Isi nshya y'ibikoresho by'ikoranabuhanga bikoreshwa mu buryo bwa optoelectronic

Isi nshya yaibikoresho by'ikoranabuhanga

Abashakashatsi bo mu kigo cy’ikoranabuhanga cya Technion-Israel bakoze ubushakashatsi buhamye ku mikorere yacyolaser y'amasohashingiwe ku gice kimwe cya atome. Ubu buvumbuzi bwashobotse kubera imikoranire ishingiye ku ruziga hagati y’urwego rumwe rwa atome n’urukiramende rw’urukiramende rufite imiterere itambitse, rushyigikira ikibaya cya high-Q spin binyuze mu gutandukanya fotoni zo mu bwoko bwa Rashaba mu buryo bwa spin ya fotoni z’ibihugu bifatanye mu buryo burambuye.
Ibisubizo byasohotse muri Nature Materials kandi byagaragajwe mu nyandiko y’ubushakashatsi, bitanga inzira yo kwiga ibintu bifitanye isano n’umuzunguruko mu buryo bwa kera no musisitemu za quantum, kandi bifungura inzira nshya z’ubushakashatsi bw’ibanze n’ikoreshwa rya electron na fotoni mu bikoresho bya optoelectronic. Isoko ya spin optique ihuza uburyo bwa photon na transition ya electron, itanga uburyo bwo kwiga ihererekanya ry’amakuru ya spin hagati ya electron na fotoni no guteza imbere ibikoresho bya optoelectronic bigezweho.

