Imashini ipima inkubi y'umuyaga ifite imiterere ibiri

Bipolar ifite imiterere ibiriicyuma gipima imiterere y'inkangu

Imashini ipima inkubi y'umuyaga ifite imiterere ibiri (Bipolar two-dimensional avalanche photodetector)APD ipima foto) igera ku rusaku ruri hasi cyane no kumenya uburyo bworoshye bwo kumva

Gupima fotoni nke cyangwa fotoni imwe mu buryo bworoshye bifite amahirwe menshi yo gukoreshwa mu nzego nko gufata amashusho y'urumuri ruto, kubona amashusho ari kure no kureba amashusho, ndetse no gutumanaho kwa quantum. Muri zo, icyuma gipima ikirere (APD) cyabaye icyerekezo cy'ingenzi mu bushakashatsi ku bikoresho bya optoelectronic bitewe n'imiterere yacyo y'ingano nto, imikorere myiza no guhuza byoroshye. Igipimo cy'urusaku hagati y'ibimenyetso n'urusaku (SNR) ni ikimenyetso cy'ingenzi cya icyuma gipima ikirere cya APD, gisaba ubwiyongere bwinshi n'umuraba muto w'umwijima. Ubushakashatsi ku mikoranire ya van der Waals y'ibikoresho bifite imiterere ibiri (2D) bugaragaza amahirwe menshi mu iterambere rya fotoni zifite imikorere myiza. Abashakashatsi bo mu Bushinwa bahisemo igikoresho cya semiconductor gifite imiterere ibiri ya WSe₂ nk'igikoresho cyoroshye kubona amashusho, ndetse n'icyuma gipima ikirere cya APD cyateguwe neza gifite imiterere ya Pt/WSe₂/Ni gifite akazi gahuye neza, kugira ngo gikemure ikibazo cy'urusaku rw'ubwiyongere bw'ishusho cya APD gisanzwe.

Itsinda ry’ubushakashatsi ryatanze igitekerezo cyo gupima urumuri rw’inkangu hashingiwe ku miterere ya Pt/WSe₂/Ni, cyabashije kubona ibimenyetso by’urumuri bike cyane ku rwego rwa fW ku bushyuhe bw’icyumba. Bahisemo ibikoresho bya semiconductor bifite imiterere ibiri WSe₂, bifite imiterere myiza y’amashanyarazi, kandi bahuza ibikoresho bya electrode ya Pt na Ni kugira ngo bakore neza ubwoko bushya bwa avalanche photodetector. Mu kunoza neza imikorere y’akazi hagati ya Pt, WSe₂ na Ni, hakozwe uburyo bwo gutwara bushobora kuziba ibikoresho byijimye mu gihe buhitamo ko ibikoresho byakozwe n’ifoto binyuramo. Ubu buryo bugabanya cyane urusaku rwinshi ruterwa no gupima urumuri rw’inkurikizi, bigatuma photodetector ibasha kubona ibimenyetso by’urumuri by’inkangu ku rwego rwo hasi cyane rw’urusaku.

Hanyuma, kugira ngo basobanure neza uburyo inkubi y’umuyaga iterwa n’imbaraga nke z’amashanyarazi, abashakashatsi babanje gusuzuma uburyo ibyuma bitandukanye bikorana na WSe₂. Hakozwe ibikoresho bitandukanye by’icyuma-semiconductor-metal (MSM) bifite electrode zitandukanye z’icyuma, kandi hakorwa ibizamini bifatika kuri byo. Byongeye kandi, mu kugabanya gukwirakwira kw’amashanyarazi mbere yuko inkubi itangira, imiterere y’ingufu ishobora kugabanuka, bityo bigabanura urusaku. Kubwibyo, hakozwe ibizamini bifatika. Kugira ngo bagaragaze neza ubushobozi bwa Pt/WSe₂/Ni APD mu bijyanye n’imiterere y’igihe, abashakashatsi basuzumye uburyo bwa -3 dB bw’igikoresho hifashishijwe agaciro gatandukanye k’ingufu z’amashanyarazi.

Ibisubizo by'igerageza bigaragaza ko detector ya Pt/WSe₂/Ni igaragaza imbaraga nke cyane zihwanye n'urusaku (NEP) ku bushyuhe bw'icyumba, ari zo 8.07 fW/√Hz gusa. Ibi bivuze ko detector ishobora kumenya ibimenyetso by'urumuri bidakomeye cyane. Byongeye kandi, iki gikoresho gishobora gukora neza ku muvuduko wa modulation wa 20 kHz hamwe n'umuvuduko mwinshi wa 5 × 10⁵, bigakemura neza ikibazo cya tekiniki cy'imashini zisanzwe zipima urumuri rw'izuba zigoye kuringaniza umuvuduko mwinshi n'umuvuduko w'ingufu. Iyi mikorere yitezweho kuyiha inyungu zikomeye mu mikoreshereze isaba umuvuduko mwinshi n'umuvuduko muto.

Ubu bushakashatsi bwerekana uruhare runini rw'ikoranabuhanga ry'ibikoresho no kunoza ikoreshwa ryabyo mu kunoza imikorere yagufotoraBinyuze mu gushushanya neza electrodes n'ibikoresho bifite imiterere ibiri, ingaruka zo kurinda ibyuma byijimye byagenzuwe, bigabanya cyane urusaku rwinshi kandi birushaho kunoza imikorere yo kumenya.

Imikorere y'iki kimenyetso ntabwo igaragarira gusa mu miterere y'amashanyarazi, ahubwo inafite amahirwe menshi yo gukoreshwa. Kubera ko gifunga neza umuriro wijimye mu bushyuhe bw'icyumba kandi kikaninjiza neza ibikoresho bikomoka ku mafoto, iki kimenyetso gikwiriye cyane mu kubona ibimenyetso by'urumuri bike mu nzego nko kugenzura ibidukikije, kureba ikirere, no gutumanaho. Ubu bushakashatsi bwagezweho ntibutanga gusa ibitekerezo bishya byo guteza imbere ibikoresho bipima foto mu buryo bworoshye, ahubwo bunatanga ibitekerezo bishya ku bushakashatsi bw'ejo hazaza no guteza imbere ibikoresho bipima foto mu buryo bworoshye kandi bufite ingufu nke.