Kufambira mberi kwazvino mukunzwa kwakanyanya avalanche photodetectors

Mafambiro azvino muhigh senitivity avalanche photodetectors

Tembiricha yekamuri yakakwirira senitivity 1550 nmAvalanche photodiode detector

Mune iri pedyo infrared (SWIR) bhendi, high senitivity high speed avalanche diode inoshandiswa zvakanyanya muoptoelectronic communication uye liDAR application. Zvisinei, ikozvino iri pedyo-infrared avalanche photodiode (APD) inotungamirirwa neIndium gallium arsenic avalanche breakdown diode (InGaAs APD) yakagara yakaganhurirwa neruzha rwekurovera ionization kwechinyakare kuwanda kwedunhu zvinhu, indium phosphide (InP) uye indium aluminium arsenic (InAlAs mugumisiro weiyo arsenic) yakakosha. Kwemakore, vaongorori vazhinji vari kushingaira kutsvaga zvitsva semiconductor zvinhu zvinoenderana neInGaAs uye InP optoelectronic papuratifomu maitirwo uye ane Ultra-yakaderera kukanganisa ionization ruzha kuita zvakafanana nezvakawanda zvesilicon zvinhu.

Iyo itsva 1550 nm avalanche photodiode detector inobatsira kuvandudzwa kweLiDAR masisitimu.

Chikwata chevaongorori muUnited Kingdom neUnited States kekutanga vakabudirira kugadzira nyowani yepamusoro-yepamusoro senitivity 1550 nm APD photodetector (Avalanche photodetector), budiriro inovimbisa kuvandudza zvakanyanya mashandiro eLiDAR masisitimu uye mamwe maoptoelectronic application.

Zvishandiso zvitsva zvinopa zvakakosha zvakakosha

Chinonyanya kukosha chetsvagurudzo iyi mashandisirwo matsva ezvinyorwa. Vatsvagiri vakasarudza GaAsSb seyekunyudza layer uye AlGaAsSb seyakawanda layer. Iyi dhizaini inosiyana neyechinyakare InGaAs/InP uye inounza zvakakosha zvakakosha:

1.GaAsSb absorption layer: GaAsSb ine mutsara wakafanana wekutora kuInGaAs, uye kushanduka kubva kuGaAsSb kunyura mutsara kusvika kuAlGaAsSb (multiplier layer) iri nyore, kuderedza musungo uye kuvandudza kukurumidza uye kushandiswa kwechigadzirwa.

2.AlGaAsSb multiplier layer: AlGaAsSb multiplier layer iri pamusoro pechinyakare InP uye InAlAs kuwandisa layer mukuita. Iyo inonyanya kuratidzwa mukuwana yakakwira pane tembiricha yekamuri, yakakwira bandwidth uye Ultra-yakaderera yakawandisa ruzha.

Nezviratidzo zvekushanda zvakanakisa

Iyo itsvaAPD photodetector(avalanche photodiode detector) inopawo kuvandudzwa kwakakosha mukuita metrics:

1. Ultra-yakakwirira kuwana: The ultra-high gain ye278 yakawanikwa pakupisa kwekamuri, uye munguva ichangopfuura Dr. Jin Xiao akavandudza maitiro ekugadzirisa uye maitiro, uye pfuma yakawanda yakawedzerwa kusvika kuM = 1212.

2. Mutsindo wakaderera zvikuru: unoratidza ruzha rwakaderera zvikuru (F <3, kuwana M = 70; F<4, kuwana M=100).

3. High quantum performance: pasi pekuwana kwakanyanya, kuwanda kwehuwandu hunosvika 5935.3%. Kugadzikana kwekushisa kwakasimba: kuparara kwekunzwa pakushisa kwakadzika kunosvika 11.83 mV/K.

Fig 1 Kuwedzera ruzha rweAPDphotodetector zvishandisoichienzaniswa neimwe APD photodetector

Wide application tarisiro

Iyi APD nyowani ine zvakakosha zvakakosha kune liDAR masisitimu uye photon application:

1. Kuvandudzwa kwechiratidzo-ku-ruzha reshiyo: Kuwedzera kwepamusoro uye kuderera kweruzha maitiro anovandudza zvakanyanya chiratidzo-ku-ruzha reshiyo, iyo yakakosha kune zvikumbiro munzvimbo dzine urombo-photon, senge greenhouse gas monitoring.

2. Kubatana kwakasimba: Iyo itsva APD photodetector (avalanche photodetector) yakagadzirirwa kuti ienderane nezvino indium phosphide (InP) optoelectronics platforms, kuve nechokwadi chekubatanidza kusina kusimba nehurongwa huripo hwekutengeserana kwekutengeserana.

3. Kushanda kwepamusoro-soro kwekushanda: Inogona kushanda zvakanaka pakupisa kwekamuri pasina maitiro akaoma ekutonhora, kurerutsa kutumirwa mune zvakasiyana-siyana zvinoshanda.

Kuvandudzwa kweiyi itsva 1550 nm SACM APD photodetector (avalanche photodetector) inomiririra kubudirira kukuru mumunda, Inogadzirisa zvipimo zvakakosha zvine chekuita neruzha rwakawandisa uye kuwana bandwidth zvigadzirwa mune yechinyakare APD photodetector (avalanche photodetector) magadzirirwo. Ichi chitsva chinotarisirwa kukwidziridza hunyanzvi hweliDAR masisitimu, kunyanya mune isina kurongwa liDAR masisitimu, pamwe nemahara-munzvimbo yekutaurirana.