Peking University pom tau hais tias perovskite tsis tu ncualaser qhov chawme dua 1 square micron
Nws yog ib qho tseem ceeb los tsim ib lub laser txuas ntxiv nrog rau thaj chaw ntaus ntawv tsawg dua 1μm2 kom tau raws li qhov xav tau ntawm kev siv hluav taws xob tsawg ntawm on-chip optical interconnection (<10 fJ bit-1).Txawm li cas los xij, raws li qhov loj me ntawm cov cuab yeej txo qis, kho qhov muag thiab cov khoom poob nce ntxiv, yog li kev ua tiav cov khoom siv me me me me thiab txuas txuas kho qhov muag ntawm cov khoom siv laser yog qhov nyuaj heev.Nyob rau hauv xyoo tas los no, halide perovskite cov ntaub ntawv tau txais kev saib xyuas nyob rau hauv lub tshav pob ntawm kev nruam optically pumped lasers vim lawv qhov siab optical nce thiab cov khoom tshwj xeeb exciton polariton.Cov cuab yeej siv ntawm perovskite txuas ntxiv laser qhov chaw qhia txog tam sim no tseem ntau dua 10μm2, thiab submicron laser qhov chaw txhua tus xav tau lub teeb pom kev zoo nrog lub zog siab zog kom txhawb nqa.
Hauv kev teb rau qhov kev sib tw no, pawg tshawb fawb ntawm Zhang Qing los ntawm Lub Tsev Kawm Ntawv ntawm Cov Khoom Siv Tshawb Fawb thiab Engineering ntawm Peking University tau ua tiav zoo npaj cov khoom siv zoo perovskite submicron ib leeg siv lead ua kom ua tiav cov khoom siv kho qhov muag txuas ntxiv mus rau laser qhov chaw nrog cov cuab yeej thaj tsam tsawg li 0.65μm2.Nyob rau tib lub sijhawm, lub photon tau tshwm sim.Lub tshuab ntawm exciton polariton nyob rau hauv submicron nruam optically pumped lasing txheej txheem yog nkag siab tob, uas muab ib lub tswv yim tshiab rau kev loj hlob ntawm me me me me qhov pib semiconductor lasers.Cov txiaj ntsig ntawm txoj kev tshawb fawb, hu ua "Nruam Wave Pumped Perovskite Lasers nrog Cov Cuab Yeej Siv Hauv Qab 1 μm2," tsis ntev los no tau tshaj tawm hauv Cov Khoom Siv Siab.
Hauv kev ua haujlwm no, inorganic perovskite CsPbBr3 ib daim ntawv siv lead ua micron tau npaj rau ntawm sapphire substrate los ntawm cov tshuaj vapor deposition.Nws tau pom tias qhov sib txuas muaj zog ntawm perovskite excitons nrog lub suab phab ntsa microcavity photons ntawm chav tsev kub ua rau tsim cov excitonic polariton.Los ntawm cov ntaub ntawv pov thawj, xws li linear mus rau nonlinear emission siv, nqaim kab dav, emission polarization transformation thiab spatial coherence transformation ntawm qhov pib, qhov nruam optically pumped fluorescence lase ntawm sub-micron-sized CsPbBr3 ib leeg siv lead ua tau lees paub, thiab thaj chaw ntaus ntawv. yog tsawg li 0.65μm2.Nyob rau tib lub sijhawm, nws tau pom tias qhov pib ntawm submicron laser qhov chaw yog piv rau qhov loj-loj laser qhov chaw, thiab tuaj yeem qis dua (Daim duab 1).
Daim duab 1. Nruam optically pumped submicron CsPbBr3laser qhov chaw
Tsis tas li ntawd, txoj haujlwm no tshawb nrhiav ob qho tib si sim thiab theoretically, thiab nthuav tawm cov txheej txheem ntawm exciton-polarized excitons hauv kev ua tiav ntawm submicron nruam laser qhov chaw.Kev txhim kho photon-exciton coupling hauv submicron perovskites ua rau muaj kev nce ntxiv hauv cov pab pawg refractive index txog li 80, uas ua rau muaj txiaj ntsig ntau ntxiv rau hom kev nce nyiaj kom them rau cov kev poob.Qhov no kuj ua rau perovskite submicron laser qhov chaw uas muaj qhov zoo dua microcavity zoo thiab qhov nqaim emission linewidth (Daim duab 2).Lub tshuab tseem muab cov kev nkag siab tshiab rau hauv kev txhim kho ntawm me me, qis-threshold lasers raws li lwm yam khoom siv semiconductor.
Daim duab 2. Mechanism ntawm sub-micron laser qhov chaw siv excitonic polarizons
Song Jiepeng, 2020 Zhibo cov tub ntxhais kawm los ntawm Lub Tsev Kawm Ntawv ntawm Cov Khoom Siv Tshawb Fawb thiab Engineering ntawm Peking University, yog thawj tus sau ntawv, thiab Peking University yog thawj chav tsev ntawm daim ntawv.Zhang Qing thiab Xiong Qihua, tus xibfwb ntawm Physics ntawm Tsinghua University, yog tus sau phau ntawv.Txoj haujlwm tau txais kev txhawb nqa los ntawm National Natural Science Foundation ntawm Tuam Tshoj thiab Beijing Science Foundation rau Cov Tub Ntxhais Hluas.
Post lub sij hawm: Sep-12-2023