@Workshop{Supelec871,
author = {Christyves Chevallier and Frédéric Genty and Nicolas Fressengeas and Joel Jacquet},
title = {{Robust design for parameter tolerant GaAs High Contrast Grating mirror for mid infrared VCSEL application}},
year = {2013},
booktitle = {{41st Freiburg Infrared Colloquium}},
month = {Feb},
address = {Freiburg (Germany )},
abstract = {Grating structures made of materials which provide a high optical
index contrast between the grating slabs and the surrounding
medium have shown many extraordinary properties. The resonance of
Bloch modes between the two grating interfaces and their coupling
can be adjusted to obtain different and very promising properties
in a large range of applications such as broadband mirrors,
high-Q filters, planar lenses, circular polarizer... The
development of VCSEL devices based on GaSb for a mid-infrared
emission is still limited today at 2.6 µm. The high performances
of high contrast grating (HCG) mirrors combined with a good
polarization selectivity and a thickness lower than 2 µm should
be very promising characteristics to enhance electrical, thermal
and optical properties of VCSEL devices emitting above 2.3 µm and
would allow spectroscopic measurements of polluting gas in the
2-3 µm wavelength range. In this paper, we present the design of
a GaAs HCG to replace the top Bragg mirror of mid infrared based
VCSEL. A robust optimization algorithm is used to find the best
dimensions of the HCG structure for a VCSEL application. Thus,
the homemade algorithm searches not only for the most efficient
mirror but also for a robust design structure with large
tolerances with respect to the errors of fabrication on the
grating dimensions.}
}