High-power surface emission from terahertz distributed feedback lasers with a dual-slit unit cell

We present a surface emitting distributed feedback terahertz laser resonator based on a dual-slit configuration. With the spacing of the slits as a parameter, the surface losses of the lasers can be chosen over a large range, while keeping slits narrow for optimum current injection. Quantum cascade devices based on a double metal waveguide showed slope efficiencies up to 40 mW/A and peak powers of more than 20 mW. The efficient radiation out-coupling does not depend on boundary conditions, and therefore would allow the application to large-area devices, making this an ideal resonator for high-power surface emission.

[1]  David A. Ritchie,et al.  Distributed feedback ring resonators for vertically emitting terahertz quantum cascade lasers , 2009 .

[2]  David A. Ritchie,et al.  High-performance operation of single-mode terahertz quantum cascade lasers with metallic gratings , 2005 .

[3]  D. Botez,et al.  METAL-GRATING-OUTCOUPLED SURFACE-EMITTING DISTRIBUTED-FEEDBACK DIODE LASERS , 1996 .

[4]  Qing Hu,et al.  High-power and high-temperature THz quantum-cascade lasers based on lens-coupled metal-metal waveguides. , 2007, Optics letters.

[5]  A. Tredicucci,et al.  Single-mode operation of terahertz quantum cascade lasers with distributed feedback resonators , 2004, Conference on Lasers and Electro-Optics, 2004. (CLEO)..

[6]  Werner Schrenk,et al.  Vertically emitting terahertz quantum cascade ring lasers , 2009 .

[7]  Federico Capasso,et al.  Surface emitting terahertz quantum cascade laser with a double-metal waveguide. , 2006, Optics express.

[8]  A. Tredicucci,et al.  Vertically emitting microdisk lasers , 2008, 2008 Conference on Lasers and Electro-Optics and 2008 Conference on Quantum Electronics and Laser Science.

[9]  Qing Hu,et al.  Surface-emitting distributed feedback terahertz quantum-cascade lasers in metal-metal waveguides. , 2007, Optics express.

[10]  Dan Botez,et al.  Analysis of surface-emitting second-order distributed feedback lasers with central grating phaseshift , 2003 .

[11]  A. Davies,et al.  Predictable surface emission patterns in terahertz photonic-crystal quantum cascade lasers. , 2009, Optics express.

[12]  Jérôme Faist,et al.  Horn antennas for terahertz quantum cascade lasers , 2007 .

[13]  C. Walther,et al.  Finite size effects in surface emitting Terahertz quantum cascade lasers. , 2009, Optics express.

[14]  H. Beere,et al.  Surface plasmon photonic structures in terahertz quantum cascade lasers. , 2006, Optics express.

[15]  M. Schubert,et al.  Analysis of terahertz surface emitting quantum-cascade lasers , 2006, IEEE Journal of Quantum Electronics.