Nhanganyaya, photon counting typelinear avalanche photodetector
Photon kuverenga tekinoroji inogona kukwidziridza chiratidzo chephoton kuti ikunde ruzha rwekuverenga rwemidziyo yemagetsi, uye kurekodha huwandu hwemafotoni anoburitswa ne detector mune imwe nguva yenguva nekushandisa yakasarudzika hunhu hweiyo detector inobuda chiratidzo chemagetsi pasi pechiedza chisina simba irradiation, uye kuverenga ruzivo rwechinangwa chakayerwa zvichienderana nekukosha kwemamita ephoton. Kuti uone kuoneswa kwechiedza chisina kusimba, mhando dzakawanda dzezviridzwa zvine fotoni yekuona kugona dzakadzidzwa munyika dzakasiyana siyana. A solid state avalanche photodiode (APD photodetector) mudziyo unoshandisa iyo yemukati photoelectric effect kuona masaini emwenje. Zvichienzaniswa nemidziyo yevacuum, yakasimba-nyika michina ine zvakanakira mhinduro nekukurumidza, kuverenga kwakasviba, kushandiswa kwesimba, vhoriyamu uye magnetic field senitivity, etc. Masayendisiti akaita tsvakurudzo yakavakirwa pane yakasimba-state APD photon kuverenga imaging teknolojia.
APD photodetector mudziyoine Geiger mode (GM) uye linear mode (LM) maviri ekushanda modes, ikozvino APD photon kuverenga imaging teknolojia inonyanya kushandisa Geiger mode APD device. Geiger modhi APD zvishandiso zvine yakanyanya kunzwisiswa pamwero weimwe chete photon uye yakakwirira yekupindura kumhanya kwemakumi ema nanoseconds kuwana yakakwirira nguva chaiyo. Zvisinei, Geiger mode APD ine mamwe matambudziko akadai se detector nguva yakafa, kuderera kwekuona kushanda zvakanaka, yakakura optical crossword uye yakaderera spatial resolution, saka zvakaoma kukwidziridza kupokana pakati pehupamhi hwekuona uye kuderera kwearamu yenhema. Photon counters yakavakirwa pedyo-noiseless high-gain HgCdTe APD madivayiri anoshanda mumutsara modhi, haana nguva yakafa uye crosstalk zvirambidzo, haana post-pulse yakabatana neGeiger modhi, haidi kudzima masekete, ine Ultra-yakakwirira simba renji, yakafara uye tunable spectral mhinduro renji, uye inogona yakazvimiririra optimized kuti ionekwe kushanda uye nhema kuverenga mwero. Inovhura nzvimbo itsva yekushandisa ye infrared photon counting imaging, inzira yakakosha yekusimudzira yephoton counting madivayiri, uye ine yakafara tarisiro yekushandiswa mukutarisa kwemuchadenga, yemahara kutaurirana kwenzvimbo, inoshanda uye yekungoita yekufungidzira, fringe tracking zvichingodaro.
Nheyo yekuverenga photon muHgCdTe APD zvishandiso
APD photodetector madivayiri anobva paHgCdTe zvinhu zvinogona kuvhara huwandu hwakawanda hwewavelengths, uye ionization coefficients yemaerekitironi nemakomba akasiyana zvakanyanya (ona Mufananidzo 1 (a)). Ivo vanoratidza imwe chete inotakura nzira yekuwedzera mukati meiyo yakachekwa-yavelength ye1.3 ~ 11 µm. Ikoko kunenge kusina ruzha rwakanyanya (kuenzaniswa neakawandisa ruzha chinhu FSi ~ 2-3 yeSi APD zvishandiso uye FIII-V ~ 4-5 yeIII-V yemhuri zvishandiso (ona Mufananidzo 1 (b)), kuitira kuti chiratidzo-ku-ruzha reshiyo yemidziyo inenge isingadzike nekuwedzera kwekuwana, inova yakanaka infrared.Avalanche photodetector.
FIG. 1 (a) Hukama pakati peiyo ionization coefficient ratio yemercury cadmium telluride zvinhu uye chikamu x cheCd; (b) Kuenzanisa kweakawandisa ruzha chinhu F yeAPD zvishandiso zvine akasiyana masisitimu
Photon kuverenga tekinoroji tekinoroji nyowani inogona kuburitsa masaini masaini kubva muruzha rwekupisa nekugadzirisa maphotoelectron pulses anogadzirwa nephotodetectormushure mekugamuchira imwe photon. Sezvo iyo yakaderera-yechiedza chiratidzo ichinyanya kupararira munharaunda yenguva, iyo yemagetsi chiratidzo inobuda ne detector zvakare yakasikwa uye discrete. Zvinoenderana nehunhu hwechiedza chisina kusimba, kukwidziridza pulse, kusarura kwepuruzi uye matekiniki ekuverenga madhijitari anowanzo shandiswa kuona chiedza chisina kusimba. Tekinoroji yemazuva ano yekuverengera mafotoni ine zvakawanda zvakanakira, seyeyero yechiratidzo-ku-ruzha, rusaruro rwakakura, kuyerwa kwechiyero chakanyanya, yakanaka anti-drift, yakanaka nguva kugadzikana, uye inogona kuburitsa data kumakomputa nenzira yedhijitari yekuongorora uye kugadzirisa kunotevera, iyo isingaenzaniswi nedzimwe nzira dzekuona. Parizvino, iyo photon counting system yakashandiswa zvakanyanya mumunda wekuyera kweindasitiri uye kudzika-chiedza kuona, senge nonlinear optics, molecular biology, ultra-high resolution spectroscopy, astronomical photometry, chiyero chekusvibiswa kwemuchadenga, nezvimwewo, izvo zvine hukama nekutora uye kuona kwechiratidzo chisina simba. Iyo mercury cadmium telluride avalanche photodetector ine inenge isina ruzha rwakanyanya, sezvo kuwedzera kunowedzera, chiratidzo-ku-ruzha chiyero hachiora, uye hapana nguva yakafa uye post-pulse kurambidzwa kwakabatana neGeiger avalanche zvishandiso, iyo yakanyatsokodzera kushandiswa mukuverenga photon, uye inokosha yekusimudzira nzira ye photon kuverenga zvishandiso mune ramangwana.
Nguva yekutumira: Jan-14-2025