Chinoongorora mafotoni chimwe chete chapfuura nepakati pechinonetsa kushanda zvakanaka che80%

Chinoongorora mufananidzo chega chegavakapfuura nemuganho we80% wekushanda zvakanaka

Imwe-photonmudziyo wekuona fotoAnoshandiswa zvakanyanya muminda ye quantum photonics uye single-photon imaging nekuda kwezvakanaka zvawo zvidiki uye zvakachipa, asi anosangana nematambudziko ehunyanzvi anotevera.

Zvipingamupinyi zvehunyanzvi zviripo parizvino

1. CMOS ne thin-junction SPAD: Kunyangwe vaine high integration uye low timing jitter, absorption layer yakatetepa (ma micrometer mashoma), uye PDE yakaganhurirwa munzvimbo ye near-infrared, ine angangoita 32% chete pa 850 nm.

2. Gobvu-joinction SPAD: Ine gobvu rekuisa mvura muchikamu che micrometers makumi maviri. Zvigadzirwa zvekutengeserana zvine PDE inosvika 70% pa780 nm, asi kupinza 80% kwakaoma zvikuru.

3. Verenga miganhu yedunhu: Gobvu-joinction SPAD inoda voltage inodarika 30V kuti ive nechokwadi chekuti pane mukana wekuputika kwemvura. Kunyangwe paine voltage inodzima ye68V mumaseketi echinyakare, PDE inogona kuwedzerwa kusvika pa75.1%.

Mhinduro

Gadzirisa chimiro chesemiconductor cheSPAD. Dhizaini yakavhenekerwa kumashure: Maphotoni echiitiko anoora zvakanyanya musilicon. Chimiro chakavhenekerwa kumashure chinoita kuti maphotoni mazhinji anyudzwe muchikamu chekunyudzwa, uye maerekitironi anogadzirwa apinzwe munzvimbo yeavalanche. Nekuti mwero weionization wemaerekitironi musilicon wakakwira kupfuura wemaburi, kupinza maerekitironi kunopa mukana wepamusoro weavalanche. Doping compensation avalanche region: Nekushandisa nzira inoenderera mberi ye boron ne phosphorus, doping yakashama inobhadharwa kuti iunganidze munda wemagetsi munzvimbo yakadzika isina zvikanganiso zvekristaro, zvichideredza ruzha rwakaita seDCR.

2. Dunhu rekuverenga rinoita basa repamusoro. Kudzima kwe50V high amplitude Kuchinja kwemamiriro ekunze nekukurumidza; Kushanda kwemultimodal: Nekubatanidza FPGA control QUENCHING uye RESET signals, kuchinja kunochinjika pakati pekushanda kwakasununguka (signal trigger), gating (external GATE drive), uye hybrid modes kunowanikwa.

3. Kugadzirira uye kurongedza mudziyo. Maitiro eSPAD wafer anoshandiswa, nepakeji yebhatafurayi. Iyo SPAD inosungirirwa kune substrate yeAlN carrier uye inoiswa yakatwasuka pane thermoelectric cooler (TEC), uye kudzora tembiricha kunoitwa kuburikidza nethermistor. Multimode optical fibers dzakanyatsoenderana neSPAD centre kuti dzibatanidzwe zvakanaka.

4. Kuenzanisa mashandiro. Kuenzanisa kwakaitwa uchishandisa 785 nm picosecond pulsed laser diode (100 kHz) uye time-digital converter (TDC, 10 ps resolution).

Pfupiso

Nekugadzirisa chimiro cheSPAD (gobvu junction, back-lightened, doping compensation) uye kugadzira 50 V quenching circuit, chidzidzo ichi chakabudirira kusundira PDE ye silicon-based single-photon detector kusvika pakakwirira kwe84.4%. Zvichienzaniswa nezvigadzirwa zvekutengeserana, kushanda kwayo kwakazara kwakawedzerwa zvakanyanya, zvichipa mhinduro dzinoshanda dzemashandisirwo akadai se quantum communication, quantum computing, uye high-sensitivity imaging inoda kushanda kwakanyanya uye kushanda kwakasununguka. Basa iri rakaisa hwaro hwakasimba hwekuvandudzwa kwe silicon-based.chinoona chine photon imwe chetetekinoroji.