4 research outputs found
Degenerate optical parametric amplification in CMOS silicon
Silicon is a common material for photonics due to its favorable optical
properties in the telecom and mid-wave IR bands, as well as compatibility with
a wide range of complementary metal-oxide semiconductor (CMOS) foundry
processes. Crystalline inversion symmetry precludes silicon from natively
exhibiting second-order nonlinear optical processes. In this work, we build on
recent work in silicon photonics that break this material symmetry using large
bias fields, thereby enabling interactions. Using this approach,
we demonstrate both second-harmonic generation (with a normalized efficiency of
) and, to our knowledge, the first degenerate
optical parametric amplifier (with relative gain of
using of pump power on-chip at a pump
wavelength of ) using silicon-on-insulator waveguides
fabricated in a CMOS-compatible commercial foundry. We expect this technology
to enable the integration of novel nonlinear optical devices such as optical
parametric amplifiers, oscillators, and frequency converters into large-scale,
hybrid photonic-electronic systems by leveraging the extensive ecosystem of
CMOS fabrication.Comment: The first three authors contributed equally to this work; 9 pages, 5
figure
On-chip lateral Si:Te PIN photodiodes for room-temperature detection in the telecom optical wavelength bands
Photonic integrated circuits require photodetectors that operate at room
temperature with sensitivity at telecom wavelengths and are suitable for
integration with planar complementary-metal-oxide-semiconductor (CMOS)
technology. Silicon hyperdoped with deep-level impurities is a promising
material for silicon infrared detectors because of its strong room-temperature
photoresponse in the short-wavelength infrared region caused by the creation of
an impurity band within the silicon band gap. In this work, we present the
first experimental demonstration of lateral Te-hyperdoped Si PIN photodetectors
operating at room temperature in the optical telecom bands. We provide a
detailed description of the fabrication process, working principle, and
performance of the photodiodes, including their key figure of merits. Our
results are promising for the integration of active and passive photonic
elements on a single Si chip, leveraging the advantages of planar CMOS
technology.Comment: 18 pages, 5 Figures, Supplementary informatio