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

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 re...

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Veröffentlicht in:	Applied physics. A, Materials science & processing Materials science & processing, 2011-06, Vol.103 (4), p.1139-1144
Hauptverfasser:	Chevallier, C., Fressengeas, N., Genty, F., Jacquet, J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Characterization and Evaluation of Materials Condensed Matter Physics Doped-insulator lasers and other solid state lasers Exact sciences and technology Fundamental areas of phenomenology (including applications) Holes Lasers Machines Manufacturing Nanotechnology Optical and Electronic Materials Optics Physics Physics and Astronomy Polarization Processes Quality factor Reflectivity Surfaces and Interfaces Thin Films Tolerances Vertical cavity surface emission lasers Wavelengths
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Beschreibung
Zusammenfassung:	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 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.
ISSN:	0947-8396 1432-0630
DOI:	10.1007/s00339-010-6059-4