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We report the first observation of a hypersonic mode of a small-core silicon wire. In particular, we achieve record 4.4 dB on/off continuous-wave Brillouin gain at 1550 nm. The wire is supported by a tiny oxide pillar to block the path for external phonon leakage.
We discuss our recent developments using silicon nanophotonic wires as nonlinear media at mid-IR wavelengths both to observe nonlinear optical physics and to explore specific application.
A mid-infrared octave spanning frequency comb is generated in a silicon waveguide. By beating the generated comb on a photodetector with a narrow linewidth lightsource the linewidth of the lines is measured to be <100kHz.
We demonstrate the generation of a stable supercontinuum in a 1-cm-long hydrogenated amorphous silicon waveguide by pumping the wire with 1950 nm picosecond pulses in the anomalous dispersion regime. The supercontinuum extends from 1460 to 2485 nm for a coupled peak power of 28.1 W.
Using four-wave mixing in normally-dispersive mid-infrared silicon nanophotonic waveguides, we demonstrate the conversion of light across more than 1.2 octaves, from the telecom band to a wavelength of 3630 nm.
In this paper, we review our work on III–V/SOI photonic integrated circuits for short-wave infrared applications. We focus on the integration of short-wave infrared photodetectors on a silicon photonics platform and on the generation of a short-wave infrared supercontinuum using the nonlinearity in silicon photonic wires. In addition, the performance of a silicon optical parametric amplifier...
A synchronously-pumped mid-infrared optical parametric oscillator is demonstrated using unprecedented large parametric gain in silicon photonic wires. The output wavelength is tunable over a 75-nm bandwidth, with a maximum output pulse energy of 1.62 pJ.
The silicon nanophotonic wire platform can be applied toward development of integrated optical devices for the generation and processing of mid-infrared light signals. The demonstration of a mid-infrared optical parametric amplifier will be reviewed, and recent work aimed at expanded gain bandwidth and reduced pump power requirements will be presented.
We demonstrate an ultra-broadband optical supercontinuum extending from 1.53μm up to 2.55μm, generated in a dispersion-engineered silicon photonic wire. The supercontinuum is generated using low power mid-infrared picosecond pump pulses at 2.12μm.
We demonstrate broadband modulation instability, > 40 dB parametric amplification with on-chip gain bandwidth > 580 nm, and narrowband Raman-assisted peak on-chip gain exceeding 50 dB, using mid-infrared dispersion-engineered silicon nanophotonic wires.
Silicon nanowires have an immense potential for nonlinear optical functions. Recent work on four-wave-mixing gain in hydrogenated amorphous silicon wires at telecom wavelengths and in crystalline silicon wires in the 2μm wavelength range is reviewed.
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