ukadaulo wophatikiza wa single-chip three-dimensional (M3D), ndikuyika maziko opezera ma pixel a high-density arrays.