Tsis ntev los no, ib pab neeg coj los ntawm cov xibfwb Zhang Xinzheng, Chen Zhigang, thiab Xu Jingjun los ntawm Lub Tsev Kawm Ntawv ntawm Physical Sciences ntawm Nankai University, koom tes nrog xibfwb Irena Drevenšek Olenik los ntawm Stefan Institute hauv Slovenia, tau nthuav tawm thawj zaug ib ncig polarized hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv hloov pauv li cas nrog cov txheej txheem saum toj kawg nkaus {{0} efficiency. Cov kev tshawb fawb tshawb pom, hu ua "Soft-Tshuaj-Based Topological Vertical Cavity Surface Emitting Lasers," tau luam tawm nyob rau hauv Lub Teeb: Science & Applications thiab xaiv los ua cov ntawv npog rau qhov thib ob.
Qhov no topological VCSEL yog raws li ib tug -dimensional optical superlattice qauv tsim los ntawm ib tug polymer cholesteric kua siv lead ua (PCLC) zaj duab xis spin-coated nrog ib tug fluorescent nce nruab nrab thiab ib tug coj mus muag Mylar zaj duab xis. Lub superlattice nta lub peev xwm hloov tau zoo uas ua rau qhov sib txawv ntawm qhov sib txawv, zoo sib xws rau Semenov insulators thiab quantum Valley Hall nyhuv hauv ob - qhov chaw sib xyaw ua ke. Lawv pom tau hais tias qhov topological VCSEL no tswj tau ib qho zoo heev - hom laser emission ntawm lub twj tso kua mis qis. Qhov tseem ceeb, qhov nyias nyias no - zaj duab xis topological VCSEL muaj cov nqi tsim khoom qis heev, yuav tsum tsis muaj cov txheej txheem tsim cov txheej txheem, tuaj yeem yooj yim sib xyaw rau hauv cov txheej txheem ntawm txhua yam duab, thiab khaws nws cov yam ntxwv laser xav tau thiab lub peev xwm tswj tau txawm tias tom qab ntau qhov khoov.
Nrog kev nce qib txuas ntxiv ntawm cov ntaub ntawv kho qhov muag thiab kev xav tau loj zuj zus rau kev siv me me, tsim qauv hnyav, thiab kev koom ua ke hauv photonic chips, kev txhim kho ntawm -chip lasers tau txais kev saib xyuas ntxiv. Txawm li cas los xij, tam sim no ntawm -chip lasers tseem ntsib cov teeb meem tseem ceeb, suav nrog lub zog tso zis tsawg thiab tsis muaj kev ruaj ntseg. Topologically tiv thaiv lasers muab ib txoj hauv kev zoo tsim kom ua tiav siab ruaj khov thiab tsis tshua muaj qhov pib ntawm -chip lasers. Txawm li cas los xij, txwv los ntawm cov khoom siv semiconductor, fabrication ntawm feem ntau topological VCSELs tam sim no xav tau cov txheej txheem nyuaj thiab meej. Lawv cov lasing wavelengths feem ntau yog nyob ze ntawm -infrared band, thiab lawv muaj cov geometries ruaj khov tsis muaj peev xwm ntawm kev txhais lus beam steering. Yog li ntawd, tus nqi qis -kev txhim kho ntawm cov tshuab hloov pauv tau yooj yim, polarization{10}} tuav, thiab lub teeb yuag ntawm -chip topological VCSELs siv cov ntaub ntawv mos thiab cov qauv tshiab muaj qhov tseem ceeb theoretical thiab cov txiaj ntsig zoo.
