Kaminuza ya Peking yabonye isoko rya laser rikomeza rya perovskite ringana na mikoro kare imwe

Kaminuza ya Peking yabonye uburyo bwo gukora perovskite bukomejeisoko ya laserntoya kurusha mikoro kare imwe
Ni ngombwa kubaka isoko ya laser ihoraho ifite ubuso buri munsi ya 1μm2 kugira ngo ihuze n'ikoreshwa ry'ingufu nke zo guhuza optique kuri on-chip (<10 fJ bit-1). Ariko, uko ingano y'igikoresho igabanuka, igihombo cy'amatara n'ibikoresho kiriyongera cyane, bityo kugera ku bunini bw'igikoresho cya sub-micron no gukomeza gusohora amasoko ya laser ni ingorabahizi cyane. Mu myaka ya vuba aha, ibikoresho bya halide perovskite byibanzweho cyane mu rwego rwa laser ihoraho ikoreshwa na optique bitewe n'ubwiyongere bwayo bw'amatara n'imiterere yihariye ya exciton polariton. Agace k'ibikoresho bya laser ihoraho ya perovskite ivugwa kugeza ubu karacyari hejuru ya 10μm2, kandi amasoko ya laser ya submicron yose akeneye urumuri rukoresha pulse rufite ubucucike bwinshi bw'ingufu za pompe kugira ngo ikoreshwe.

Mu gusubiza iki kibazo, itsinda ry’abashakashatsi rya Zhang Qing wo mu Ishuri ry’Ubumenyi bw’Ibikoresho n’Ubwubatsi rya Kaminuza ya Peking ryateguye neza ibikoresho bya perovskite submicron single crystal bya perovskite kugira ngo haboneke amasoko ya laser ikomeza gusohora optique ifite ubuso bwa 0.65μm2. Muri icyo gihe, fotoni iragaragara. Uburyo bwa exciton polariton muri submicron bukomeza gusohora optique burumvikana cyane, butanga igitekerezo gishya cyo guteza imbere lasers ntoya zo mu bwoko bwa low threshold semiconductor. Ibisubizo by’ubushakashatsi, byiswe “Continuous Wave Pumped Perovskite Lasers ifite Ubuso bw’Igikoresho buri munsi ya 1μm2,” biherutse gusohoka mu bitabo by’Ibintu Bigezweho.

Muri iki gikorwa, urupapuro rwa micron imwe ya perovskite CsPbBr3 rudafite umwimerere rwateguwe ku butaka bwa safiro hakoreshejwe uburyo bwa chemical vapor deposition. Byagaragaye ko guhuza gukomeye kwa perovskite excitons na fotoni za microcavity ku rukuta rw'amajwi ku bushyuhe bw'icyumba byatumye habaho polariton ya excitonic. Binyuze mu bimenyetso bitandukanye, nko kuba impagarara y'ibyuka biva ku murongo umwe kugeza ku utari umurongo umwe, ubugari bw'umurongo muto, impinduka ya polarization y'ibyuka n'impinduka mu guhuza imiterere y'ahantu ku mupaka, haremezwa fluorescence lase ikomeza gukoreshwa ya kristalu imwe ya CsPbBr3 ifite ingano nto ya micron, kandi ubuso bw'igikoresho buri hasi ya 0.65μm2. Muri icyo gihe, byagaragaye ko umupaka w'isoko ya laser ya submicron ugereranywa n'uw'isoko ya laser nini, ndetse ushobora no kuba munsi (Ishusho ya 1).

Ishusho ya 1. Submicron CsPbBr3 ipompa ubudahwemaisoko y'urumuri rwa laser

Byongeye kandi, iki gikorwa gisuzuma haba mu bushakashatsi no mu buryo bw'imitekerereze, kandi kigaragaza uburyo excitons za exciton-polarized exciton zikoreshwa mu gushyira mu bikorwa amasoko ya laser ihoraho ya submicron. Guhuza photon-exciton muri submicron perovskites bitera kwiyongera gukomeye kwa refractive index kuri 80, ibyo bikaba byongera cyane uburyo bwo kongera ubushobozi bwo kwishyura igihombo cya mode. Ibi kandi bituma habaho isoko ya laser ya perovskite submicron ifite ubushobozi bwo hejuru bwo gukora microcavity quality factor hamwe n'ubugari bw'umuyoboro muto (Ishusho ya 2). Iyi nzira kandi itanga ubumenyi bushya ku iterambere rya lasers ntoya, zo hasi zishingiye ku bindi bikoresho bya semiconductor.

Ishusho ya 2. Uburyo bwo gukoresha isoko ya laser ya sub-micron hakoreshejwe polarizons za excitonic

Song Jiepeng, umunyeshuri wa Zhibo wo mu 2020 wo mu Ishuri ry’Ubumenyi bw’Ibikoresho n’Ubwubatsi rya Kaminuza ya Peking, ni we wanditse iyi nyandiko bwa mbere, naho Kaminuza ya Peking ikaba ari yo ya mbere muri iyi nyandiko. Zhang Qing na Xiong Qihua, umwarimu wa Fiziki muri Kaminuza ya Tsinghua, ni bo banditsi bajyanye nayo. Iki gikorwa cyatewe inkunga n’Ikigo cy’Igihugu cy’Ubumenyi bw’Icyaro cy’Ubushinwa n’Ikigo cy’Ubumenyi bw’Icyaro cya Beijing ku rubyiruko rw’indashyikirwa.