Jaamacadda Peking waxay xaqiiqsatay perovskite joogto ahisha laysarkaka yar 1 micron oo labajibbaaran
Waa muhiim in la dhiso isha laser joogto ah oo leh aag kayar 1μm2 si loo daboolo baahida isticmaalka tamarta hoose ee isku xirka indhaha-chip (<10 fJ bit-1). Si kastaba ha ahaatee, marka cabbirka qalabku hoos u dhaco, khasaaraha muraayadaha iyo maadada ayaa si aad ah u kordhaya, markaa gaaritaanka cabbirka qalabka-yar-yar iyo bamgareynta joogtada ah ee ilaha laysarka ayaa ah mid aad u adag. Sanadihii la soo dhaafay, walxaha perovskite halide waxay heleen fiiro gaar ah oo ku saabsan berrinka lasers-ka indhaha ee joogtada ah sababtoo ah faa'iidooyinkooda sare ee indhaha iyo guryaha gaarka ah ee exciton polariton. Aagga aaladda perovskite ilaha laser joogto ah ee la soo sheegay ilaa hadda waa ka weyn yahay 10μm2, iyo ilaha laser submicron oo dhan waxay u baahan yihiin iftiin pulsed leh cufnaanta tamarta bamka sare si loo kiciyo.
Iyada oo laga jawaabayo caqabadan, kooxda cilmi-baarista ee Zhang Qing oo ka socota Dugsiga Sayniska Qalabka iyo Injineerinka ee Jaamacadda Peking waxay si guul leh u diyaariyeen qalab tayo sare leh oo perovskite submicron hal crystal si loo gaaro ilo laser ah oo bamgareyn joogto ah oo leh aag qalab ah oo hooseeya sida 0.65μm2. Isla mar ahaantaana, photon-ka ayaa la soo bandhigay. Habka loo yaqaan 'exciton polariton' ee submicron-ka joogtada ah ee habka lasaabka indhaha lagu shubo ayaa si qoto dheer loo fahmay, taas oo bixisa fikrad cusub oo loogu talagalay horumarinta cabbirka yar ee leysarka semiconductor-ka hooseeya. Natiijooyinka daraasadda, oo cinwaan looga dhigay "Wave Continuous Wave Pumped Perrovskite Lasers with Area Device Under 1 μm2," ayaa dhawaan lagu daabacay Qalabka Sare.
Shaqadan, xaashida micron-ka ah ee CsPbBr3 ee perovskite inorganic ayaa lagu diyaariyay substrate sapphire iyadoo la dhigayo uumiga kiimikada. Waxaa la arkay in isku-xidhka xooggan ee perovskite excitons oo leh codka gidaarka dhawaaqa microcavity ee heerkulka qolka ay keentay sameynta polariton excitonic. Iyada oo loo marayo cadaymo taxane ah, sida kuwa toosan iyo xoojinta qiiqa aan tooska ahayn, ballaca xariiqda cidhiidhiga ah, beddelka polarization qiiqa iyo isbeddelka isku xidhka boosaska ee marinka, laydhka joogtada ah ee si toos ah u bamgaraysan ee CsPbBr3 hal crystal ah ayaa la xaqiijiyay, iyo aagga aaladda waa sida ugu hooseeya 0.65μm2. Isla mar ahaantaana, waxaa la ogaaday in marinka isha isha laser-ka hoose uu la mid yahay kan isha weyn ee leysarka, oo xitaa uu hoos u dhigi karo (Jaantuska 1).
Jaantuska 1. Si joogto ah oo indho-indhayn ah oo hoos yimaada CsPbBr3isha iftiinka laysarka
Dheeraad ah, shaqadani waxay sahamisaa labadaba tijaabo ahaan iyo aragti ahaan, waxayna muujineysaa habka loo yaqaan 'exciton-polarized excitons' ee xaqiijinta ilaha laser-ka ee joogtada ah. Isku xirka photon-exciton ee la xoojiyey ee submicron perovskites wuxuu keenayaa koror weyn oo ku yimid index refractive group ilaa 80, taas oo si weyn u kordhisa faa'iidada qaabka si loo magdhabo khasaaraha qaabka. Tani waxay sidoo kale keentaa isha leysarka perovskite submicron oo leh arrin tayo sare leh oo tayo sare leh iyo qiiqa qiiqa dhuuban (Jaantuska 2). Habkani wuxuu sidoo kale bixiyaa fikrado cusub oo ku saabsan horumarinta cabbirka yar-yar, laysarka hooseeya ee ku salaysan qalabka kale ee semiconductor.
Jaantuska 2. Farsamaynta isha isha-ka-hoosaadka ee leysarka iyadoo la adeegsanayo polarizons excitonic
Song Jiepeng, oo ah arday 2020 Zhibo ah oo ka socda Dugsiga Sayniska Qalabka iyo Injineerinka ee Jaamacadda Peking, waa qoraaga ugu horreeya ee warqadda, Jaamacadda Peking waa cutubka koowaad ee warqadda. Zhang Qing iyo Xiong Qihua, oo ah borofisar cilmiga Fiisigiska ka dhiga Jaamacadda Tsinghua, ayaa ah qorayaasha u dhigma. Shaqada waxaa taageeray Ururka Qaranka ee Sayniska Dabiiciga ah ee Shiinaha iyo Mu'asasada Sayniska ee Beijing ee Dadka Da'yarta ah ee aadka u wanaagsan.
Waqtiga boostada: Seb-12-2023