We present a novel and simple method to generate frequency-multiplexed multiple terahertz vortex beams using a combination of a spiral phase plate and a binary transmission mask. This approach enables… Click to show full abstract
We present a novel and simple method to generate frequency-multiplexed multiple terahertz vortex beams using a combination of a spiral phase plate and a binary transmission mask. This approach enables the transformation of a broadband Gaussian THz beam into multiple vortex beams with different topological charges, paving the way for advanced THz communication and information processing applications. Our experimental demonstration confirms the successful generation of single and multiple THz vortex beams, with topological charges ranging from 1 to 3, supported by numerical simulations.
Journal Title: Applied Physics Letters
Year Published: 2025
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