Noi'i hou no ka Ha'aha'a Avalanche Photodetector

Noi'i hou no ka Ha'aha'a Avalanche Photodetector

Loaʻa ka ʻike kiʻekiʻe o nā ʻenehana liʻiliʻi-photon a i ʻole hoʻokahi-photon i nā manaʻo noi nui i nā kula e like me ke kiʻi haʻahaʻa haʻahaʻa, ka ʻike mamao a me ka telemetry, a me ke kamaʻilio quantum. Ma waena o lākou, ua lilo ka avalanche photodetectors (APD) i alakaʻi koʻikoʻi ma ke kahua o ka noiʻi optoelectronic ma muli o ko lākou liʻiliʻi liʻiliʻi, kiʻekiʻe kiʻekiʻe a me ka maʻalahi hoʻohui. He hōʻailona koʻikoʻi ʻo APD Photodetector (SNR) e koi ana i ka loaʻa kiʻekiʻe a me ka pōʻeleʻele haʻahaʻa. ʻO ka noiʻi ʻana i nā mea ʻelua-dimensional (2D) van der Waals heterojunctions e hōʻike ana i nā manaʻo ākea i ka hoʻomohala ʻana i nā APD kiʻekiʻe. Ua koho nā mea noiʻi mai Kina i ka bipolar two-dimensional semiconductor material WSe₂ ma ke ʻano he kiʻi paʻi kiʻi a hoʻomākaukau pono i ka hale Pt/WSe₂/Ni.APD Photodetectorme ka hana hoʻohālikelike maikaʻi loa e hoʻoponopono i ka pilikia o ka walaʻau o ka APD kuʻuna.

Ua noi aku nā mea noiʻi i kahiʻike kiʻi avalanchema muli o ka hale Pt/WSe₂/Ni, e loaʻa ana ka ʻike makaʻala loa o nā hōʻailona māmā nāwaliwali loa ma ka pae fW ma ka wela lumi. Ua koho lākou i nā mea semiconductor ʻelua WSe₂, nona nā waiwai uila maikaʻi loa, a ua hui pū me nā mea electrode Pt a me Ni e hoʻomohala i kahi ʻano hou o ka avalanche photodetector. Ma ka hoʻopololei pololei ʻana i ka hana hana ma waena o Pt, WSe₂ a me Ni, ua hoʻolālā ʻia kahi mīkini lawe kaʻa e hiki ke pale pono i nā mea lawe ʻeleʻele ʻoiai e ʻae ana i nā mea lawe kiʻi kiʻi e hele. Hoʻemi nui kēia ʻano hana i ka leo nui i hoʻokumu ʻia e ka ionization hopena o ka mea lawe, hiki i ka photodetector ke hoʻokō i ka ʻike hōʻailona optical koʻikoʻi ma kahi pae haʻahaʻa haʻahaʻa.

Hōʻike kēia haʻawina i ke kuleana koʻikoʻi o ka ʻenekinia waiwai a me ka loiloi interface i ka hoʻonui ʻana i ka hana onā mea nānā kiʻi. Ma o ka hoʻolālā akamai o nā electrodes a me nā mea ʻelua-dimensional, ua hoʻokō ʻia ka hopena pale o nā mea lawe ʻeleʻele, me ka hoʻohaʻahaʻa nui ʻana i ke kani ʻana a me ka hoʻomaikaʻi ʻana i ka pono ʻike. ʻAʻole ʻike wale ʻia ka hana o kēia mea ʻike i kāna mau hiʻohiʻona photoelectric, akā loaʻa pū kekahi mau manaʻo noiʻi ākea. Me kona pale pono ʻana i ke au pōʻeleʻele ma ka lumi wela a me ka hoʻopili pono ʻana o nā mea lawe kiʻi kiʻi, kūpono loa kēia photodetector no ka ʻike ʻana i nā hōʻailona māmā nāwaliwali i nā kula e like me ka nānā ʻana i ke kaiapuni, ka nānā ʻana i ka astronomical, a me ka kamaʻilio optical. ʻAʻole hāʻawi kēia ʻimi noiʻi i nā manaʻo hou no ka hoʻomohala ʻana i nā mea kiʻi kiʻi haʻahaʻa haʻahaʻa, akā hāʻawi pū kekahi i nā kuhikuhi hou no ka noiʻi ʻana a me ka hoʻomohala ʻana i nā mea hana kiʻekiʻe a me ka mana haʻahaʻa optoelectronic.