We predict the general feasibility and demonstrate the specific design of the THz laser operating between Landau levels in graphene placed on a polar substrate in a magnetic field of order 1 T. Steady state operation under a continuous wave optical pumping is possible due to an interplay between Auger and surface-phonon mediated relaxation of carriers. The scheme is scalable to other materials with massless Dirac fermions, for example surface states in 3D topological insulators such as Bi2Se3 or Bi2Te3.
Cite
@article{arxiv.1501.00534,
title = {Continuous wave lasing between Landau levels in graphene},
author = {Yongrui Wang and Mikhail Tokman and Alexey Belyanin},
journal= {arXiv preprint arXiv:1501.00534},
year = {2015}
}