Chongfan Technology
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06
2026
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08
Plasma Metamaterial Time Crystal
Author:
The team of Yannis Laplace at École Polytechnique has demonstrated an all‑optical realization of a photonic time crystal, implemented using a terahertz‑frequency surface plasmon cavity metamaterial. The authors show that by field‑induced dynamic modulation of the carriers’ kinetic energy and effective mass—up to 80% of their rest mass—they can achieve strong (approaching unity) and coherent (sub‑optical‑cycle) periodic driving of the plasmonic metamaterial. Spectroscopic measurements reveal that, at a singularity where two Floquet‑driven optical eigenmodes coalesce, the system undergoes a transition into a pulsed time crystal (PTC) state. In this PTC state, emergent gain reduces plasmonic losses by more than 50%, and the authors predict that plasmonic lasers could be realized experimentally. These findings establish a robust platform for time‑domain photonics in plasmonic systems.
The research findings were published in Nature on July 29, 2026, under the title “Plasmonic metamaterial time crystal.”
Figure 1: Concept and Experimental Realization of PTC
Figure 2: Experimental results and comparison with the theoretical model
Figure 3: Spectrum of PTC
Figure 4: Time Transition to the PTC State and Stability of the Drive System
Source: Optics World
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