Physicists qhia ib txoj hauv kev tshiab los txheeb xyuas cov hluav taws xob infrared
Tsis ntev los no, physicists ntawm Tsoom Fwv Teb Chaws Lub Tsev Kawm Ntawv ntawm Technology hauv Lausanne (EPFL) tau npaj ib txoj hauv kev tshiab los kuaj xyuas cov hluav taws xob infrared, uas yog qhov rhiab heev thiab tuaj yeem ntes tau ib qho teeb meem photon. Cov tshuaj nanoscale raws li molecular optomechanics platform rau upconvert terahertz thiab mid-infrared (MIR) photons rau pom-ze-infrared (VIS-NIR) band thiab ntxiv suab nrov rau lawv siv ib tug tag nrho quantum qauv thiab conversion efficiency tau soj ntsuam nyob rau hauv kom meej. . Kev tshawb fawb lub npe "Molecular platform rau zaus upconversion ntawm ib-photon theem" tau luam tawm nyob rau hauv physics.optics, thiab qhov chaw nyob ntawm daim ntawv yog: https://arxiv.org/abs/1910.11395v1.
Thaum siv webcams lossis lub koob yees duab xov tooj ntawm tes, peb paub txog lub zog ntawm pheej yig, compact sensors tsim nyob rau ob peb lub xyoo dhau los rau thaj tsam pom ntawm electromagnetic spectrum. Hauv qhov sib piv, kev kuaj xyuas cov hluav taws xob tsawg tsawg uas pom tsis tau ntawm qhov muag liab qab, xws li hluav taws xob nruab nrab thiab nyob deb infrared, yuav tsum muaj cov khoom siv nyuaj thiab kim. Cov sensors rau kev paub txog molecular thiab kev ntsuas ntawm cov hluav taws xob hluav taws xob ib txwm tso tawm los ntawm tib neeg lub cev tseem tsis tau muaj dav vim tias tsis muaj kev siv thev naus laus zis. Yog li ntawd, txoj kev xav tshiab hauv cheeb tsam no tuaj yeem muaj kev cuam tshuam loj rau peb lub neej txhua hnub. Kev tshawb pom ncaj qha ntawm ib qho photons nrog wavelengths ntau dua 2 micrometers nyob rau hauv ambient tej yam kev mob tam sim no tseem yog ib qho kev sib tw loj heev.
Tam sim no cov txheej txheem nrov tshaj plaws rau kev kuaj cov hluav taws xob nruab nrab mus rau qhov deb yog lub microbolometer, uas muaj cov ntsuas kub me me uas ntsuas cov cua sov uas tsim los ntawm cov hluav taws xob absorbed. Cov cuab yeej no muaj ntau qhov kev txwv, tshwj xeeb tshaj yog lub sij hawm teb qeeb thiab tsis muaj peev xwm txheeb xyuas cov teeb liab tawg.
Pab pawg EPFL coj los ntawm Christophe Galland thiab Tobias Kippenberg tau tshaj tawm txoj kev tshawb nrhiav tshiab uas ua raws li txoj hauv kev sib txawv kiag li: thawj zaug hloov cov hluav taws xob pom tsis pom hauv lub teeb pom kev thiab tom qab ntawd kuaj nws nrog cov thev naus laus zis uas twb muaj lawm. Hauv plawv ntawm lub tswv yim tshiab no yog hybrid hlau-molecular nanostructures. Cov hlau yog hloov kho kom pom cov hluav taws xob infrared ntawm cov molecules, ua rau lawv vibrate. Lub zog ntawm vibrating molecules yog tom qab ntawd hloov mus rau hauv hluav taws xob dua, tab sis lub sij hawm no raws li pom lub teeb. Qhov no hybrid nanostructure, tsim nyob rau hauv kev koom tes nrog Diego Martin-Cano (Max Planck lub koom haum rau lub teeb, Erlangen, lub teb chaws Yelemees), ua tau zoo hloov dua siab tshiab efficiency thaum shrinking cov cuab yeej rau me me npaum li cas ntawm lub wavelength ntawm infrared teeb.
