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Dominance of Radiation Pressure in Ion Acceleration with Linearly Polarized Pulses at Intensities of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mn>10</mml:mn><mml:mn>21</mml:mn></mml:msup><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi mathvariant="normal">W</mml:mi><mml:mtext> </mml:mtext><mml:msup><mml:mi>cm</mml:mi><mml:mrow><mml:mo>โ</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:math>
A novel regime is proposed where, by employing linearly polarized laser pulses at intensities 10(21) W cm(-2) (2 orders of magnitude lower than discussed in previous work [T. Esirkepov et al., Phys. Rev. Lett. 92, 175003 (2004)]), ions are dominantly accelerated from ultrathin foils by the radiation pressure and have โฆ