Tunable Terahertz Cyclotron Emission from Two-Dimensional Dirac Fermions

B. Benhamou--Bui (1) , S. Gebert (2, 3) , M. Szola (1) , C. Consejo (1) , S S Krishtopenko (1) , S. Ruffenach (1) , Jeremie Torres (2, 3, 4, 5, 6) , Benoit Jouault (1) , K. Maussang (2) , M. Orlita (7) , X. Baudry (8) , P. Ballet (8) , S V Morozov (9) , V I Gavrilenko (9) , N N Mikhailov (10) , S A Dvoretskii (11) , F. Teppe (1) , Cédric Bray

1 L2C - Laboratoire Charles Coulomb
2 IES - Institut d’Electronique et des Systèmes
3 PhoTéra - Photonique et Térahertz
4 CI - Capteurs et Instrumentations
5 PO - Photonique et Ondes
6 MAT - Matériaux
7 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
8 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information
9 Institute for Physics of Microstructures of the RAS
10 ISP - Rzhanov Institute of Semiconductor Physics
11 Institute of semiconductor Physics - Institute of semiconductor Physics

We report on the emission of Terahertz radiation from Landau quantized Dirac electrons in HgTe/CdHgTe based quantum wells. We show that this cyclotron emission is continuously tunable with magnetic field from 500 GHz up to 2.5 THz. Moreover, given the relativistic nature of charge carriers, the cyclotron mass and therefore the emitted frequency are also tunable with the electron density. These results pave the way for the long-awaited Landau laser which could additionally be tunable by a gate voltage with a fixed magnetic field.

Mots clés: Charge carriers; Lasers; Voltage; Terahertz radiation; Logic gates; Magnetic fields; Cyclotrons

Domaines: Matière Condensée [cond-mat]

B. Benhamou--Bui, S. Gebert, M. Szola, C. Consejo, S S Krishtopenko, et al.. Tunable Terahertz Cyclotron Emission from Two-Dimensional Dirac Fermions. 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2023), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/irmmw-thz57677.2023.10298862⟩. ⟨hal-04304349⟩