Hyperbolicphonon-polariton
electroluminescencein2Dheterostructures
1,2,3,9??4,5,9??1,912,36
/10.1038/s41586-025-08686-9QiushiGuo,IliyaEsin,ChengLi,ChenChen,GuanyuHan,SongLiu,
67841??
JamesH.Edgar,SelinaZhou,EugeneDemler,GilRefaelFengnianXia
Received:10November2023
Accepted:22January2025
Phononpolaritonsarequasiparticlesresultingfromthecoherentcouplingofphotons
Publishedonline:19March2025
withopticalphononsinpolardielectrics1.Owingtotheirexceptionalabilitytoconfne
Checkforupdateselectricfeldstodeep-subwavelengthscaleswithlowloss,theyareuniquelypoised
toenableasuiteofapplicationsbeyondthereachofconventionalphotonics,suchas
subdifractionimaging2andnear-feldenergytransfer3–5.Theconventionalapproach
toexcitingphononpolaritonsthroughopticalmethods,however,involvescostly
lightsourcesalongwithnear-feldschemes6,7,andgenerallyleadstolowexcitation
efciencyowingtosubstantialmomentummismatchbetweenphononpolaritons
andfree-spacephotons.Herewedemo