Stationary Charge Radiation in Anisotropic Photonic Time Crystals

Abstract

Time metamaterials exhibit a great potential for wave manipulation, drawing increasing attention in recent years. Here, we explore the exotic wave dynamics in an anisotropic photonic time crystal (APTC), formed by an anisotropic medium whose optical properties are uniformly and periodically changed in time. Based on a temporal transfer matrix formalism, we show that a stationary charge embedded in an APTC can emit radiation, in contrast to the case of an isotropic photonic time crystal, and its distribution in momentum space is controlled by the APTC band structure. Our approach extends the functionalities of time metamaterials, offering new opportunities for simultaneous radiation generation and control, with implications for both classical and quantum applications.

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Cited by in corpus (9)

• Photonic time crystals: Theory and applications
• Plasmonic Time Crystals
• Electron Scattering at a Potential Temporal Step Discontinuity
• Non-uniform wave momentum bandgap in biaxial anisotropic photonic time crystals
• Longitudinal optical phonons in photonic time crystals containing a stationary charge
• Broadband Dipole Absorption in Dispersive Photonic Time Crystals
• Geometry and Topological photonics
• Generalized Wigner-Smith theory for perturbations at exceptional and diabolic point degeneracies
• Non-Abelian gauge field optics in the time domain