Waxqabadka sare iskiis u wadosawirqaade infrared
infraredsawirqaadewaxay leedahay sifooyin awood xoog leh oo ka-hortagga faragelinta, awoodda aqoonsiga bartilmaameedka xooggan, hawlgalka hawada oo dhan iyo qarinta wanaagsan. Waxay ka ciyaareysaa door muhiim ah oo sii kordheysa oo ku saabsan dhinacyada sida caafimaadka, militariga, tignoolajiyada hawada sare iyo injineernimada deegaanka. Waxaa ka mid ah, kuwa iskood isu wataogaanshaha korantadaChip oo si madaxbanaan u shaqayn kara iyada oo aan lahayn koronto dheeri ah oo dibadda ah ayaa soo jiidatay dareenka ballaaran ee goobta ogaanshaha infrared sababtoo ah waxqabadkiisa gaarka ah (sida madaxbannaanida tamarta, dareenka sare iyo xasilloonida, iwm.). Taa bedelkeeda, jajabyada ogaanshaha sawir-qaadista ee dhaqameed, sida silikoon-ku-saleysan ama narrowbandgap semiconductor-ku-saleysan chips infrared, ma aha oo kaliya waxay u baahan yihiin koronto dheeri ah si ay u kaxeeyaan kala-soocida sideyaasha sawir-qaadista si ay u soo saaraan sawir-qaadaha, laakiin sidoo kale waxay u baahan yihiin habab qaboojin dheeraad ah si loo yareeyo dhawaaqa kulaylka loona hagaajiyo ka jawaabista. Sidaa darteed, way adagtahay in la buuxiyo fikradaha cusub iyo shuruudaha jiilka soo socda ee jajabyada ogaanshaha infrared mustaqbalka, sida isticmaalka tamarta yar, cabbir yar, kharash yar iyo waxqabadka sare.
Dhawaan, kooxaha cilmi-baarista ee Shiinaha iyo Iswiidhan ayaa soo jeediyay pin heterojunction novel pin heterojunction is-driven infrared infrared (SWIR) qalabka wax lagu ogaado oo ku salaysan graphene nanoribbon (GNR) filimada / alumina / silikoon crystal crystal. Marka la eego saameynta isku dhafan ee saameynta gating indhaha ee ay kicisay is-dhexgalka kala duwan iyo beerta korontada ku dhex dhisan, chip-ku wuxuu muujiyay jawaab-celin aad u sarreeya iyo waxqabadka ogaanshaha ee eber eexda. Chip-ka ogaanshaha korontadu waxa uu leeyahay heerka jawaab celinta oo ah 75.3 A/W oo ah qaabka is-wada, heerka ogaanshaha ee 7.5 × 10¹⁴ Jones, iyo waxtarka tirada dibadda ee ku dhow 104%, iyada oo hagaajinaysa waxqabadka ogaanshaha isla nooca chips-ku-saleysan silikoon iyada oo la diiwaan geliyay 7 dalab oo cabbir ah. Intaa waxaa dheer, marka la eego habka wadista caadiga ah, heerka jawaabta chip-ka, heerka ogaanshaha, iyo waxtarka tirada dibadda ayaa dhamaantood aad u sarreeya sida 843 A/W, 10¹⁵ Jones, iyo 105% siday u kala horreeyaan, kuwaas oo dhammaantood ah qiyamka ugu sarreeya ee laga soo sheegay cilmi-baarista hadda. Dhanka kale, cilmi-baaristan ayaa sidoo kale muujisay codsiga dhabta ah ee adduunka dhabta ah ee qalabka wax lagu ogaanayo ee sawir-qaadista ee dhinacyada isgaarsiinta indhaha iyo sawir-qaadista infrared, taas oo muujinaysa awooddeeda weyn ee codsiga.
Si si nidaamsan loogu daraaseeyo waxqabadka sawir-qaade ee sawir-qaade ee ku salaysan graphene nanoribbons /Al₂O₃/ silikoon-kaliya, cilmi-baarayaashu waxay tijaabiyeen meesheeda taagan (qallooca korantada hadda) iyo jawaabaha dabeecadda firfircoon (qallooca-waqtiga hadda). Si si nidaamsan loo qiimeeyo sifooyinka jawaabta indhaha ee graphene nanoribbon / Al₂O₃/ monocrystalline silicon heterostructure photodetector hoos yimaada danabyo eexasho kala duwan, cilmi-baarayaashu waxay cabbireen jawaabta firfircoon ee hadda jirta ee 0 V, -1 V, -3 V iyo -5 V eexda, oo leh cufnaanta awoodda indhaha ee 8.μW². Sawirka hadda socda wuxuu ku kordhaa eexda gadaal ka ah oo waxay tuseysaa xawaare jawaab celin degdeg ah dhammaan danabyada eexda.
Ugu dambeyntii, cilmi-baarayaashu waxay sameeyeen nidaam sawir-qaadis waxayna si guul leh u heleen sawir-qaadis is-xakameyn ah oo ah infrared-gaaban. Nidaamku wuxuu ku shaqeeyaa eex eber ah oo aan lahayn wax tamar ah gabi ahaanba. Awoodda sawir-qaade ee sawir-qaade ayaa lagu qiimeeyay iyadoo la adeegsanayo maaskaro madow oo leh qaabka xarafka "T" (sida ku cad sawirka 1).
Gebagebadii, cilmi-baadhistan ayaa si guul leh u been-abuurtay sawir-qaadayaal iskood u shaqaynaya oo ku salaysan graphene nanoribbons waxayna gaadheen rikoodh jabin heersare ah oo jawaab celin ah. Dhanka kale, cilmi-baarayaashu waxay si guul leh u muujiyeen isgaarsiinta indhaha iyo awoodaha sawir-qaadista ee tansawirqaade aad u jawaaba. Guusha cilmi-baaristan kaliya ma bixiso hab wax ku ool ah oo loogu talagalay horumarinta nanoribbons graphene iyo aaladaha optoelectronic-ku-saleysan ee silikoon, laakiin sidoo kale waxay muujineysaa waxqabadkooda ugu wanaagsan sida sawir-qaadayaasha mowjadaha gaaban ee iskood u shaqeysta.
Waqtiga boostada: Abriil-28-2025