Tsis ntev los no, pab neeg ntawm xibfwb David Di los ntawm Lub Tsev Kawm Ntawv ntawm Optoelectronic Science thiab Engineering ntawm Zhejiang University / Haining International Joint College, Tus Kws Tshawb Fawb Zou Chen thiab xibfwb Zhao Baodan tau tsim lub ntiaj teb thawj lub tshuab hluav taws xob perovskite laser. Qhov no yog "dual- kab noj hniav" laser uas muaj ob lub qhov muag qhov muag. Nws koom ua ke ib qho qis -threshold perovskite ib leeg-crystal microcavity subunit thiab siab -power microcavity perovskite LED subunit rau hauv tib lub cuab yeej, tsim cov vertically stacked multi- txheej txheej.
Qhov tshiab semiconductor laser no yuav tsum muaj qhov tsawg kawg nkaus tam sim no (qhov pib tam sim no) ntawm 92 A / cm² kom tawm lub teeb, uas yog ib qho kev txiav txim siab qis dua qhov zoo tshaj plaws organic semiconductor lasers. Nws kuj nthuav tawm kev ruaj ntseg zoo heev thiab ua kom muaj kev hloov pauv sai ntawm qhov bandwidth ntawm 36.2 MHz, ua rau nws yog ib tus neeg sib tw txaus siab rau cov ntawv thov hauv -chip cov ntaub ntawv xa mus, suav, thiab biomedicine. Cov ntawv tshawb fawb tau luam tawm hauv * Xwm * thaum Lub Yim Hli 27.
Muaj ntau hom lasers, thiab tam sim no, cov khoom siv laser tshiab xws li perovskite semiconductors, organic semiconductors, thiab quantum dots yog qhov pom tau zoo. Ntawm cov ntaub ntawv no, perovskite semiconductors tuav cov lus cog tseg tshwj xeeb vim lawv cov kev ua haujlwm tunable emission spectra (muaj peev xwm ua tau ntau yam xim) thiab tsis tshua muaj laser emission pib nyob rau hauv optical pumping (ie, lub teeb -tsav) tej yam kev mob.
Txawm li cas los xij, txoj kev loj hlob ntawm hluav taws xob tsav perovskite lasers tau ntev tau qhov kev sib tw loj tshaj plaws hauv kev ua haujlwm ntawm perovskite optoelectronics thiab tseem yog lub hom phiaj sib koom ua raws los ntawm ntau pab pawg tshawb fawb thoob ntiaj teb.
"Yuav kom ua tiav cov hluav taws xob uas siv hluav taws xob laser emissions, peb tau tsim ib qho kev sib xyaw ua ke dual- kab noj hniav qauv. Peb txoj hauv kev muaj kev sib xyaw ua ke nrog lub siab- lub zog microcavity perovskite LED subunit nrog siab- zoo ib zaug- siv lead ua perovskite microcavity subunit nyob rau hauv ib qho khoom siv. ", David tau piav qhia. Cov cuab yeej no tau txais txiaj ntsig zoo ua ke nrog ntau tus photons tsim los ntawm microcavity perovskite LED nyob rau hauv hluav taws xob excitation rau hauv microcavity thib ob, qhov chaw uas lawv ua rau ib qho - crystal perovskite nce nruab nrab los tsim lub teeb laser.
"Txawm hais tias lub hauv paus ntsiab lus ntawm kev sib koom ua ke ntawm electro-kev ua haujlwm tsis ua haujlwm tsis yooj yim hauv nws tus kheej, peb tseem tau ntsib ntau yam teeb meem thaum peb pib tsim lub laser," said Zou Chen, tus sau ntawv sib txuas ntawm daim ntawv. Raws li pab neeg tau kov yeej txhua qhov teeb meem ntawm ib qho los ntawm ib qho, qhov kev zoo siab thiab kev zoo siab tsis txaus ntseeg tau zoo tuaj thaum lawv pom qhov ntev - tos laser spectrum thawj zaug hauv hluav taws xob tsav.
