Selelekela, mofuta oa ho bala photonSetšoantšo sa avalanche se mela
Theknoloji ea ho bala ea photon e ka holisa lets'oao la photon ka botlalo ho hlola lerata la ho bala la lisebelisoa tsa elektroniki, 'me ea rekota palo ea li-photons tse hlahisoang ke detector ka nako e itseng ka ho sebelisa litšoaneleho tsa tlhaho tse hlakileng tsa lets'oao la motlakase la detector tlas'a khanya e fokolang ea khanya. , le ho bala tlhahisoleseding ea sepheo se lekantsoeng ho latela boleng ba meter ea photon. E le ho lemoha ho lemoha ha leseli le fokolang haholo, mefuta e mengata e fapaneng ea lisebelisoa tse nang le bokhoni ba ho lemoha photon e 'nile ea ithutoa linaheng tse fapaneng. Avalanche photodiode e tiileng ea naha (APD photodetector) ke sesebelisoa se sebelisang matla a kahare a motlakase ho bona mats'oao a khanya. Ha ho bapisoa le lisebelisoa tsa vacuum, lisebelisoa tsa boemo bo tiileng li na le melemo e totobetseng ka lebelo la ho arabela, palo e lefifi, tšebeliso ea matla, molumo le matla a khoheli a matla a khoheli, joalo-joalo Bo-rasaense ba entse lipatlisiso ho latela theknoloji ea ho bala litšoantšo tsa APD photon.
Sesebelisoa sa APD photodetectore na le mokhoa oa Geiger (GM) le linear mode (LM) mekhoa e 'meli ea ho sebetsa, theknoloji ea hona joale ea APD ea ho bala lifoto e sebelisa mochine oa APD oa mokhoa oa Geiger. Lisebelisoa tsa APD tsa mokhoa oa Geiger li na le kutloisiso e phahameng boemong ba photon e le 'ngoe le lebelo le phahameng la karabo ea mashome a li-nanoseconds ho fumana ho nepahala ha nako e phahameng. Leha ho le joalo, Geiger mode APD e na le mathata a kang nako e shoeleng ea detector, ts'ebetso e tlaase ea ho lemoha, crossword e kholo ea optical le tharollo e tlaase ea sebaka, kahoo ho thata ho ntlafatsa ho hanyetsana pakeng tsa tekanyo e phahameng ea ho lemoha le tekanyo e tlaase ea alamo ea bohata. Lisebelisoa tsa photon tse thehiloeng ho lisebelisoa tsa HgCdTe APD tse haufi-noiseless tse phahameng li sebetsa ka mokhoa o ts'oanang, ha li na nako e shoeleng le lithibelo tsa crosstalk, ha li na post-pulse e amanang le mokhoa oa Geiger, ha li hloke li-circuits tsa ho tima, li na le mefuta e mengata e phahameng ea matla, e pharaletseng. le mefuta e fapaneng ea karabelo ea spectral, 'me e ka ntlafatsoa ka boits'oaro bakeng sa ts'ebetso ea ho lemoha le sekhahla sa palo e fosahetseng. E bula sebaka se secha sa ts'ebeliso ea litšoantšo tsa infrared photon, ke tataiso ea bohlokoa ea nts'etsopele ea lisebelisoa tsa ho bala lifoto, 'me e na le tebello e pharaletseng ea ts'ebeliso ea pono ea linaleli, puisano ea sebaka sa mahala, litšoantšo tse sebetsang le tse sa sebetseng, ho latela li-fringe joalo-joalo.
Molao-motheo oa ho bala lifoto ho lisebelisoa tsa HgCdTe APD
Lisebelisoa tsa APD photodetector tse thehiloeng ho thepa ea HgCdTe li ka koahela mefuta e mengata ea maqhubu, 'me li-coefficients tsa ionization tsa li-electrone le masoba li fapane haholo (bona Setšoantšo sa 1 (a)). Li bonts'a mochini o le mong oa ho atisa ka har'a maqhubu a khaotsoeng a 1.3 ~ 11 µm. Hoo e ka bang ha ho na lerata le feteletseng (ho bapisoa le lerata le feteletseng FSi ~ 2-3 ea lisebelisoa tsa Si APD le FIII-V~4-5 ea lisebelisoa tsa lelapa la III-V (sheba setšoantšo sa 1 (b)), e le hore pontšo- karo-karolelano ea lerata ea lisebelisoa hoo e batlang e sa fokotsehe ka keketseho ea phaello, e leng infrared e loketsengAvalanche photodetector.
FEIE. 1 (a) Kamano pakeng tsa phello ea ionization coefficient ratio ea mercury cadmium telluride material le karolo x ea Cd; (b) Papiso ea lerata le feteletseng F ea lisebelisoa tsa APD tse nang le lisebelisoa tse fapaneng tsa lisebelisoa
Theknoloji ea ho bala Photon ke theknoloji e ncha e ka ntšang mats'oao a mahlo ho tsoa lerata la mocheso ka ho rarolla maqhubu a photoelectron a hlahisoang kephotodetectorka mor'a ho amohela photon e le 'ngoe. Kaha lets'oao la leseli le tlase le qhalakantsoeng haholoanyane sebakeng sa nako, tlhahiso ea lets'oao la motlakase ke detector le eona ke ea tlhaho ebile e sa hlaka. Ho ea ka tšobotsi ena ea leseli le fokolang, ho phahamisa pulse, khethollo ea pulse le mekhoa ea ho bala ea digital hangata e sebelisoa ho lemoha khanya e fokolang haholo. Theknoloji ea sejoale-joale ea ho bala li-photon e na le melemo e mengata, joalo ka karo-karolelano e phahameng ea lerata, khethollo e phahameng, tekanyo e phahameng ea tekanyo, anti-drift e ntle, botsitso ba nako, 'me e khona ho hlahisa data ho komporo ka sebopeho sa lets'oao la dijithale bakeng sa tlhahlobo e latelang. le ts'ebetso, e sa bapisoang le mekhoa e meng ea ho lemoha. Hona joale, mokhoa oa ho bala oa photon o sebelisitsoe haholo lefapheng la tekanyo ea indasteri le ho lemoha leseli le tlaase, joalo ka li-nonlinear optics, biology ea molek'hule, spectroscopy ea ultra-high resolution, photometry ea linaleli, tekanyo ea tšilafalo ea sepakapaka, joalo-joalo. ho fumana le ho lemoha mats'oao a mabone a fokolang. The mercury cadmium telluride avalanche photodetector ha e na lerata le feteletseng, ha phaello e ntse e eketseha, tekanyo ea pontšo-ho-lerata ha e bole, 'me ha ho na nako e shoeleng le thibelo ea post-pulse e amanang le lisebelisoa tsa Geiger avalanche, tse loketseng haholo kopo ka ho bala photon, 'me ke tataiso ea bohlokoa ea nts'etsopele ea lisebelisoa tsa ho bala photon nakong e tlang.
Nako ea poso: Jan-14-2025