Peking University yakaona perovskite inoendereralaser sourceidiki pane 1 square micron
Zvakakosha kuvaka inoenderera mberi laser sosi ine mudziyo nharaunda isingasviki 1μm2 kusangana nekushomeka kwesimba rekushandisa zvinodiwa pa-chip optical interconnection (<10 fJ bit-1). Nekudaro, sezvo saizi yemudziyo inodzikira, kurasikirwa kwemaziso uye kwezvinhu kunowedzera zvakanyanya, saka kuwana sub-micron mudziyo saizi uye kuenderera mberi kwekupomba kwema laser masosi kunonetsa. Mumakore achangopfuura, halide perovskite zvinhu zvakawana kutariswa kwakawanda mumunda wekuenderera mberi optically pumped lasers nekuda kweiyo yakakwirira Optical kuwana uye yakasarudzika exciton polariton zvivakwa. Iyo nzvimbo yemudziyo ye perovskite inoenderera mberi laser masosi yakashumwa kusvika parizvino ichiri yakakura kupfuura 10μm2, uye submicron laser masosi ese anoda pulsed mwenje ine yakakwira pombi simba density kuti isimudzire.
Mukupindura dambudziko iri, boka rekutsvagisa raZhang Qing kubva kuSchool of Materials Science uye Injiniya yePeking University yakabudirira kugadzirira yepamusoro perovskite submicron single crystal materials kuti iwane inoenderera mberi optical pumping laser sources ine mudziyo nharaunda yakaderera se0.65μm2. Panguva imwecheteyo, iyo photon inoratidzwa. Iyo nzira ye exciton polariton mu submicron inoenderera optically pumped lasing process inonzwisiswa zvakadzika, iyo inopa pfungwa nyowani yekuvandudza diki saizi yakaderera chikumbaridzo semiconductor lasers. Zvigumisiro zvekudzidza, zvakanzi "Kuenderera mberi Wave Pumped Perovskite Lasers neDevice Area Pazasi 1 μm2," ichangobva kubudiswa mu Advanced Materials.
Mune basa iri, iyo inorganic perovskite CsPbBr3 single crystal micron sheet yakagadzirwa pasafire substrate nemakemikari vapor deposition. Yakaonekwa kuti kubatanidzwa kwakasimba kwe perovskite excitons neruzha rusvingo microcavity photons pakushambidzika kwekamuri kwakaguma nekuumbwa kwe excitonic polariton. Kuburikidza nenhevedzano yehumbowo, senge mutsara kune isina mutsara emission intensity, nhete mutsara wakafara, emission polarization shanduko uye spatial coherence shanduko pachikumbaridzo, iyo inoenderera inopomba fluorescence laser ye-sub-micron-saizi CsPbBr3 single crystal inosimbiswa, uye nzvimbo yemuchina. yakaderera se 0.65μm2. Panguva imwecheteyo, zvakaonekwa kuti chikumbaridzo cheiyo submicron laser sosi inofananidzwa neiyo yakakura-saizi laser sosi, uye inogona kunyange kuderera (Mufananidzo 1).
Mufananidzo 1. Kuenderera mberi optically pumped submicron CsPbBr3laser light source
Kupfuurirazve, basa iri rinoongorora zvese kuyedza uye ne theoretically, uye rinoratidza maitiro e exciton-polarized excitons mukuzadzikiswa kwe submicron inoenderera laser masosi. Iyo yakagadziridzwa photon-exciton coupling mu submicron perovskites inoguma nekuwedzera kukuru kweboka refractive index kusvika ku80, iyo inowedzera zvakanyanya iyo modhi kuwana kutsiva iyo mode kurasikirwa. Izvi zvinogumawo mune perovskite submicron laser sosi ine yakakwirira inoshanda microcavity quality factor uye yakamanikana emission linewidth (Mufananidzo 2). Iyo michina inopawo mitsva mitsva mukuvandudza kwediki-saizi, yakaderera-chikumbaridzo lasers yakavakirwa pane zvimwe semiconductor zvinhu.
Mufananidzo 2. Mechanism ye sub-micron laser source inoshandisa excitonic polarizons
Song Jiepeng, mudzidzi we2020 Zhibo kubva kuChikoro cheZvishandiso Sainzi uye Injiniya yePeking University, ndiye munyori wekutanga webepa, uye Peking University ndiyo yekutanga chikamu chebepa. Zhang Qing na Xiong Qihua, purofesa weFizikisi paTsinghua University, ndivo vanyori vanowirirana. Basa iri rakatsigirwa neNational Natural Science Foundation yekuChina neBeijing Science Foundation yeVadiki Vechidiki.
Nguva yekutumira: Sep-12-2023