Imikorere-yimikorere-yonyine itwarwa na infrarafoteri

Imikorere-yo hejuru-yonyineinfrared Photodetector

infraredgufotoraifite ibiranga imbaraga zikomeye zo kurwanya-kwivanga, ubushobozi bukomeye bwo kumenya intego, ibikorwa-byose byikirere no guhisha neza. Irimo igira uruhare runini mubikorwa nkubuvuzi, igisirikare, ikoranabuhanga mu kirere n’ubuhanga bw’ibidukikije. Muri bo, abikorera ku giti cyabogutahura amashanyarazichip ishobora gukora yigenga idafite amashanyarazi yinyongera yo hanze yakwegereye abantu benshi murwego rwo gutahura infragre kubera imikorere yayo idasanzwe (nk'ubwigenge bw'ingufu, ibyiyumvo bihanitse kandi bihamye, nibindi). Ibinyuranye na byo, imashini gakondo yerekana amashanyarazi, nka silikoni ishingiye cyangwa ya bandbandgap ya semiconductor ishingiye kuri infragre ya infragre, ntibisaba gusa imbaraga zinyongera zo kubogama kugirango itandukane nabatwara fotogène kugirango ikore fotokoreri, ariko kandi ikenera ubundi buryo bwo gukonjesha kugirango igabanye urusaku rwumuriro kandi itezimbere. Kubwibyo, byabaye ingorabahizi kuzuza ibitekerezo bishya nibisabwa mu gisekuru kizaza cya chipi ya infragre de cheque mugihe kizaza, nko gukoresha ingufu nke, ingano nto, igiciro gito kandi ikora neza.

Vuba aha, amatsinda yubushakashatsi yaturutse mu Bushinwa na Suwede yatanze igitekerezo gishya cya pin heterojunction yikorera-imashini itwara amashanyarazi mato mato (SWIR) yerekana amashanyarazi ashingiye kuri firime ya graphene nanoribbon (GNR) / alumina / silicon imwe ya kirisiti. Munsi yingaruka ziterwa na optique ya gati ya optique iterwa na interineti itandukanye kandi yubatswe mumashanyarazi, chip yerekanaga ultra-high reaction no gutahura kuri zero bias voltage. Chip yerekana amashanyarazi ifite igipimo cyo gusubiza kigera kuri 75.3 A / W muburyo bwo kwiyobora, igipimo cyo gutahura cya 7.5 × 10¹⁴ Jones, hamwe na kwant yo hanze igera hafi kuri 104%, bigatuma imikorere yo gutahura ubwoko bumwe bwa chipi ishingiye kuri silikoni yanditseho 7 byerekana ubunini. Mubyongeyeho, muburyo busanzwe bwo gutwara ibinyabiziga, igipimo cyibisubizo bya chip, igipimo cyo gutahura, hamwe na kwantumasi yo hanze byose bigera kuri 843 A / W, 10¹⁵ Jones, na 105%, ibyo byose ni indangagaciro zo hejuru zavuzwe mubushakashatsi buriho. Hagati aho, ubu bushakashatsi bwerekanye kandi uburyo nyabwo bwo gukoresha imashini ifata amashanyarazi mu rwego rwo gutumanaho kwa optique no kwerekana amashusho ya infragre, byerekana ubushobozi bwayo bwo gukoresha.

Kugirango twige neza imikorere yifoto yumuriro wa fotodetector ishingiye kuri graphene nanoribbons / Al₂O₃ / silicon imwe ya kirisiti, abashakashatsi bapimye static (static-voltage curve) hamwe nibisubizo biranga imbaraga (kugihe cyigihe). Kugirango usuzume neza uburyo bwiza bwo gusubiza ibintu biranga graphene nanoribbon / Al₂O₃ / monocrystalline silicon heterostructure Photodetector munsi yumubyigano utandukanye wa bias, abashakashatsi bapimye igisubizo kigezweho cyibikoresho kuri 0 V, -1 V, -3 V na -5 V kubogama, hamwe nubucucike bwa optique bwa 8.15 μW / cm². Photocurrent yiyongera hamwe na bias ihindagurika kandi yerekana umuvuduko wo gusubiza byihuse kuri voltage zose.

Hanyuma, abashakashatsi bahimbye sisitemu yo gufata amashusho kandi bagera ku mashusho yifashishije amashusho ya infragre ngufi. Sisitemu ikora munsi ya zeru kandi nta mbaraga zikoreshwa na gato. Ubushobozi bwo gufata amashusho bwa Photodetector bwasuzumwe hifashishijwe mask yumukara hamwe ninyuguti ya “T” (nkuko bigaragara ku gishushanyo 1).

Mu gusoza, ubu bushakashatsi bwahimbye neza fotodetekeri ikoreshwa na graphene nanoribbons kandi igera ku gipimo cyo gusubiza hejuru. Hagati aho, abashakashatsi berekanye neza itumanaho ryiza hamwe nubushobozi bwo gufata amashusho yibigufotora cyane. Ubu bushakashatsi bwagezweho ntabwo butanga gusa uburyo bufatika bwo guteza imbere graphene nanoribbons hamwe nibikoresho bya optoelectronic bishingiye kuri silicon, ahubwo binagaragaza imikorere yabo myiza nkibikoresho byifashishwa na fotora yifotora.