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arXiv · 2206.10052

Theory of Radiation Pressure on a Diffractive Solar Sail

Grover A. Swartzlander Jr
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Abstract

Solar sails propelled by radiation pressure enable space missions that cannot be achieved using chemical rockets alone. Significant in-space propulsion for missions such as a solar polar orbiter may be achieved with a sail that deviates sunlight at a large average angular direction. The momentum transfer efficiency of sunlight diffracted from a sun-facing diffractive sail comprised of periodic sawtooth prism elements is examined here. The spectrally averaged efficiency is found to approach that of a monolithic prism when the grating period is much longer than the peak of the solar spectrum. This idealized diffraction analysis predicts a greater transverse radiation pressure force compared to an idealized reflective sail. With modern optical design and fabrication techniques, diffractive solar sails may one day replace reflective sails.

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Grover A. Swartzlander Jr. 2022-06-21. Theory of Radiation Pressure on a Diffractive Solar Sail. https://doi.org/10.1364/josab.468588

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