Kufambira mberi munguva pfupi yapfuura mukushandisa ma photodetector e high sensitivity avalanche

Kufambira mberi munguva pfupi yapfuura muma photodetector e avalanche ane hunhu hwepamusoro

Kunzwa kwakanyanya kwekupisa kwemukamuri 1550 nmdetector ye photodiode yeavalanche

Mubhendi re near infrared (SWIR), ma avalanche diode ane high sensitivity high speed anoshandiswa zvakanyanya mu optoelectronic communication uye liDAR applications. Zvisinei, current near infrared avalanche photodiode (APD) inodzorwa neIndium gallium arsenic avalanche breakdown diode (InGaAs APD) yagara ichiganhurirwa ne random collision ionization noise yezvinhu zve traditional multiplier region, indium phosphide (InP) uye indium aluminium arsenic (InAlAs), zvichikonzera kudzikira kukuru kwekunzwa kwemudziyo. Mumakore apfuura, vaongorori vazhinji vari kutsvaga zvinhu zvitsva zve semiconductor zvinoenderana neInGaAs neInP optoelectronic platform processes uye zvine ultra-low impact ionization noise performance yakafanana nezvinhu zve bulk silicon.

Chinoongorora maavalanche photodiode che 1550 nm chinobatsira pakugadzirwa kwemasisitimu eLiDAR

Chikwata chevaongorori muUnited Kingdom neUnited States kekutanga chakabudirira kugadzira chishandiso chitsva cheAPD che 1550 nm chinonzwa zvakanyanya (ultra-high sensitivity).chinhu chinoona mafashamo emvura), budiriro inovimbisa kuvandudza zvikuru mashandiro emasisitimu eLiDAR nemamwe maapplication e optoelectronic.

Zvinhu zvitsva zvinopa mabhenefiti akakosha

Chinhu chikuru chekutsvaga uku kushandiswa kwezvinhu zvitsva. Vaongorori vakasarudza GaAsSb sechikamu chinonyudza mvura uye AlGaAsSb sechikamu chinowanza mvura. Dhizaini iyi yakasiyana neInGaAs/InP yechinyakare uye inounza mabhenefiti akakosha:

1. GaAsSb absorption layer: GaAsSb ine absorption coefficient yakafanana neInGaAs, uye shanduko kubva kuGaAsSb absorption layer kuenda kuAlGaAsSb (multiplier layer) iri nyore, zvichideredza trap effect uye zvinovandudza kumhanya uye kushanda zvakanaka kweabsorption yemudziyo.

2. AlGaAsSb multiplier layer: AlGaAsSb multiplier layer iri nani pane yekare InP neInAlAs multiplier layer mukushanda kwayo. Inonyanya kuratidzwa nekuwedzera kwakanyanya patembiricha yemumba, bandwidth yakakwira uye ruzha rwakaderera zvakanyanya.

Nezviratidzo zvekushanda zvakanaka

ItsvaChinoongorora mufananidzo cheAPD(avalanche photodiode detector) inopawo kuvandudzwa kukuru mukuita kwezviyero:

1. Kuwana kwakanyanya kwazvo: Kuwana kwakanyanya kwazvo kwe278 kwakawanikwa patembiricha yemumba, uye munguva pfupi yapfuura Dr. Jin Xiao akavandudza mashandiro ekugadzirisa chimiro uye maitiro acho, uye kuwedzera kukuru kwakawedzerwa kusvika kuM=1212.

2. Ruzha rwakaderera zvikuru: runoratidza ruzha rwakaderera zvikuru (F < 3, kuwana M = 70; F<4, kuwana M = 100).

3. Kushanda zvakanaka kwe quantum: pasi pekuwedzera kwakanyanya, kushanda zvakanaka kwe quantum kwakakwira kusvika 5935.3%. Kugadzikana kwakasimba kwekushisa: kukanganiswa kwekuputsika pakupisa kwakaderera kunenge 11.83 mV/K.

Mufananidzo 1 Ruzha rwakawandisa rweAPDzvishandiso zvekuongorora mifananidzozvichienzaniswa nedzimwe APD photodetector

Mikana yakawanda yekushandisa

Iyi APD itsva ine zvazvinoreva zvakakosha kune liDAR systems uye ma photon applications:

1. Kuvandudzwa kwehuwandu hwesignali-ku-ruzha: Hunhu hwekuwedzera kwepamusoro uye hunhu hweruzha rwakaderera hunovandudza zvikuru huwandu hwesignali-ku-ruzha, izvo zvakakosha pamashandisirwo munzvimbo dzisina photon, dzakadai sekutarisa magasi egreenhouse.

2. Kuenderana kwakasimba: Chinoongorora mifananidzo cheAPD (avalanche photodetector) chitsva chakagadzirwa kuti chienderane nemapuratifomu eIndium Phosphide (InP) optoelectronics aripo, zvichiita kuti chive nechokwadi chekuti chinobatana zvakanaka nemasisitimu ekutaurirana ekutengeserana aripo.

3. Kushanda zvakanaka kwazvo: Inogona kushanda zvakanaka patembiricha yemumba isina nzira dzakaoma dzekutonhodza, zvichiita kuti zvive nyore kuisa zvinhu mumabasa akasiyana-siyana anoshanda.

Kugadzirwa kweiyi itsva 1550 nm SACM APD photodetector (avalanche photodetector) inomiririra budiriro huru mumunda, Inogadzirisa zvipingamupinyi zvakakosha zvine chekuita neruzha rwakawandisa uye zvigadzirwa zvegain bandwidth mumagadzirirwo echinyakare eAPD photodetector (avalanche photodetector). Iyi itsva inotarisirwa kuwedzera kugona kwemasisitimu e-liDAR, kunyanya mumasisitimu e-liDAR asina vanhu, pamwe nekutaurirana munzvimbo dzakasununguka.