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Arbitrary Pulse Shaping using Accelerated Interfaces
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DOI：10.1002/sstr.202500340.png)
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Abstract
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A novel method for arbitrary pulse shaping is proposed, based on nonuniform Doppler shifts induced by an accelerated perfect electric conductor (PEC) interface. Unlike conventional pulse-shaping techniques, which rely on spectral filtering or nonlinear effects, the approach leverages the controlled motion of an interface to directly reshape the temporal envelope of an optical pulse. The method begins by deriving the exact scattering relations for an arbitrarily moving PEC interface and solving the inverse problem to determine the required trajectory that transforms a given input pulse into a desired waveform. Validation is provided through illustrative examples, demonstrating its ability to reshape Gaussian pulses into various target profiles, including modulated, rectangular, and asymmetric waveforms. Theoretical predictions are further confirmed via finite-difference time-domain simulations.
Keywords:
metamaterials
pulse shaping
space-time metamaterials
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