Tsis ntev los no, ib pab neeg tshawb fawb los ntawm Aerospace Laser Technology thiab Systems Department ntawm Shanghai Institute of Optics thiab Precision Mechanics, Suav Academy ntawm Kev Tshawb Fawb thiab Lub Chaw Haujlwm Tseem Ceeb ntawm Quantum Optics, Suav Academy ntawm Kev Tshawb Fawb, thiab xibfwb Chen Liqing cov pab pawg tshawb fawb los ntawm East China. Lub Tsev Kawm Ntawv Qib Siab, sim ua kom pom qhov kev sim ib txhij hauv rubidium Rydberg atom thawj zaug. Rydberg microwave sensor nrog siab rhiab heev thiab siab instantaneous bandwidth. Cov txiaj ntsig cuam tshuam yog lub npe "Highly rhiab heev microwave electrometry nrog txhim kho instantaneous bandwidth" thiab luam tawm nyob rau hauv PHYSICAL REVIEW APPLIED
Rydberg atoms yog cov atoms zoo siab heev nrog lub sijhawm hluav taws xob loj dipole thiab muaj kev nkag siab zoo rau sab nraud electromagnetic teb. Vim li no, tib neeg tau thov kom siv electromagnetic induction transparency (EIT) thiab Autler-Townes (AT) ntawm Rydberg atoms. Qhov cuam tshuam los ntsuas qhov hluav taws xob microwave. Kev tshawb pom rhiab heev thiab instantaneous bandwidth yog cov cim tseem ceeb ntawm Rydberg microwave nrhiav tau. Yav dhau los, Rydberg atomic superheterodyne nrhiav kom tau thev naus laus zis tuaj yeem ua tiav qhov rhiab heev (55 nV cm? 1 Hz? 1/2), tab sis nws cov bandwidth instantaneous tau txwv rau ob peb puas kilohertz. Muaj cov yam ntxwv ntawm siab rhiab heev thiab loj instantaneous bandwidth nyob rau tib lub sij hawm yog ib qho teeb meem nyuaj nyob rau hauv lub tshav pob ntawm Rydberg microwave hluav taws xob teb tshawb nrhiav.
Raws li 6-yoj sib xyaw tshuab, pab pawg tshawb fawb tau sim ua kom pom lub Rydberg microwave sensor uas ib txhij ua tiav siab rhiab heev thiab siab ceev bandwidth hauv rubidium Rydberg atomic gas chamber. Nrog ib qho instantaneous bandwidth siab li 10.2 MHz, qhov siab tshaj Qhov kev kuaj pom muaj peev xwm ncav cuag 62nVcm-1Hz-1/2. Kev tshawb xav thiab kev sim pom tau hais tias qhov kev txhim kho siab-zaum teb tau tshwm sim los ntawm kev txhim kho cov txiaj ntsig ntawm qhov tsis zoo sab ntawm lub teeb pom kev uas tsim los ntawm cov txheej txheem rau-yoj sib tov. Cov txiaj ntsig kev tshawb fawb yuav txhawb nqa kev siv Rydberg microwave sensing technology hauv radar thiab kev sib txuas lus.
Cov haujlwm tseem ceeb tau txais kev txhawb nqa los ntawm National Natural Science Foundation ntawm Tuam Tshoj thiab lwm cov haujlwm.
