Reduction of Facet Reflectivity of Quantum-Cascade Lasers With Subwavelength Gratings
- 1 March 2007
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 19 (4) , 221-223
- https://doi.org/10.1109/lpt.2006.890755
Abstract
We demonstrate the reduction of the facet reflectivity of quantum-cascade lasers (QCLs) by using subwavelength gratings. The gratings were fabricated on lambda=4.9- and 9.8-mum QCLs using focused ion beam milling. Reflectivities as low as 1%-3% for the 4.9-mum QCL and as low as 4%-8% for the 9.8-mum QCL are reportedKeywords
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