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Article Dans Une Revue Applied Physics Letters Année : 2023

High-power density, single plasmon, terahertz quantum cascade lasers via transverse mode control

C. Song
J. Mangeney
J. Tignon
S. Dhillon

Résumé

Terahertz (THz) quantum cascade lasers (QCLs) have been shown to emit peak powers greater than 1 W from a single facet in a single plasmon geometry. However, this is typically achieved by increasing the laser ridge width, resulting in higher-order transverse modes, limiting the achievable power density. Here, we control and fully suppress these modes through thin metallic side-absorbers, showing laser action solely on the fundamental transverse mode operation without sacrificing high THz peak powers. This leads to enhanced power densities and electric fields of up to 1.8 kW/cm2 and 1.17 kV/cm, respectively, opening up the possibility of applying THz QCLs as pump sources for investigations of nonlinear THz physical phenomena.

Dates et versions

hal-04210086 , version 1 (18-09-2023)

Identifiants

Citer

C. Song, M. Salih, L. Li, J. Mangeney, J. Tignon, et al.. High-power density, single plasmon, terahertz quantum cascade lasers via transverse mode control. Applied Physics Letters, 2023, 122 (12), pp.121108. ⟨10.1063/5.0142359⟩. ⟨hal-04210086⟩
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