Publications

Terahertz quantum-cascade laser at λ ≈ 100 μm using metal waveguide for mode confinement

Williams, Benjamin S.; Kumar, Sushil; Callebaut, Hans; Hu, Qing; Reno, J.L.

A report lasing at ∼3.0 THz (λ≈98-102 μm) in which mode confinement was provided by a double-sided metal waveguide was presented. The waveguide consists of metallic films placed above and below the 10-μm-thick multiple-quantum-well gain region, which gives low losses and a modal confinement factor of nearly unity. The one-dimensional mode patterns for the two waveguides were calculated using a Drude model solver.