1.
Phys Rev Lett
; 123(11): 117401, 2019 Sep 13.
Artigo
em Inglês
| MEDLINE
| ID: mdl-31573228
RESUMO
Unexpected light propagation effects, such as negative refraction, have been reported in artificial media. Leveraging on the intersubband resonances in heterostructured semiconductors, we show that all possible optical regimes, ranging from classical dieletric and metal to hyperbolic metamaterial types 1 and 2, can be achieved. As a demonstration, we prove that the negative refraction effect can occur at a designed frequency by controlling the electronic quantum confinement.