Nhanganyaya, photon counting typelinear avalanche photodetector
Photon kuverenga tekinoroji inogona kukwirisa zvizere iyo photon siginecha yekukunda kuverenga kuverenga kwemidziyo yemagetsi, uye kurekodha huwandu hwemafotoni anoburitswa ne detector mune imwe nguva yenguva nekushandisa yakasikwa discrete hunhu hweiyo detector inoburitsa magetsi chiratidzo pasi pesimba risina simba reradiation. , uye kuverenga ruzivo rwechinangwa chakayerwa maererano nekukosha kwemamita e photon. 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 maseketi, ine Ultra-yakakwirira simba renji, yakafara. uye tunable spectral mhinduro renji, uye inogona kuve yakazvimiririra yakagadziridzwa yekuona kunyatsoita uye manyepo 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. Iko kunenge kusisina 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 chiyero chemidziyo inenge isingadzike nekuwedzera kwekuwana, inova yakanaka infraredAvalanche 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 yekuverenga mafotoni ine zvakawanda zvakanaka, senge yakakwira chiratidzo-kune-ruzha reshiyo, rusaruro rwakakura, chiyero chechiyero chepamusoro, yakanaka anti-drift, yakanaka nguva kugadzikana, uye inogona kuburitsa data kumakombuta nenzira yedhijitari yekuongorora kunotevera. uye kugadzirisa, izvo zvisingaenzaniswi nedzimwe nzira dzekuona. Parizvino, iyo photon counting system yakashandiswa zvakanyanya mundima yekuyera maindasitiri uye yakaderera-mwenje yekuona, senge nonlinear optics, molecular biology, Ultra-yakakwirira resolution spectroscopy, nyeredzi photometry, kusvibiswa kwemhepo kuyerwa, nezvimwewo, zvine hukama kusvika pakutora uye kuona zviratidzo zvechiedza chisina simba. Iyo mercury cadmium telluride avalanche photodetector ine inenge isina ruzha rwakanyanya, sezvo kuwedzera kunowedzera, chiratidzo-ku-ruzha chiyero hachiora, uye hapana nguva yekufa uye post-pulse kurambidzwa kwakabatana neGeiger avalanche zvishandiso, iyo yakakodzera kwazvo. application mukuverenga photon, uye yakakosha kutungamira kutungamira kwephoton kuverenga zvishandiso mune ramangwana.
Nguva yekutumira: Jan-14-2025