Short-Pulsed Metamaterials

Abstract

We study a class of temporal metamaterials characterized by time-varying dielectric permittivity waveforms of duration much smaller than the characteristic wave-dynamical timescale. In the analogy between spatial and temporal metamaterials, such a short-pulsed regime can be viewed as the temporal counterpart of metasurfaces. We introduce a general and compact analytical formalism for modeling the interaction of a short-pulsed metamaterial with an electromagnetic wavepacket. Specifically, we elucidate the role of local and nonlocal effects, as well as of the time-reversal symmetry breaking, and we show how they can be harnessed to perform elementary analog computing, such as first and second derivatives. Our theory, validated against full-wave numerical simulations, suggests a novel route for manipulating electromagnetic waves without relying on long, periodic temporal modulations. Just as metasurfaces have played a pivotal role in the technological viability and practical applicability of conventional (spatial) metamaterials, short-pulsed metamaterials may catalyze the development of temporal and space-time metamaterials.

6 pages, 4 figures

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Cited by in corpus (5)

• Observation of Temporal Reflections and Broadband Frequency Translations at Photonic Time-Interfaces
• Stationary Charge Radiation in Anisotropic Photonic Time Crystals
• Multiple actions of time-resolved short-pulsed metamaterials
• Diffraction Phenomena in Time-varying Metal-based Metasurfaces
• Inverse design of optical pulse shapes for time-varying photonics