Abstract
We report planar integration of tapered Terahertz (THz) quantum cascade lasers (QCLs) with spoof surface plasmon (SSP) structures. The SSP structure consists of one plasmonic coupler and periodically arranged scatters. The resulting surface-emitting THz beam is highly collimated with a beam divergence as narrow as 3.6°×9.7°. As the beam divergence is inverse proportional to the light emission area, this low divergence indicates a good waveguiding property of the SSP structure, while the low optical background of the beam implies a high coupling efficiency of the THz wave from the laser cavity to the SSPs. Since all the structures are in-plane, this scheme provides a promising platform where the well-established SP techniques can be employed to engineer the THz QCL beam with high flexibilities.
© 2014 Optical Society of America
PDF ArticleMore Like This
Nanfang Yu, Qi Jie Wang, Suraj P. Khanna, Lianhe Li, A. Giles Davies, Edmund H. Linfield, and Federico Capasso
CTuMM5 Conference on Lasers and Electro-Optics (CLEO:S&I) 2010
Romain Blanchard, Jean-Philippe Tetienne, Nanfang Yu, Patrice Genevet, Mikhail A. Kats, Jonathan A. Fan, Tadataka Edamura, Shinichi Furuta, Masamichi Yamanishi, and Federico Capasso
Tu7 CIOMP-OSA Summer Session: Lasers and Their Applications (SumSession) 2011
Ioana Moldovan-Doyen, Arthur Babuty, Adel Bousseksou, Raffaele Colombelli, Samuel Grésillon, and Yannick De Wilde
CTuOO2 Conference on Lasers and Electro-Optics (CLEO:S&I) 2010