8 years ago
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Engineers Stumble on a Whole New Method of Laser-Based Spacecraft Propulsion
A team of Chinese physicists has developed a new variety of light-based propulsion system with the ability to harness much greater forces than a conventional solar sail. The key, according to the Nankai University-based group, is in swapping out the mirrored sail—which captures photonic energy as radiation pressure in much the same way a regular air-sail captures wind energy—for a pure-black graphene sponge.
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That makes a lot of sense. Rather than reflecting and redirecting the light emissions you're absorbing and thus the full kinetic potential.