Terahertz Optoelectronics of Quantum Rings and Nanohelices
We outline a range of proposals on using quantum rings and nanohelices for terahertz device implementations. We show that an Aharonov-Bohm quantum ring system and a double-gated quantum ring system both permit control over the polarization properties of the associated terahertz radiation. In addition, we review the superlattice properties of a mathematically similar system, that of a nanohelix in external electric fields, which reveals negative differential conductance.
This work was financially supported by the EU H2020 RISE project CoExAN (TPC and MEP), the EPSRC CDT in Metamaterials XM2 (TPC), the RFBR project 18-29-19007 (OVK), and by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program (MEP).