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Conferences > CLEO > 2007 > CWG > CWG5
  • Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies
  • OSA Technical Digest Series (CD) (Optica Publishing Group, 2007),
  • paper CWG5

Low-Divergence Surface-Emitting Terahertz Quantum Cascade Lasers

Jonathan A. Fan, Mikhail A. Belkin, Federico Capasso, Suraj Khanna, Mohamed Lachab, Giles Davies, and Edmund H. Linfield

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Abstract

We investigate surface-emission via a second-order grating in terahertz quantum cascade lasers. We optimize grating design and suppress facet reflectivity with absorbing waveguide edges. Single-mode lasing, small beam divergence, and improved slope efficiency are observed.

© 2007 Optical Society of America

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