Binciken da aka yi kwanan nan game da na'urar gano ambaliyar ruwa ta Avalanche Photodetector

Binciken da aka yi kwanan nan nana'urar gano ambaliyar ruwa

Ana amfani da fasahar gano infrared sosai a fannin binciken sojoji, sa ido kan muhalli, gano cutar a fannin likitanci da sauran fannoni. Na'urorin gano infrared na gargajiya suna da wasu iyakoki a cikin aiki, kamar su fahimtar gano cutar, saurin amsawa da sauransu. Kayan InAs/InAsSb Class II superlattice (T2SL) suna da kyawawan halaye na photoelectric da kuma iya canzawa, wanda hakan ya sa suka dace da na'urorin gano infrared na dogon zango (LWIR). Matsalar raunin amsawa a cikin gano infrared na dogon zango ya kasance abin damuwa na dogon lokaci, wanda hakan ke takaita ingancin aikace-aikacen na'urorin lantarki sosai. Kodayake na'urar gano infrared na avalanche (na'urar gano hoto ta APD) yana da kyakkyawan aikin amsawa, yana fama da matsanancin kwararar ruwa mai duhu yayin ninkawa.

Domin magance waɗannan matsalolin, wata ƙungiya daga Jami'ar Kimiyyar Lantarki da Fasaha ta China ta yi nasarar tsara wani babban ƙarfin aiki na Class II superlattice (T2SL) mai ɗaukar hoto ... A cikin mahallin gano infrared mai tsayi, don cimma irin wannan tsayin daka na yankewa kamar InAs/GaSb T2SL, ana buƙatar lokaci ɗaya mai kauri na InAs/InAsSb T2SL. Duk da haka, monocycle mai kauri yana haifar da raguwar ma'aunin sha a cikin alkiblar girma da kuma ƙaruwar tasirin ramuka a cikin T2SL. An gano cewa ƙara ɓangaren Sb zai iya cimma tsayin daka na yankewa ba tare da ƙara kauri na lokaci ɗaya ba. Duk da haka, yawan abun ciki na Sb na iya haifar da rabuwar abubuwan Sb.

Saboda haka, an zaɓi InAs/InAs0.5Sb0.5 T2SL tare da rukunin Sb 0.5 a matsayin Layer mai aiki na APDna'urar gano hoto. InAs/InAsSb T2SL galibi yana girma ne akan abubuwan GaSb, don haka ya kamata a yi la'akari da rawar da GaSb ke takawa wajen sarrafa nau'in. Ainihin, cimma daidaiton nau'in ya ƙunshi kwatanta matsakaicin ma'aunin lattice na wani superlattice na tsawon lokaci ɗaya da ma'aunin lattice na substrate. Gabaɗaya, nau'in tensile a cikin InAs ana rama shi ta hanyar matsi da InAsSb ya gabatar, wanda ke haifar da kauri Layer InAs fiye da Layer InAsSb. Wannan binciken ya auna halayen amsawar photoelectric na mai gano nau'in avalanche, gami da amsawar spectral, hasken rana mai duhu, hayaniya, da sauransu, kuma ya tabbatar da ingancin ƙirar Layer gradient mai matakai. An yi nazarin tasirin ninka ruwan sama na mai gano nau'in avalanche, kuma an tattauna alaƙar da ke tsakanin ma'aunin ninkawa da ƙarfin hasken da ya faru, zafin jiki da sauran sigogi.

HOTO NA (A) Zane-zanen tsarin InAs/InAsSb mai tsawon zangon infrared APD photodetector; (B) Zane-zanen tsarin filayen lantarki a kowane Layer na APD photodetector.