Noiʻi Hou ma ka Photodetector Avalanche Haʻahaʻa

Noiʻi Hou ma ka Photodetector Avalanche Haʻahaʻa

ʻO ka ʻike ʻana i ke ʻano kiʻekiʻe o nā ʻenehana photon liʻiliʻi a i ʻole hoʻokahi-photon e paʻa ana i nā manaʻolana noi koʻikoʻi ma nā kahua e like me ke kiʻi ʻana i ke kukui haʻahaʻa, ka ʻike mamao a me ka telemetry, a me ke kamaʻilio quantum. I waena o lākou, ua lilo nā photodetectors avalanche (APD) i kuhikuhi koʻikoʻi ma ke kahua o ka noiʻi hāmeʻa optoelectronic ma muli o ko lākou liʻiliʻi, ka pono kiʻekiʻe a me ka hoʻohui maʻalahi. ʻO ka lākiō Signal-to-noise (SNR) kahi hōʻailona koʻikoʻi o APD Photodetector, kahi e koi ai i ka loaʻa kiʻekiʻe a me ke au pouli haʻahaʻa. Hōʻike ka noiʻi ʻana ma nā mea ʻelua-dimensional (2D) van der Waals heterojunctions i nā manaʻolana ākea i ka hoʻomohala ʻana o nā APD hana kiʻekiʻe. Ua koho nā kānaka noiʻi mai Kina i ka mea semiconductor bipolar ʻelua-dimensional WSe₂ ma ke ʻano he mea photosensitive a hoʻomākaukau pono i ka ʻano Pt/WSe₂/Ni.Mea ʻike kiʻi APDme ka hana hana kūpono loa e hoʻoponopono i ka pilikia walaʻau loaʻa kūlohelohe o ka APD kuʻuna.

Ua hāpai nā mea noiʻi i kahimea ʻike kiʻi avalanchema muli o ke ʻano Pt/WSe₂/Ni, e hoʻokō ana i ka ʻike koʻikoʻi loa o nā hōʻailona mālamalama nāwaliwali loa ma ka pae fW ma ka mahana o ka lumi. Ua koho lākou i ka mea semiconductor ʻelua-dimensional WSe₂, nona nā waiwai uila maikaʻi loa, a ua hui pū me nā mea electrode Pt a me Ni e hoʻomohala pono i kahi ʻano hou o ka photodetector avalanche. Ma ka hoʻomaikaʻi pololei ʻana i ka hana hana ma waena o Pt, WSe₂ a me Ni, ua hoʻolālā ʻia kahi ʻano halihali e hiki ke pale pono i nā mea lawe ʻeleʻele me ka ʻae ʻana i nā mea lawe photogenerated e hele. Hoʻemi nui kēia ʻano hana i ka walaʻau keu i hoʻokumu ʻia e ka ionization hopena o ka mea lawe, e hiki ai i ka photodetector ke hoʻokō i ka ʻike hōʻailona optical koʻikoʻi loa ma kahi pae walaʻau haʻahaʻa loa.

Hōʻike kēia haʻawina i ke kuleana koʻikoʻi o ka ʻenekinia mea a me ka hoʻonui ʻana i ka interface i ka hoʻomaikaʻi 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, e hōʻemi nui ana i ka hoʻopilikia walaʻau a hoʻomaikaʻi hou aku i ka pono o ka ʻike ʻana. ʻAʻole i hōʻike wale ʻia ka hana o kēia mea ʻike ma kona ʻano photoelectric, akā he mau manaʻolana noi ākea hoʻi. Me kona pale pono ʻana i ke au pouli ma ka mahana o ka lumi a me ka omo pono ʻana o nā mea lawe photogenerated, kūpono loa kēia photodetector no ka ʻike ʻana i nā hōʻailona mālamalama nāwaliwali ma nā kahua e like me ka nānā ʻana i ke kaiapuni, ka nānā ʻana i ka astronomy, a me ke kamaʻilio optical. ʻAʻole wale kēia hoʻokō noiʻi e hāʻawi i nā manaʻo hou no ka hoʻomohala ʻana i nā photodetectors mea haʻahaʻa-dimensional, akā hāʻawi pū kekahi i nā kuhikuhi hou no ka noiʻi e hiki mai ana a me ka hoʻomohala ʻana i nā mea hana optoelectronic hana kiʻekiʻe a me ka mana haʻahaʻa.