Āhua-rua-ruapūoko whakaahua horonga
Ko te pūoko whakaahua āwhata rua-ahu rua (Pūoko whakaahua APD) ka tutuki i te haruru tino iti me te kitea te tairongo teitei
He nui ngā tūmanakohanga mō te kimi i ngā photon iti, tae atu ki ngā photon takitahi, ki te kimi i ngā photon takitahi, ki ngā mara pēnei i te whakaahua mārama ngoikore, te mātakitaki mamao me te telemetry, me te whakawhitiwhiti kōrero irahiko. I roto i ēnei, kua noho te taputapu kimi whakaahua avalanche (APD) hei huarahi nui i roto i te mara rangahau taputapu optoelectronic nā ōna āhuatanga o te rahi iti, te whai huatanga teitei me te ngāwari o te whakauru. Ko te ōwehenga tohu-ki-haruru (SNR) he tohu nui o te taputapu kimi whakaahua APD, e hiahia ana ki te whakanui nui me te ia pōuri iti. Ko te rangahau mō ngā hononga heterojunction van der Waals o ngā rauemi rua-ahu (2D) e whakaatu ana i ngā tūmanakohanga whānui i roto i te whanaketanga o ngā APD mahi-teitei. I whiriwhiria e ngā kairangahau mai i Haina te rauemi semiconductor rua-ahu bipolar WSe₂ hei rauemi whakaahua-aro, ā, i whakaritea paitia te taputapu kimi whakaahua APD me te hanganga Pt/WSe₂/Ni e whai ana i te mahi taurite pai rawa atu, kia taea ai te whakaoti i te raruraru haruru whakanui ā-roto o te taputapu kimi whakaahua APD tuku iho.
I whakaarohia e te tīma rangahau he taputapu whakaahua-āwhati e ahu mai ana i te hanganga Pt/WSe₂/Ni, i tutuki ai te kitenga tino tairongo o ngā tohu mārama tino ngoikore i te taumata fW i te pāmahana rūma. I tīpakohia e rātou te rauemi haurua-ahu rua WSe₂, he tino pai ngā āhuatanga hiko, ā, i whakakotahihia ngā rauemi hiko Pt me Ni hei whakawhanake angitu i tētahi momo taputapu whakaahua-āwhati hou. Mā te arotau tika i te taurite mahi i waenga i te Pt, WSe₂ me te Ni, i hangaia he tikanga kawe ka taea te aukati i ngā kaikawe pōuri me te tuku i ngā kaikawe whakaahua kia haere. Ka whakaitihia e tēnei tikanga te haruru nui i puta mai i te ionization pānga kaikawe, ka taea ai e te taputapu whakaahua te whakatutuki i te kitenga tohu whatu tino tairongo i te taumata haruru tino iti.
Kātahi, hei whakamārama i te tikanga kei muri i te pānga o te horonga wai i puta mai i te ngoikore o te papa hiko, i arotakehia tuatahitia e ngā kairangahau te hototahitanga o ngā mahi mahi ā-roto o ngā momo konganuku me te WSe₂. I hangaia he raupapa o ngā taputapu konganuku-haurua-konganuku (MSM) me ngā irahiko konganuku rerekē, ā, i whakahaerehia ngā whakamātautau e tika ana ki runga i a rātou. Hei tāpiri, mā te whakaiti i te marara o ngā kaikawe i mua i te tīmatanga o te horonga wai, ka taea te whakaiti i te matapōkere o te ionization pānga, ā, ka whakaitihia te haruru. Nō reira, i whakahaerehia ngā whakamātautau e tika ana. Hei whakaatu anō i te hiranga o te Pt/WSe₂/Ni APD e pā ana ki ngā āhuatanga urupare wā, i arotakehia anō e ngā kairangahau te whānui -3 dB o te taputapu i raro i ngā uara whakanui photoelectric rerekē.
E whakaatu ana ngā hua whakamātautau he tino iti te mana ōrite haruru (NEP) o te pūoko Pt/WSe₂/Ni i te pāmahana rūma, arā, 8.07 fW/√Hz anake. Ko te tikanga tēnei ka taea e te pūoko te tautuhi i ngā tohu whatu tino ngoikore. Hei tāpiri, ka taea e tēnei taputapu te mahi pumau i te auau whakarerekētanga o te 20 kHz me te whakanui teitei o te 5×10⁵, e whakaoti angitu ana i te aukati hangarau o ngā pūoko photovoltaic tuku iho e uaua ana ki te whakataurite i te whakanui teitei me te whānui o te raraunga. E matapaetia ana ka whakaratohia e tēnei āhuatanga he painga nui ki ngā tono e hiahia ana ki te whakanui teitei me te haruru iti.
E whakaatu ana tēnei rangahau i te tūranga nui o te hangarau rauemi me te arotautanga atanga ki te whakarei ake i te mahi anga kaitirotiro whakaahuaNā te hoahoa auaha o ngā irahiko me ngā rauemi rua-ahu, kua tutuki he pānga tiaki o ngā kaikawe pōuri, e whakaiti ana i te pokanoa haruru me te whakapai ake i te pai o te kimi.
Kāore te mahi a tēnei taputapu kite e whakaatahia ana i roto i ngā āhuatanga hiko-whakaahua anake, engari he whānui hoki ngā tono. Nā te mea he pai te aukati i te au pōuri i te pāmahana rūma me te mimiti pai o ngā kaikawe hiko-whakaputa, he tino pai tēnei taputapu kite mō te kite i ngā tohu mārama ngoikore i roto i ngā mara pēnei i te aroturuki taiao, te mātakitaki whetū, me te whakawhitiwhiti kōrero whatu. Ehara i te mea ko tēnei whakatutukitanga rangahau anake e whakarato ana i ngā whakaaro hou mō te whanaketanga o ngā taputapu kite whakaahua rauemi iti-ahu, engari e tuku ana hoki i ngā tohutoro hou mō te rangahau me te whanaketanga o ngā taputapu hiko-whakaahua mahi-teitei me te iti-mana ā muri ake nei.
Wā tuku: Pipiri-18-2025