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Optica Publishing Group
  • CLEO/Europe and EQEC 2009 Conference Digest
  • (Optica Publishing Group, 2009),
  • paper CK9_2

Online Tuning of Active Photonic Crystal Quantum-Cascade Lasers

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Abstract

The terahertz (THz) spectral region is very attractive for applications such as real-time imaging, heterodyne detection or spectroscopy. The preferred, monolithic sources are quantum-cascade lasers (QCLs). The emission frequency can be tuned easily to the required one due to the designable gain. However, the inhomogeneous gain broadening with a typical full-width half-maximum (FWHM) of 130 GHz [1] leads to a multi-mode emission. For a precise frequency control two-dimensional photonic crystals (PhCs) based on isolated pillars are the ideal solution. The designable dispersion of the PhCs and the predicted gain enhancement [2] allows for versatile devices [3,4].

© 2009 IEEE

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