Measurement of the thermo-optic coefficient of a-Si:H at the wavelength of 1500 nm from room temperature to 200 °C

Abstract The thermo-optic coefficient (TOC) of hydrogenated amorphous silicon (a-Si:H) has been measured in the temperature range 30–200 °C, at the communication wavelength of 1.55 μm . The experimental data have been fitted using a single oscillator model that takes into account the shape of e2-spectrum of the amorphous semiconductor. The extracted parameters significantly extend, and are consistent with, the few data reported in the literature. An interesting analogy with crystalline silicon (c-Si) is also found and discussed.