Imwe-photon photodetector yapaza iyo 80% kunyatsoita bhodhoro

Imwe-photon photodetectorvakapaza iyo 80% kunyatsoita bhodhoro

Imwe-photonphotodetectoranoshandiswa zvakanyanya muminda ye quantum photonics uye imwe-photon imaging nekuda kweiyo compact uye yakaderera-mutengo wakanakira, asi ivo vanotarisana neinotevera tekinoroji mabhodhoro.

Zvipimo zvazvino zvehunyanzvi

1.CMOS uye yakaonda-junction SPAD: Kunyange zvazvo vane yakakwirira kubatanidzwa uye yakaderera nguva jitter, absorption layer yakaonda (mamicrometer mashoma), uye PDE inogumira munzvimbo iri pedyo-infrared, ine chete inenge 32% pa850 nm.

2. Gobvu-junction SPAD: Inoisa mutsetse wekunyura makumi emamicrometer akakora. Zvigadzirwa zvekutengesa zvine PDE ingangoita 70% pa780 nm, asi kupaza ne80% kunonetsa zvakanyanya.

3. Verenga kunze kwemiganhu yedunhu: Gobvu-junction SPAD inoda overbias voltage inopfuura 30V kuti ive nechokwadi chepamusoro-soro inogona kuitika. Kunyangwe nemagetsi ekudzima e68V mumaseketi echinyakare, iyo PDE inogona kungowedzerwa kusvika 75.1%.

Solution

Gadzirisa iyo semiconductor chimiro cheSPAD. Kumashure-yakavhenekerwa dhizaini: Chiitiko mafotoni anoora exponentially musilicon. Iyo yekumashure-yakavhenekerwa chimiro inovimbisa kuti ruzhinji rwemafotoni anonyudzwa muchikamu chekunyura, uye maerekitironi anogadzirwa anopinzwa munzvimbo yeavalanche. Nekuda kwekuti mwero weionization wemaerekitironi musilicon wakakwira kupfuura iwo wemakomba, jekiseni remagetsi rinopa mukana wepamusoro weavalanche. Doping compensation avalanche region: Nekushandisa inoenderera mberi diffusion process ye boron ne phosphorus, iyo isina kudzika doping inobhadharwa kuti itarise nzvimbo yemagetsi munzvimbo yakadzika ine mashoma ekristaro hurema, zvinobudirira kuderedza ruzha senge DCR.

2. High-performance readout circuit. 50V yakakwirira amplitude inodzima Fast state shanduko; Multimodal oparesheni: Nekubatanidza FPGA yekudzora QUENCHING uye RESET masiginecha, inochinjika switching pakati pemahara kushanda (signal trigger), gating (yekunze GATE drive), uye mahybrid modes anowanikwa.

3. Kugadzirira kwechigadzirwa uye kurongedza. Iyo SPAD wafer process inogamuchirwa, ine butterfly package. Iyo SPAD inosungirirwa kune iyo AlN inotakura substrate uye yakatwasuka yakaiswa pane thermoelectric inotonhorera (TEC), uye tembiricha kutonga kunowanikwa kuburikidza ne thermistor. Multimode optical fibers yakanyatso kurongeka neSPAD centre kuti ibudirire kubatanidzwa.

4. Performance calibration. Calibration yakaitwa uchishandisa 785 nm picosecond pulsed laser diode (100 kHz) uye nguva-digital converter (TDC, 10 ps resolution).

Summary

Nekunatsiridza chimiro cheSPAD (mushonga wakakora, wakavhenekerwa kumashure, muripo wedoping) uye nekuvandudza dunhu rekudzima 50 V, chidzidzo ichi chakabudirira kusundidzira PDE yesilicon-based single-photon detector kusvika paurefu hutsva hwe84.4%. Kuenzaniswa nezvigadzirwa zvekutengesa, kushanda kwayo kwakadzama kwakasimudzirwa zvakanyanya, zvichipa mhinduro dzinoshanda dzezvikumbiro senge quantum communication, quantum computing, uye high-sensitivity imaging inoda ultra-high performance uye flexible operation. Iri basa rakaisa hwaro hwakasimba hwekuenderera mberi kwekusimudzira kwesilicon-basedsingle-photon detectorteknolojia.