TY - JOUR

T1 - Gate tunable terahertz cyclotron emission from two-dimensional Dirac fermions

AU - Benhamou-Bui, B.

AU - Consejo, C.

AU - Krishtopenko, S. S.

AU - Szola, M.

AU - Maussang, K.

AU - Ruffenach, S.

AU - Chauveau, E.

AU - Benlemqwanssa, S.

AU - Bray, C.

AU - Baudry, X.

AU - Ballet, P.

AU - Morozov, S. V.

AU - Gavrilenko, V. I.

AU - Mikhailov, N. N.

AU - Dvoretskii, S. A.

AU - Jouault, B.

AU - Torres, J.

AU - Teppe, F.

N1 - This work was supported by the TeraHertz Occitanie Platform, the CNRS through IRP “TeraMIR” by the French Agence Nationale pour la Recherche (ANR) for Equipex+ Hybat (ANR-21 -ESRE-0026) project, by the European Union and the ANR for Flag-Era JTC 2019 DeMeGRaS project (ANR-19-GRF1-0006-03), and the Center of Excellence (Center of Photonics), funded by the Ministry of Science and Higher Education of the Russian Federation (Contract No. 075-15-2022-316; S.V.M., V.I.G.). We would like to thank Laurent Bonnet and Nassim Mouelhi for technical support.

PY - 2023/11

Y1 - 2023/11

N2 - Two-dimensional Dirac fermions in HgTe quantum wells close to the topological phase transition can generate significant cyclotron emission that is magnetic field tunable in the terahertz frequency range. Due to their relativistic-like dynamics, their cyclotron mass is strongly dependent on their electron concentration in the quantum well, providing a second tunability lever and paving the way for a gate-tunable, permanent-magnet Landau laser. In this work, we demonstrate the proof-of-concept of such a back-gate tunable THz cyclotron emitter at a fixed magnetic field. The emission frequency detected at 1.5 T is centered at 2.2 THz and can already be electrically tuned over 250 GHz. With an optimized gate and a realistic permanent magnet of 1.0 T, we estimate that the cyclotron emission could be continuously and rapidly tunable by the gate bias between 1 and 3 THz, that is to say on the less covered part of the THz gap.

AB - Two-dimensional Dirac fermions in HgTe quantum wells close to the topological phase transition can generate significant cyclotron emission that is magnetic field tunable in the terahertz frequency range. Due to their relativistic-like dynamics, their cyclotron mass is strongly dependent on their electron concentration in the quantum well, providing a second tunability lever and paving the way for a gate-tunable, permanent-magnet Landau laser. In this work, we demonstrate the proof-of-concept of such a back-gate tunable THz cyclotron emitter at a fixed magnetic field. The emission frequency detected at 1.5 T is centered at 2.2 THz and can already be electrically tuned over 250 GHz. With an optimized gate and a realistic permanent magnet of 1.0 T, we estimate that the cyclotron emission could be continuously and rapidly tunable by the gate bias between 1 and 3 THz, that is to say on the less covered part of the THz gap.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85178557188&origin=inward&txGid=fac44d5613621b1fdc87e92ed7a8e712

UR - https://www.mendeley.com/catalogue/74049dd0-f921-3b3d-9d34-3549af3eb142/

U2 - 10.1063/5.0168578

DO - 10.1063/5.0168578

M3 - Article

VL - 8

JO - APL Photonics

JF - APL Photonics

SN - 2378-0967

IS - 11

M1 - 116106

ER -