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We present the first functional signal processing device based on stimulated Brillouin scattering from a silicon nanowire. We use only 0.98dB SBS gain to create a tunable RF notch filter with an ultrahigh 48dB suppression.

We demonstrate a record high Brillouin gain in a silicon chip through hybrid integration. Negligible nonlinear losses lead to a net gain amplification of 18.5 dB in a compact (0.3 mm2) 5.7cm As2S3 spiral.

We present the first functional signal processing device based on stimulated Brillouin scattering from a silicon nanowire. We use only 0.98dB SBS gain to create a tunable RF notch filter with an ultrahigh 48dB suppression.

We generate a 1.9-4.9 µm supercontinuum in dispersion engineered silicon waveguides with a sapphire substrate. The sapphire substrate allows for extension of the long wavelength edge into the mid-IR by ~1000 nm over silicon-on-silica waveguides.

We theoretically investigate non-reciprocal mode-conversion arising from Stimulated Brillouin Scattering (SBS) in sub-micron nanophotonic waveguides. We find that hybrid acoustic modes can be efficiently generated via radiation pressure, leading to enhancement of SBS-based mode conversion.

We fabricated a relative humidity sensor based on a selectively infiltrated photonic crystal. We demonstrate how the reversible hydroscopic behavior of the embedded liquid into the air micropores impacts the photonic crystal waveguide cut-off frequency.

We demonstrate, experimentally, slow light dispersion engineering of photonic crystal waveguides using a selective liquid infiltration. We highlight how the amount of fluid infiltrated into the periodic air micropores critically influences the waveguide dispersion

We present a method to create coupled waveguide arrays via tapering 7-core germanosilicate fiber. Using an ultrashort pulse laser system the device is shown to exhibit nonlinear waveguide array physics, including nonlinear optical pulse chopping.

We present a new method to create a coupled waveguide array via tapering a multi-core telecommunications fiber. This device exhibits the novel physics associated with coupled waveguide arrays: Discrete self-focusing and nonlinear pulse chopping.

The new CO2 laser constructed in Cali Colombia was characterized. Include power vs. pressure, for a constant voltage and constant pressure, spectrum visible for mixture, stability of the power, wavelength measurement, polarization, and mixture optimization.