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Reduction of Facet Reflectivity of Quantum-Cascade Lasers With Subwavelength Gratings

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7 Author(s)
Dirisu, A.O. ; Dept. of Electr. Eng., Princeton Univ., NJ ; Silva, G. ; Zhijun Liu ; Gmachl, C.F.
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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 reported

Published in:

Photonics Technology Letters, IEEE  (Volume:19 ,  Issue: 4 )

Date of Publication:

Feb.15, 2007

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