Lub hauv paus ntsiab lus ntawm kev tsim kho thiab kev sib txuas Parameter Qhov Chaw ntawm Ib -Dimensional Flexible Optical Superlattices
Thaum lub sij hawm kev tshawb fawb, pab neeg ua ntej stacked Mylar films ntawm ob lub thicknesses sib txawv nrog PCLC nyias zaj duab xis los tsim ib tug -dimensional binary optical superlattice qauv uas spatial inversion symmetry. Los ntawm kev qhia kev sib txuas coefficient modulation los tsim ib qhov chaw hluavtaws, lawv tau piav qhia qhov txawv ntawm cov khoom topological ntawm AB thiab BA superlattices nrog hetero-qhov chaw muaj peev xwm, piv rau quantum valley Hall effect hauv ob -dimensional hexagonal lattices. Tom qab ntawd, lawv tau koom nrog AB thiab BA superlattices nrog cov khoom sib txawv topological-ib qho uas muaj qhov sib npaug sib npaug thiab lwm qhov nrog hetero-qhov chaw muaj peev xwm- los tsim cov kev tiv thaiv topologically cuam tshuam. Cov kev sib txuas lus no nthuav tawm qhov chaw siab nyob hauv qhov bandgap thiab ua kom pom kev ruaj khov tiv thaiv kev tsis sib haum xeeb, muab hom kab noj hniav zoo tshaj plaws rau laser oscillation. Kev sim, pab pawg tau tsim cov khoom siv laser hloov tau nrog 17 txheej los ntawm kev sib tw -txhim kho qhov nce dye PM597 mus rau PCLC nyias zaj duab xis nto. Nyob rau hauv 532 nm pulsed laser siv, cov cuab yeej ua tiav sab laug-xa mus ncig polarized topological laser tso zis ntawm 575.4 nm nrog qhov pib qis li 0.47 μJ (1.5 mW·cm⁻²), nthuav tawm txoj kab nqes kev ua haujlwm ntawm 4.0%. Lub laser beam nthuav tawm cov kev taw qhia zoo heev, nrog rau nws qhov kev faib tawm spatial zoo sib xws nrog lub twj tso kua mis qhov chaw zoo, ua kom pom muaj peev xwm siv tau hauv cov duab xa mus thiab tso saib. Tsis tas li ntawd, los ntawm kev kho lub twj tso kua mis laser kev taw qhia thaum khoov thiab txav cov yeeb yaj kiab los ntawm hauv qab mus rau sab saum toj, lub teeb lub twj tso kua mis tau teeb pom kev sib txawv ntawm tsib cheeb tsam (I-V) ntawm cov qauv, ua rau lub laser emission txav mus rau hauv qab mus rau sab saum toj ntawm qhov screen optical. Kho qhov curvature radius ntawm VCSEL zaj duab xis ntxiv tswj beam kauj lub kaum sab xis. Cov cuab yeej no ua rau lub topological VCSEL tso tawm lub teeb laser ntawm ntau lub ces kaum yam tsis tau tig lub tshuab laser. Qhov tseem ceeb, topological VCSEL nthuav tawm thermal stability, tswj nws qhov kev ua haujlwm laser qub txawm tias tom qab siv ntev ntev. Cov yam ntxwv no ua rau muaj kev koom ua ke nrog ntau yam khoom siv photonic rau cov ntawv thov xws li cov khoom siv coj los siv, hluav taws xob tiv thaiv- cuav, thiab laser scanning.
Daim ntawv thov ua qauv qhia ntawm hloov pauv topological VCSEL
Txoj haujlwm no tau ua thawj zaug hauv Nankai University. Tus kws tshawb fawb Postdoctoral Wang Yu thiab Xib Fwb Xia Shiqi ntawm Nankai University yog tus co- thawj tus kws sau ntawv, thaum cov xibfwb Zhang Xinzheng, Chen Zhigang, thiab Xu Jingjun yog cov kws sau ntawv. Cov kev tshawb fawb tau txais kev txhawb nqa los ntawm National Key R & D Program ntawm Tuam Tshoj, National Natural Science Foundation ntawm Tuam Tshoj, Txoj Haujlwm Tseem Ceeb ntawm Tianjin Natural Science Foundation, Tuam Tshoj Postdoctoral Science Foundation, thiab Slovenian Research Agency.
Txhais nrog DeepL.com (dawb version)
