Paepae iti o te pūwero wheropūoko whakaahua horonga
Ko te pūoko whakaahua mō te horonga whero-whero (Pūoko whakaahua APD) he akomanga ongā taputapu whakaahua-hiko haurua-hauruae hua ake ai te hua nui mā te pānga ionization tukinga, kia tutuki ai te kaha ki te kite i ētahi photon, i ngā photon takitahi rānei. Heoi, i roto i ngā hanganga photodetector APD tikanga, ka hua ake te tukanga marara kawe kore-taurite ki te ngaronga pūngao, ā, me eke te ngaohiko paepae horonga ki te 50-200 V. Ka nui ake ngā tono mō te ngaohiko taraiwa o te taputapu me te hoahoa ara iahiko pānui, ka piki ake ngā utu, ka whakawhāiti hoki i ngā tono whānui.
Nō nā tata nei, kua whakaarohia e ngā rangahau Hainamana tētahi hanganga hou o te pūoko tata-whero-ā-rangi me te iti o te ngaohiko paepae-ā-rangi me te tino aro. I runga i te hononga-whaiaro o te paparanga ngota, ka whakatauhia e te pūoko whakaahua-ā-rangi te marara kino i puta mai i te āhua hapa atanga e kore e taea te karo i roto i te hononga-whakawhiti. I taua wā, ka whakamahia te mara hiko "tihi" kaha o te rohe i puta mai i te pakaru o te taurite whakawhiti hei whakarei ake i te taunekeneke coulomb i waenga i ngā kaikawe, hei pehi i te marara aratau phonon waho-papa, me te whakatutuki i te whai huatanga takirua teitei o ngā kaikawe kore-taurite. I te pāmahana rūma, e tata ana te kaha paepae ki te rohe ariā Eg (ko Eg te āputa roopu o te semiconductor) ā, ko te aro o te pūoko kitenga o te pūoko avalanche infrared e tae atu ana ki te taumata photon 10000.
Ko tēnei rangahau e hangai ana ki te hononga honohono ā-roto o te tungsten diselenide (WSe₂) (chalcogenide whakarewa whakawhiti rua-ahu, TMD) hei reo whakanui mō ngā horonga kaikawe utu. Ka tutuki te pakaru o te taurite whakawhiti ā-wāhi mā te hoahoa i tētahi whakarerekētanga taumata topography hei whakaoho i tētahi mara hiko "piko" kaha ā-rohe i te atanga hononga honohono kua whakarerekētia.
Hei tāpiritanga, ka taea e te matotoru ngota te pehi i te tikanga marara e whakahaerehia ana e te aratau phonon, me te whakatutuki i te tukanga whakaterenga me te whakarea o te kawe kore-taurite me te iti rawa o te mate. Mā tēnei ka tata te kaha o te paepae horonga i te pāmahana rūma ki te rohe ariā arā, te āputa roopu rauemi semiconductor Hei tauira. I whakaitihia te ngaohiko paepae horonga mai i te 50 V ki te 1.6 V, e āhei ai ngā kairangahau ki te whakamahi i ngā ara iahiko matihiko iti-ngaohiko pakeke hei akiaki i te horonga.pūoko whakaahuatae atu ki ngā diode taraiwa me ngā transistors. E whakatinanahia ana e tēnei rangahau te huringa whai hua me te whakamahinga o te pūngao kawe kore-taurite mā te hoahoa i te pānga whakareatanga horonga iti, e whakarato ana i tētahi tirohanga hou mō te whanaketanga o te whakatupuranga e whai ake nei o te hangarau kimi i te whero whero tino tairongo, iti te paepae me te nui o te whiwhinga.
Wā tuku: 16 Paenga-whāwhā 2025