Uduce duto tw’urumuri rw’izuba two mu kibaya cya Spin tuba twubatswe hakoreshejwe uburyo bwa “photonic spin lattices” hamwe n’uburyo bwa “inversion asymmetry” (akarere k’umuhondo) n’uburyo bwa “inversion symmetry” (akarere ka “cyan cladding”.
Kugira ngo hubakwe aya masoko, ikintu cy'ingenzi ni ukurandura ikibazo cyo kugabanuka k'umuvuduko hagati y'imiterere ibiri itandukanye ya fotoni cyangwa electroni. Ibi bikunze kugerwaho hakoreshejwe imbaraga za rukuruzi munsi ya Faraday cyangwa Zeeman effect, nubwo ubu buryo busanzwe busaba imbaraga za rukuruzi zikomeye kandi ntizishobora gukora microsource. Ubundi buryo bwiza ni ugushingira kuri sisitemu ya kamera ikoresha imbaraga za rukuruzi z'ubukorano kugira ngo ikore imiterere ya fotoni zigabanye mu mwanya w'umuvuduko.
Ikibabaje ni uko ibyagaragaye mbere ku birebana n’imiterere y’igabanywa ry’ibintu bya spin byashingiye cyane ku buryo bwo gukwirakwiza ibintu bifite uburemere buke, bushyiraho imbogamizi mbi ku buryo amasoko y’ahantu n’igihe ahurirana. Ubu buryo bubangamiwe kandi n’imiterere y’ibikoresho bigenzura imikorere ya laser, bidashobora gukoreshwa cyangwa bidashobora gukoreshwa mu kugenzura neza.amasoko y'urumuricyane cyane iyo nta ngufu za rukuruzi zihari ku bushyuhe bw'icyumba.
Kugira ngo bagere ku miterere ya high-Q spin-splitting, abashakashatsi bakoze lattice za fotonique spin zifite symmetries zitandukanye, harimo core ifite inversion asymmetry na inversion symmetric envelope ihujwe na WS2 single layer, kugira ngo habeho spin valleys ifite straightener straightener. Lattice y'ibanze inversion asymmetric yakoreshejwe n'abashakashatsi ifite imiterere ibiri y'ingenzi.
Vektori ya lattice igenzurwa iterwa n’impinduka mu mwanya w’ikimenyetso cy’imiterere y’uturemangingo dutandukanye tw’uturemangingo duto duto twa anisotropic. Iyi vektori igabanya umugozi wo kwangirika kw’uturemangingo mo amashami abiri ya spin-polarized mu mwanya w’impinduka, izwi nka photonic Rushberg effect.
Imiterere ibiri ya Q symmetric (quasi) ifatanye mu gice cy’umubumbe, ari cyo ±K (Brillouin band Angle) photon spin valleys ku nkengero z’amashami agabanyamo uduce, ikora superposition ihuje amplitude.
Porofeseri Koren yagize ati: “Twakoresheje monolide za WS2 nk'ibikoresho byo gukusanya umusaruro kuko iyi disulfide y'icyuma ihinduka mu buryo butaziguye ifite uburyo bwihariye bwo guhindagurika kw'ikirahure kandi yizweho cyane nk'uburyo bwo gutwara amakuru mu electron zo mu kibaya. By'umwihariko, excitons zabo za ±K 'valley (zitanga urumuri mu buryo bwa planar spin-polarized dipole emitters) zishobora gukururwa n'urumuri rwa spin-polarized hakurikijwe amategeko agenga igereranya ry'ikirahure, bityo zigagenzura cyane izenguruka ryigenga rya magnetique.isoko y'amaso.
Muri microcavity ya spin valley ifite urwego rumwe, excitons za ±K 'valley zihuzwa na ±K spin valley state binyuze mu guhuza polarization, kandi spin exciton laser ku bushyuhe bw'icyumba igerwaho binyuze mu gutanga urumuri rwinshi. Muri icyo gihe,laserUburyo butuma ikirere cya ±K 'valley excitons kidakoresha phase-in-phase mbere kugira ngo gishake imiterere y'igihombo gito cya sisitemu no kongera gushyiraho isano ya lock-in ishingiye ku gice cya geometrike kiri imbere y'ikibaya cya ±K spin.
Ubwumvikane bw'ikibaya buterwa n'ubu buryo bwa laser bukuraho gukenera kugabanya ubushyuhe buke bwo gukwirakwira kw'ikirere. Byongeye kandi, imiterere y'igihombo gito cya laser ya Rashba monolayer ishobora guhindurwa hakoreshejwe polarization ya pompe igororotse (uruziga), itanga uburyo bwo kugenzura ubukana bwa laser n'ubwumvikane bw'ahantu.
Porofeseri Hasman asobanura agira ati: “IbyahishuwefotonikeImpuzandengo ya Rashba itanga uburyo rusange bwo kubaka amasoko y’urumuri asohora ubuso. Ubwumvikane bw’urumuri bugaragazwa mu gice kimwe cy’urumuri rw’urumuri rw’urumuri rw’urumuri rw’urumuri butuma tugera ku ntambwe imwe yo kugera ku guhurirana kw’amakuru ya quantum hagati y’ibice bya ±K mu kibaya binyuze muri qubits.
Itsinda ryacu rimaze igihe kinini rikora optike ya spin, rikoresha fotoni spin nk'igikoresho cyiza cyo kugenzura imyitwarire y'imiraba ya electromagnetic. Mu 2018, dushishikajwe n'izunguruka ry'ikibaya mu bikoresho bifite imiterere ibiri, twatangiye umushinga w'igihe kirekire wo gusuzuma uburyo amasoko ya optike ya spin mu rugero rwa atome akoreshwa mu gihe nta ngufu za rukuruzi zihari. Dukoresha icyitegererezo cya Berry phase defect kidashingiye ku gace runaka kugira ngo dukemure ikibazo cyo kubona urwego rw'ubuhanga ruhuza imiterere y'ikibaya kimwe.
Ariko, bitewe n’uko nta buryo bukomeye bwo guhuza hagati y’ibitaramo, uburyo bw’ibanze bwo gushyira hamwe ibitaramo byinshi byo mu kibaya mu isoko y’urumuri rwa Rashuba rw’icyiciro kimwe bumaze kugerwaho ntiburakemuka. Iki kibazo kidushishikariza gutekereza ku gishushanyo cya Rashuba cya fotoni nyinshi za Q. Nyuma yo guhanga udushya mu buryo bushya bw’umubiri, twashyize mu bikorwa laser ya Rashuba y’icyiciro kimwe yavuzwe muri iyi nyandiko.”
Iyi ntambwe itegura inzira yo kwiga ibijyanye n’imikoranire y’ibintu bihuza imiterere y’ubucukumbuzi mu buryo bwa kera na bwa quantum, kandi igafungura uburyo bushya bw’ubushakashatsi bw’ibanze n’ikoreshwa ry’ibikoresho bya spintronic na photonic optoelectronic.