Optimized sub-wavelength grating mirror design for mid-infrared wavelength range

Christyves Chevallier (1) , Nicolas Fressengeas (1) , Frédéric Genty (1) , Joël Jacquet (1)

1 LMOPS - Laboratoire Matériaux Optiques, Photonique et Systèmes

Several designs of sub-wavelength grating mirrors adapted to mid-infrared operation are reported with several percents of tolerance for the grating fabrication. These designs have been automatically optimized by the use of a genetic-based algorithm to maximize a quality factor defined to meet the requirements of a VCSEL cavity mirror. These mirrors are devoted to an integration in VCSEL operating near λ=2.3 µm, with a large bandwidth, very high reflectivity coefficient for transverse magnetic mode only, polarization selectivity and a thickness as low as 2 µm.

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]

Christyves Chevallier, Nicolas Fressengeas, Frédéric Genty, Joël Jacquet. Optimized sub-wavelength grating mirror design for mid-infrared wavelength range. Applied physics. A, Materials science & processing, 2011, 103 (4), pp.1139-1144. ⟨10.1007/s00339-010-6059-4⟩. ⟨hal-00521032⟩