Abstract
This paper provides a numerical analysis of the influence of photonic crystal
etching depth on the confinement factor, slope efficiency, emitted power and tuning
range of single mode VCSELs. Several mechanisms were used to determine the level of
power emission, namely: selective leakage, thermal focusing, the waveguide effect
induced by the photonic-crystal, gain spectrum red shift, and its maximum reduction with
the increase of driving currents. We show that careful design of the photonic crystal
allows for a 10% increase in the emitted power of a single-mode regime and for a broad
range of steering currents from 5 to 50 mA. Such attributes support tuning of a
single-mode emission beyond the 20 nm spectrum range.
© 2013 IEEE
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