SPADsingle-photon avalanche photodetector
Apo SPAD photodetector sensors yakatanga kuunzwa, yainyanya kushandiswa munzvimbo dzakadzika-light kuona. Nekudaro, nekushanduka kwekuita kwavo uye nekuvandudzwa kwezvinodiwa zvechiitiko,SPAD photodetectormasensor ave achiwedzera kushandiswa muzviitiko zvevatengi senge mota radars, marobhoti, uye dzisina kutyaira mota dzemuchadenga. Nekuda kwekunzwa kwayo kwakanyanya uye kuderera kweruzha maitiro, iyo SPAD photodetector sensor yave sarudzo yakanaka yekuwana yakakwirira-chaiyo kudzika kwekuona uye yakaderera-mwenje kufungidzira.
Kusiyana neyakajairwa CMOS mifananidzo sensors (CIS) yakavakirwa paPN junctions, iyo yakakosha chimiro cheSPAD photodetector iavalanche diode inoshanda muGeiger modhi. Kubva pakuona kwemaitiro emuviri, kuoma kweSPAD photodetector kwakanyanya kudarika iyo yePN junction devices. Izvi zvinonyanya kuratidzwa mukuti pasi pekurerekera kwepamusoro, zvinogona kukonzera matambudziko akadai sejekiseni revatakuri vasina kuenzana, thermal electron effects, uye tunneling currents zvichibatsirwa nedefect states. Aya maitiro anoita kuti asangane nematambudziko akakomba padhizaini, maitiro, uye matunhu ekuvaka mazinga.
Common performance parameters yeSPAD avalanche photodetectorzvinosanganisira Pixel Size (Pixel Saizi), yakasviba kuverenga ruzha (DCR), mwenje wekuona mukana (PDE), yakafa Nguva (DeadTime), uye Nguva yekupindura (Nguva yekupindura). Aya ma paramita anobata zvakananga kuita kweSPAD avalanche photodetector. Semuenzaniso, iyo yakasviba kuverenga mwero (DCR) ndiyo yakakosha parameter yekutsanangura detector ruzha, uye SPAD inoda kuchengetedza kurerekera kwakakwira kupfuura kuparara kuti ishande seimwe-photon detector. Iko mukana wekuonekwa kwechiedza (PDE) inosarudza kunzwa kweSPADAvalanche photodetectoruye inobatwa nekusimba uye kugoverwa kwemunda wemagetsi. Mukuwedzera, DeadTime ndiyo nguva inodiwa kuti SPAD idzokere kumamiriro ayo ekutanga mushure mekutangwa, iyo inokanganisa huwandu hwepamusoro hwekuona photon uye mararamiro ane simba.
Mukuita optimization yemidziyo yeSPAD, hukama hwekumanikidzira pakati pepakati pekuita maparamendi idambudziko rakakura: semuenzaniso, pixel miniaturization inotungamira zvakananga kuPDE attenuation, uye kusungirirwa kwemasimu emagetsi emumucheto kunokonzerwa nehukuru miniaturization kuchakonzerawo kuwedzera kwakanyanya muDCR. Kuderedza nguva yekufa kuchakonzera ruzha rwemashure uye kukanganisa kurongeka kwejitter yenguva. Ikozvino, iyo yekucheka-kumucheto mhinduro yakawana imwe dhigirii yekudyidzana optimization kuburikidza nenzira dzakadai seDTI / kudzivirira loop (kudzvanya crosstalk uye kuderedza DCR), pixel optical optimization, kuunzwa kwezvinhu zvitsva (SiGe avalanche layer inosimudzira infrared mhinduro), uye matatu-dimensional akaturikidzana anoshanda kudzima maseketi.
Nguva yekutumira: Jul-23-2025