Supersymmetry-enhanced stark-chirped rapid-adiabatic-passage in multimode optical waveguides

Area of Science:

• Optics and Photonics
• Quantum Control
• Waveguide Engineering

Background:

• Efficiently exciting higher-order modes in optical waveguides is crucial for advanced photonic devices.
• Existing methods often suffer from low fidelity or complex implementations.

Purpose of the Study:

• To propose and demonstrate a novel hybrid technique for high-fidelity mode pumping in multimode optical waveguides.
• To leverage Stark-Chirped Rapid Adiabatic Passage (SCRAP) and Supersymmetry (SUSY) for precise control over light propagation.

Main Methods:

• Implemented SCRAP by modulating the refractive index of a waveguide coupled to its SUSY partner.
• Utilized SUSY transformations to control supported modes within the waveguide system.
• Combined SCRAP and SUSY for efficient transfer of light from a fundamental to an excited mode.

Main Results:

• Achieved over 99% fidelity in pumping an excited mode of a two-mode waveguide.
• Demonstrated the capability of SCRAP for spatial separation of mode superpositions.
• Showcased improved performance for mode separation applications using SUSY.

Conclusions:

• The combined SCRAP-SUSY approach offers a highly efficient and controllable method for optical mode manipulation.
• This technique has significant potential for applications in optical signal processing and integrated photonics.