Abstract

We experimentally investigate and compare the thermo-optic effects of silicon carbide (SiC) and silicon (Si) photonic crystal nanocavities on their resonant wavelengths over a temperature range of 25°C to nearly 200°C by using a laser source with a wavelength close to the telecommunication wavelength range of 1550nm. The measured results clearly show that the shift in the resonant wavelength of the SiC cavity is significantly (by a factor of 3) less than that of the Si cavity for the same ambient temperature changes. In addition, the measured results provide direct estimates of the thermo-optic coefficients (dn/dT) for thin SiC and Si as 3.87×105/°C and 1.60×104/°C, respectively, for this temperature range.

© 2011 Optical Society of America

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