Adiabatic frequency shifting in epsilon near zero materials: The role of group velocity

Abstract

We investigate adiabatic frequency conversion using epsilon near zero (ENZ) materials and show that while the maximum frequency conversion for a given change of permittivity does not exhibit increase in the vicinity of ε=0 condition. However, that change can be achieved in a shorter length, and if the pump is also in the ENZ vicinity, at a lower pump intensity. This slow propagation effect makes the conversion efficiency in the ENZ material comparable to that in microresonators and other structured slow light schemes, but unlike the latter no nanofabrication is required for ENZ materials which constitutes their major advantage over alternative frequency conversion approaches.

References in corpus (8)

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• Epsilon-Near-Zero Al-Doped ZnO for Ultrafast Switching at Telecom Wavelengths: Outpacing the Traditional Amplitude-Bandwidth Trade-Off
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• Ultratunable quantum frequency conversion in photonic crystal fiber
• Spin-controlled photonics via temporal anisotropy
• Temporal refraction and reflection in modulated mechanical metabeams: theory and physical observation
• Observation of SQUID-like behavior in fiber laser with intra-cavity epsilon-near-zero effect
• Solvated electrons in polar liquids as epsilon-near-zero materials tunable in the terahertz frequency range
• Resonant states of structured photonic time crystals
• Frequency Domain Berry Curvature Effect on Time Refraction
• Fast and slow nonlinearities in ENZ materials