Abstract
We perform time-domain measurements of optical transport dynamics in silicon nano-photonic devices. Using pulsed optical excitation the thermal and carrier induced optical nonlinearities of micro-ring resonators are investigated, allowing for identification of their individual contributions. Under pulsed excitation build-up of free carriers and heat in the waveguides leads to a beating oscillation of the cavity resonance frequency. When employing a burst of pulse trains shorter than the carrier life-time, the slower heating effect can be separated from the faster carrier effect. Our scheme provides a convenient way to thermally stabilize optical resonators for high-power time-domain applications and nonlinear optical conversion.
Original language | English (US) |
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Pages (from-to) | 18438-18452 |
Number of pages | 15 |
Journal | Optics Express |
Volume | 18 |
Issue number | 17 |
DOIs | |
State | Published - Aug 16 2010 |