47 research outputs found
High-Speed, Low-Power and Mid-IR Silicon Photonics Applications
In this book, the first high-speed silicon-organic hybrid (SOH) modulator is demonstrated by exploiting a highly-nonlinear polymer cladding and a silicon waveguide. By using a liquid crystal cladding instead, an ultra-low power phase shifter is obtained. A third type of device is proposed for achieving three-wave mixing on the silicon-organic hybrid (SOH) platform. Finally, new physical constants which describe the optical absorption in charge accumulation/inversion layers in silicon are determined
Photonics design tool for advanced CMOS nodes
Recently, the authors have demonstrated large-scale integrated systems with
several million transistors and hundreds of photonic elements. Yielding such
large-scale integrated systems requires a design-for-manufacture rigour that is
embodied in the 10 000 to 50 000 design rules that these designs must comply
within advanced complementary metal-oxide semiconductor manufacturing. Here,
the authors present a photonic design automation tool which allows automatic
generation of layouts without design-rule violations. This tool is written in
SKILL, the native language of the mainstream electric design automation
software, Cadence. This allows seamless integration of photonic and electronic
design in a single environment. The tool leverages intuitive photonic layer
definitions, allowing the designer to focus on the physical properties rather
than on technology-dependent details. For the first time the authors present an
algorithm for removal of design-rule violations from photonic layouts based on
Manhattan discretisation, Boolean and sizing operations. This algorithm is not
limited to the implementation in SKILL, and can in principle be implemented in
any scripting language. Connectivity is achieved with software-defined
waveguide ports and low-level procedures that enable auto-routing of waveguide
connections.Comment: 5 pages, 10 figure
High-speed modulator with interleaved junctions in zero-change CMOS photonics
A microring depletion modulator is demonstrated with T-shaped lateral p-n
junctions used to realize efficient modulation while maximizing the RC limited
bandwidth. The device having a 3 dB bandwidth of 13 GHz has been fabricated in
a standard 45 nm microelectronics CMOS process. The cavity has a linewidth of
17 GHz and an average wavelength-shift of 9 pm/V in reverse-bias conditions.Comment: 7 pages, 3 figure
Detection or modulation at 35 Gbit/s with a standard CMOS-processed optical waveguide
Light modulation and detection within a single SOI waveguide is demonstrated at 1550 nm. Multi-functional devices allow simplified transceiver systems. Savings in the number of fabrication steps increase the yield and reduce costs
Optical properties of highly nonlinear silicon-organic hybrid (SOH) waveguide geometries
Geometry, nonlinearity, dispersion and two-photon absorption figure of merit of three basic silicon-organic hybrid waveguide designs are compared. Four-wave mixing and heterodyne pump-probe measurements show that all designs achieve high nonlinearities. The fundamental limitation of two-photon absorption in silicon is overcome using silicon-organic hybrid integration, with a five-fold improvement for the figure of merit (FOM). The value of FOM = 2.19 measured for silicon-compatible nonlinear slot waveguides is the highest value published. (C) 2009 Optical Society of Americ