Ubushakashatsi buheruka bwakozwe ku gikoresho gipima inkombe z'amazi

Ubushakashatsi buheruka bwaicyuma gipima imiterere y'inkangu

Ikoranabuhanga ryo gupima infrared rikoreshwa cyane mu bushakashatsi bwa gisirikare, gukurikirana ibidukikije, gusuzuma indwara n'ibindi. Ibikoresho bisanzwe byo gupima infrared bifite imbogamizi mu mikorere, nko kumenya uburyo bwo kumenya, umuvuduko w'uburyo bwo gusubiza n'ibindi. Ibikoresho bya InAs/InAsSb Class II superlattice (T2SL) bifite imiterere myiza y'amashanyarazi n'uburyo bwo guhindura, bigatuma biba byiza ku bikoresho byo gupima infrared by'amabara maremare (LWIR). Ikibazo cyo kumenya infrared y'amabara maremare kimaze igihe kinini gihangayikishije, ibyo bikaba bigabanya cyane uburyo ibikoresho by'ikoranabuhanga byizewe. Nubwo ibikoresho byo gupima infrared by'amabara maremare (avalanche photodetector)APD ipima foto) ifite ubushobozi bwo gusubiza neza, ihura n'umuraba mwinshi wijimye mu gihe cyo gukuba.

Kugira ngo bikemure ibi bibazo, itsinda ryaturutse muri Kaminuza y’Ubumenyi n’Ikoranabuhanga rya Electronic Science and Technology mu Bushinwa ryakoze neza igishushanyo mbonera cy’ubushyuhe bw’inkuba ya infrared yo mu cyiciro cya kabiri (T2SL) ifite imikorere myiza cyane. Abashakashatsi bakoresheje igipimo cyo hasi cyo kongeramo icyuma gifata InAs/InAsSb T2SL kugira ngo bagabanye umuvuduko w’amazi wijimye. Muri icyo gihe, AlAsSb ifite agaciro ka k gake ikoreshwa nk’urwego rwo gukuba kugira ngo igabanye urusaku rw’ibikoresho mu gihe ikomeza kwiyongera bihagije. Iki gishushanyo gitanga igisubizo cyiza cyo guteza imbere iterambere ry’ikoranabuhanga ryo gutahura infrared yo mu majyaruguru. Iki gishushanyo gikoresha igishushanyo cy’intambwe, kandi binyuze mu guhindura imiterere ya InAs na InAsSb, ihinduka ry’imiterere y’umugozi riragerwaho, kandi imikorere ya kipima irarushaho kuba myiza. Mu bijyanye no guhitamo ibikoresho no gutegura, ubu bushakashatsi busobanura mu buryo burambuye uburyo bwo gukura n’ibipimo by’imikorere bya InAs/InAsSb T2SL byakoreshejwe mu gutegura kipima imvura. Kumenya imiterere n’ubugari bwa InAs/InAsSb T2SL ni ingenzi kandi guhindura ibipimo birakenewe kugira ngo habeho kuringaniza stress. Mu rwego rwo kumenya infrared y’urumuri rurerure, kugira ngo hagerwe ku rugero rumwe n’urwa InAs/GaSb T2SL, hakenewe igihe kimwe cya InAs/InAsSb T2SL gikomeye. Ariko, igihe kimwe kinini gitera kugabanuka k’uburyo bwo kwinjiza mu cyerekezo cyo gukura no kwiyongera k’ubunini bw’imyobo muri T2SL. Byagaragaye ko kongeramo igice cya Sb bishobora gutuma uburebure bw’urumuri rurerure butarimo kongera cyane ubunini bw’igihe kimwe. Ariko, imiterere myinshi ya Sb ishobora gutuma ibice bya Sb bitandukana.

Bityo, InAs/InAs0.5Sb0.5 T2SL hamwe n'itsinda rya Sb 0.5 ryatoranyijwe nk'urwego rukora rwa APDicyuma gipima fotoInAs/InAsSb T2SL ikura cyane cyane ku bice bya GaSb, bityo uruhare rwa GaSb mu gucunga strain rugomba kwitabwaho. Mu by'ukuri, kugera ku kuringaniza strain bikubiyemo kugereranya impuzandengo ya lattice ya superlattice mu gihe kimwe n'ingufu ya lattice ya substrate. Muri rusange, strain ya tensile muri InAs yishyurwa n'ingufu yashyizwemo na InAsSb, bigatuma InAsSb iba nini kurusha urwego rwa InAsSb. Ubu bushakashatsi bwapimye imiterere y'ifoto y'icyuma gipima inkungu, harimo igisubizo cya spectral, dark current, urusaku, nibindi, kandi bwemeza imikorere y'urwego rwa gradient. Ingaruka zo gukuba inkungu za avalanche photodetector zirasesengurwa, kandi isano iri hagati y'ikintu cyo gukuba n'imbaraga z'urumuri rw'impanuka, ubushyuhe n'ibindi biraganirwaho.

ISHUSHO (A) Ishusho y'icyerekezo cy'icyuma gipima ikirere cya InAs/InAsSb gifite infrarouge ndende cya infrarouge APD; (B) Ishusho y'icyerekezo cy'amashanyarazi kuri buri cyiciro cya APD.