Efficient control of a 3D optical mode using a thin sheet of transformation optical medium

Area of Science:

• Photonics and Optical Engineering
• Materials Science
• Nanotechnology

Background:

• Silicon-on-insulator (SOI) technology is crucial for integrated photonics.
• Efficient mode conversion between waveguides of varying dimensions is a key challenge.
• Controlling light propagation in optical circuits requires advanced device designs.

Purpose of the Study:

• To design and simulate a mode adapter for SOI waveguides with different widths.
• To investigate the use of controlled anisotropic materials for light manipulation.
• To demonstrate a method for controlling energy flow in silicon photonic devices.

Main Methods:

• Device design utilizing two-dimensional embedded coordinate transformation.
• Integration of a thin anisotropic material layer on a silicon slab.
• Three-dimensional full-wave electromagnetic simulations to analyze light propagation.
• Exploration of planar optical metamaterials for implementation.

Main Results:

• The anisotropic material layer effectively controls energy flow in the Si slab.
• Successful simulation of light transition between SOI waveguides of different widths.
• Validation of the design through rigorous 3D full-wave simulations.
• Demonstration of the adapter's functionality in guiding light.

Conclusions:

• The proposed mode adapter offers efficient light transition in SOI waveguides.
• Anisotropic metamaterials provide a viable route for controlling guided optics.
• This technology has potential applications in various integrated optical systems.
• The design is compatible with planar fabrication techniques for scalability.