Fiisigisteyaal ka socda Machadka Fiisigiska iyo Tiknoolajiyada ee Moscow oo ay weheliyaan asxaabtooda oo ka socda Jaamacadda Gobolka Moscow Pedagogical University iyo Jaamacadda Manchester ayaa abuuray shaybaarka shucaaca terahertz aad xasaasi u ah oo ku salaysan saamaynta tunneling ee graphene. Dhab ahaantii, transistor tunnel-ka saameyn ku leh goobta ayaa loo rogay qalab wax bare, kaas oo lagu furi karo calaamadaha "hawada", oo aan lagu gudbin wareegyada caadiga ah.
Quantum tunneling. Isha sawirka: Daria Sokol, adeegga saxaafadda MIPT
Helitaanka, oo ku salaysan fikradaha physicists Mikhail Dyakonov iyo Mikhail Shur oo la soo jeediyay horraantii 1990-meeyadii, waxay soo dhawaynaysaa xilligii tignoolajiyada terahertz wireless. Tani waxay ka dhigan tahay in xawaaraha isgaarsiinta wirelessku uu kordho marar badan, iyo radar iyo teknoolajiyada amniga, astronomy raadiyaha iyo ogaanshaha caafimaadka ayaa kor u qaadi doona heer cusub.
Fikradda physicists Ruushku waxay ahayd in transistor-ka tunnel-ka loo soo jeediyay in aan loo isticmaalin kor u qaadida calaamadaha iyo hoos u dhigista, laakiin sida qalab "kaligiis u beddela calaamadda la beddelay ee isku xigxiga ama macluumaadka codka sababtoo ah xiriirka aan tooska ahayn. inta u dhaxaysa hadda iyo danab." Si kale haddii loo dhigo, saamaynta tunnel-ku waxay ku dhici kartaa heerka signalka aad u hooseeya ee albaabka transistor-ka, kaas oo u oggolaan doona transistor-ku inuu bilaabo haddal tunneling (furan) xitaa marka laga yimaado calaamad aad daciif u ah.
Waa maxay sababta nidaamka caadiga ah ee isticmaalka transistors uusan ku habboonayn? Markaad u guurto tirada terahertz, badiyaa transistor-yada jira ma haystaan wakhti ay ku helaan kharashka loo baahan yahay, markaa wareegga raadiyaha caadiga ah ee leh cod-weyneeye signal daciif ah oo ku yaal transistor oo ay ku xigto demodulation waxay noqotaa mid aan waxtar lahayn. Waa lagama maarmaan in la hagaajiyo transistors, kaas oo sidoo kale ka shaqeeya ilaa xad, ama in la bixiyo wax gebi ahaanba ka duwan. Fiisigisyahannada Ruushka ayaa si sax ah u soo jeediyay tan "kale."
Graphene tunnel transistor sida terahertz detector. Isha sawirka: Isgaarsiinta dabeecadda
"Fikirka jawaab celinta adag ee transistor tunnel-ka ee tamarta hooseeya ayaa la ogaa ilaa shan iyo toban sano," ayuu yiri mid ka mid ah qorayaasha daraasadda, madaxa shaybaarka optoelectronics ee qalabka laba-geesoodka ah ee Xarunta Photonics. iyo Qalabka Laba-geesoodka ah ee MIPT, Dmitry Svintsov. "Annaga ka hor, qofna ma ogaanin in isla hantidan transistor-ka tunnel-ka loo isticmaali karo tignoolajiyada baaraha terahertz." Sida saynisyahannadu u dejiyeen, "haddii transistor-ku si fiican u furo oo si fiican u xiro awoodda hoose ee signalka xakamaynta, markaa waa inay sidoo kale ku fiicnaato in la soo qaado signal daciif ah hawada."
Tijaabada, oo lagu sifeeyay joornaalka Nature Communications, transistor tunnel ayaa lagu sameeyay graphene bilayer. Tijaabadu waxay muujisay in dareenka aaladda ee habka tunnel-ka uu yahay dhowr amar oo ka sarreeya kan habka gaadiidka qadiimiga ah. Markaa, qalabka wax baaraha ee transistor-ka tijaabada ah wuxuu u rogay inuusan ka xumaanin dareenka marka loo eego kuwa la midka ah ee superconductor iyo bolometers semiconductor ee laga heli karo suuqa. Aragtidu waxay soo jeedinaysaa in graphene-ka saafiga ah, ay sare u kacdo dareenka, taas oo aad uga badan awoodda qalabka casriga ah ee terahertz, tani ma aha horumar, laakiin kacaanka warshadaha.
Source: 3dnews.ru