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Journal Article

Multi-wavelength operation and vertical emission in THz quantum-cascade lasers


Sadowski,  M. L.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Scalari, G., Sirigu, L., Terazzi, R., Walther, C., Amanti, M. I., Giovannini, M., et al. (2007). Multi-wavelength operation and vertical emission in THz quantum-cascade lasers. Journal of Applied Physics, 101(8): 081726.

Cite as: https://hdl.handle.net/21.11116/0000-000E-B41F-5
Multi-wavelength laser action in the terahertz (THz) region from a quantum cascade structure is demonstrated. Laser emission is obtained at 1.39 and 2.3 THz by using a structure based on a large single quantum well. A strong perpendicular magnetic field is employed to increase the gain and achieve laser action. In the second part of the work, a vertically emitting THz quantum cascade laser device that exploits an in-plane optical resonator based on a two-dimensional photonic crystal is demonstrated. Stable single mode vertical emission is reported. Simulations based on the block-iterative frequency-domain method on a plane wave basis account for the observed results. (c) 2007 American Institute of Physics.