THz intersubband electroluminescence from n-type Ge/SiGe quantum cascade structures

David Stark, Muhammad Mirza, Luca Persichetti +15

We report electroluminescence originating from L-valley transitions in n-type Ge/Si${}_{0.15}$Ge${}_{0.85}$ quantum cascade structures centered at 3.4 and 4.9 THz with a line broadenin…