Kaminuza ya Peking yatahuye perovskite ikomeza laser isoko ntoya ya metero kare 1

Kaminuza ya Peking yatahuye perovskite ikomezaInkomokontoya kuruta micron kare 1
Ni ngombwa kubaka isoko ikomeza ya laser hamwe nubuso bwibikoresho bitarenze 1μm2 kugirango byuzuze ingufu nke zikenerwa kuri on-chip optique ihuza (<10 fJ bit-1). Nyamara, uko ubunini bwibikoresho bugabanuka, igihombo cya optique nibikoresho byiyongera cyane, bityo kugera kubunini bwibikoresho bya sub-micron hamwe no kuvoma optique yo kuvoma isoko ya laser biragoye cyane. Mu myaka yashize, ibikoresho bya halide perovskite byitabiriwe cyane mubijyanye na lazeri ikomeza kuvomerwa neza kubera inyungu nyinshi za optique hamwe na exciton polariton idasanzwe. Agace k'ibikoresho bya perovskite ikomeza ya lazeri yatanzwe kugeza ubu iracyari hejuru ya 10μm2, kandi amasoko ya lazeri ya subicron byose bisaba urumuri rwinshi rufite ingufu nyinshi za pompe kugirango zishishikarize.

Mu gusubiza iki kibazo, itsinda ry’ubushakashatsi rya Zhang Qing wo mu Ishuri Rikuru ry’ibikoresho bya siyansi n’ubuhanga muri kaminuza ya Peking ryateguye neza ibikoresho bya perovskite submicron yo mu rwego rwo hejuru kugira ngo bigere ku masoko ya optique yo kuvoma laser hamwe n’ibikoresho biri munsi ya 0,65μm2. Mugihe kimwe, fotone iragaragara. Uburyo bwa exciton polariton muri submicron ikomeza kuvoma neza uburyo bwo guswera bwarasobanutse neza, butanga igitekerezo gishya cyiterambere ryiterambere rito rito ritoya ya semiconductor lazeri. Ibyavuye mu bushakashatsi byiswe “Gukomeza Umuhengeri wa Perovskite Lasers hamwe na Device Agace munsi ya 1 μ m2,” biherutse gusohoka mu bikoresho bigezweho.

Muri uyu murimo, urupapuro rwa mikorobe idasanzwe ya CsPbBr3 rwateguwe kuri microfone ya kirisiti ya kirisiti yateguwe kuri substrate ya safiro hakoreshejwe imyuka ya chimique. Byagaragaye ko guhuza imbaraga za perovskite hamwe na fotone ya microcavity yurukuta rwamajwi yubushyuhe bwicyumba byatumye habaho polariton ya excitonic. Binyuze murukurikirane rwibimenyetso, nkumurongo ugana ubukana bwumuriro utari umurongo, ubugari bwumurongo muto, guhindura imyuka ihumanya ikirere hamwe no guhuza imiterere ihindagurika ku mbibi, ikomeza kuvoma neza fluorescence lase ya sub-micron-nini ya CsPbBr3 kristu imwe iremezwa, kandi agace k'ibikoresho ni munsi ya 0,65μm2. Muri icyo gihe, byagaragaye ko imbago y’isoko ya subicron laser yagereranywa niy'isoko rinini rinini, kandi rishobora no kuba hasi (Ishusho 1).

Igishushanyo 1. Gukomeza kuvoma neza subicron CsPbBr3isoko yumucyo

Byongeye kandi, iki gikorwa kirasesengura haba mubigeragezo no mubitekerezo, kandi kigaragaza uburyo bwa exciton-polarized excitons mugutahura inkomoko ya lazeri ikomeza. Kwiyongera kwa foton-exciton guhuza muri submicron perovskites bivamo kwiyongera gukabije kwitsinda ryitsinda ryitsinda rigera kuri 80, ibyo bikaba byongera cyane uburyo bwo kwishyura kugirango bishyure igihombo cyuburyo. Ibi kandi bivamo perovskite submicron laser isoko hamwe nibintu byiza byingirakamaro bya microcavity hamwe numurongo mugari wohereza imyanda (Ishusho 2). Ubwo buryo kandi butanga ubumenyi bushya mu iterambere ry’ubunini buto, buke-buke buke bushingiye ku bindi bikoresho bya semiconductor.

Igishushanyo cya 2. Uburyo bwa sub-micron laser isoko ukoresheje polaritike ya excitonic

Indirimbo Jiepeng, umunyeshuri wa Zhibo wa 2020 wo mu Ishuri ry’ibikoresho bya siyansi n’ubuhanga muri kaminuza ya Peking, ni we mwanditsi wa mbere w’uru rupapuro, naho kaminuza ya Peking ni igice cya mbere cy’impapuro. Zhang Qing na Xiong Qihua, umwarimu wa fiziki muri kaminuza ya Tsinghua, ni abanditsi bahuye. Akazi katewe inkunga na Fondation National Science Science y'Ubushinwa hamwe na Fondasiyo ya siyanse ya Beijing ku rubyiruko rudasanzwe.