https://corescholar.libraries.wright.edu/physics/1383/
"Resonant Tunnel Diodes As Submillimetre-Wave Sources" by Elliott R. Brown and C. D. Parker
Resonant-tunnelling diodes (RTDS) are one of the only quantum-transport devices that operate effectively at room temperature, and are well known for their...
tunnel diodesresonantsubmillimetrewavesources