Controlled generation of cylindrical vector vortex beams using an optically active material.

Area of Science:

• Optics and Photonics
• Materials Science

Background:

• Cylindrical vector vortex beams (CVVBs) are crucial for advanced optical applications.
• Generating tunable and efficient CVVBs remains a challenge.

Purpose of the Study:

• To propose and experimentally demonstrate an efficient method for generating tunable CVVBs.
• To utilize optically active (OA) materials for precise control over beam properties.

Main Methods:

• Employing an optically active material with varying concentrations to tune beam characteristics.
• Utilizing a spatial light modulator (SLM) with a single-phase profile at a low oblique incidence angle.
• Measuring two global parameters to quantify tunability and efficiency.

Main Results:

• Successful generation of tunable CVVBs demonstrated experimentally.
• Enhanced beam efficiency achieved through optimized SLM configuration.
• Quantitative tunability and efficiency validated by experimental measurements.

Conclusions:

• The proposed method provides an efficient and tunable approach for generating CVVBs.
• The use of OA materials offers a unique control mechanism for beam properties.
• This technique has potential applications in fabricating spiral nanostructures.