Imashini ipima amashusho ya infrared ikora neza cyane

Ikora neza cyane kandi ikora ku giti cyayoicyuma gipima foto cya infrarouge

infrarougeicyuma gipima fotoifite imiterere yo kurwanya ingaruka zikomeye, kumenya intego cyane, gukora neza mu gihe cyose cy’ikirere no guhisha neza. Irimo kugira uruhare runini mu nzego nk'ubuvuzi, igisirikare, ikoranabuhanga ryo mu kirere n'ubuhanga mu bidukikije. Muri zo, harimo kwikoreragupima amashanyaraziChip ishobora gukora ku giti cyayo nta ngufu z’inyongera ziturutse hanze yakuruye ibitekerezo byinshi mu bijyanye no gupima infrared bitewe n’imikorere yayo yihariye (nk’ingufu zigenga, ubushobozi bwo kumva no guhagarara neza, nibindi). Mu buryo bunyuranye, chips gakondo zo gupima amashanyarazi, nka chips za infrared zishingiye kuri silicon cyangwa narrowbandgap, ntizisaba gusa voltages z’inyongera kugira ngo zitume ibice by’amashanyarazi bivangwa n’ifoto bivangwa kugira ngo bikore photocurrents, ahubwo zikeneye kandi sisitemu zo gukonjesha ziyongeraho kugira ngo zigabanye urusaku rw’ubushyuhe no kunoza uburyo bwo gusubiza ibintu. Kubwibyo, byaragoranye kuzuza ibitekerezo bishya n’ibisabwa n’itsinda ritaha ry’imashini zo gupima infrared mu gihe kizaza, nko gukoresha ingufu nke, ingano nto, igiciro gito n’imikorere myiza.

Vuba aha, amatsinda y’ubushakashatsi yo mu Bushinwa na Suwede yatanze igitekerezo cy’imashini nshya yo gupima amashanyarazi ikoresheje pin heterojunction yigenga ikoresha ikoranabuhanga rya infrared short-wave (SWIR) ishingiye kuri filime za graphene nanoribbon (GNR)/alumina/silicone imwe ya kristale. Mu ngaruka zihuriweho z’ingaruka za optique gating ziterwa n’uburyo butandukanye bwo gupima n’amashanyarazi yubatswemo, iyi mashini yagaragaje ubushobozi bwo kumenya no kumenya ibintu ku muvuduko wa zero bias. Iyi mashini yo gupima amashanyarazi ifite igipimo cya A response kingana na 75.3 A/W mu buryo bwo kwiyobora, igipimo cya 7.5 × 10¹⁴ Jones, n’ubushobozi bwa quantum bwo hanze hafi ya 104%, binongera ubushobozi bwo kumenya ubwoko bumwe bwa silicon-based chips ku rugero rwa 7. Byongeye kandi, mu buryo busanzwe bwo gupima, igipimo cya chip, igipimo cya external quantum, n’ubushobozi bwa external quantum byose biri hejuru ya 843 A/W, 10¹⁵ Jones, na 105%, byose bikaba ari agaciro ko hejuru kavuzwe mu bushakashatsi buriho ubu. Hagati aho, ubu bushakashatsi bwagaragaje kandi uburyo chip yo gupima amashanyarazi ikoreshwa mu buryo bufatika mu itumanaho ry’amajwi n’amashusho ya infrared, bigaragaza ubushobozi bwayo bukomeye bwo kuyikoresha.

Kugira ngo bigane neza imikorere y’icyuma gipima urumuri hakoreshejwe ikoranabuhanga rya graphene nanoribbons /Al₂O₃/ single crystal silikoni, abashakashatsi bapimye uburyo gipima urumuri hakoreshejwe ikoranabuhanga rya static (current-voltage current) n’uburyo gipima urumuri hakoreshejwe ikoranabuhanga rya dynamic (current-time current). Kugira ngo basuzume neza imiterere y’igikoresho gipima urumuri hakoreshejwe ikoranabuhanga rya graphene nanoribbon /Al₂O₃/ monocrystalline silicon heterostructure hifashishijwe volteji zitandukanye za bias, abashakashatsi bapimye uburyo dynamic current ikora kuri 0 V, -1 V, -3 V na -5 V biases, hamwe n’ubucucike bw’ingufu za optique bwa 8.15 μW/cm². Umuriro w’ingufu wiyongera hamwe n’uburyo gipima urumuri kandi ukerekana umuvuduko wihuse w’uburyo gipima urumuri hakoreshejwe ikoranabuhanga rya bias voltages zose.

Amaherezo, abashakashatsi bakoze sisitemu yo gufata amashusho maze bagera ku bushobozi bwo gufata amashusho y’infrarouge ngufi. Sisitemu ikora nta bias na gato kandi nta ngufu ikoresha. Ubushobozi bwo gufata amashusho bw’icyuma gipima amashusho bwasuzumwe hakoreshejwe agapfukamunwa k’umukara gafite inyuguti ya "T" (nk’uko bigaragara ku Ishusho ya 1).

Mu gusoza, ubu bushakashatsi bwakoze neza mu gukora ibyuma bipima foto byikoresha ikoranabuhanga bishingiye kuri nanoribhoni za graphene kandi byageze ku gipimo cyo hejuru cy’ubutabazi. Hagati aho, abashakashatsi bagaragaje neza ubushobozi bw’itumanaho n’ishusho bw’iyiicyuma gipima amashusho gikira cyaneIyi ntambwe y’ubushakashatsi ntabwo itanga gusa uburyo bufatika bwo guteza imbere ibyuma bya graphene nanoribhoni n’ibikoresho bya optoelectronic bishingiye kuri silicon, ahubwo inagaragaza imikorere yabyo myiza nk’ibikoresho bipima ikirere bikoresha infrared bikoresha ikoranabuhanga rya short-wave.