What question did this study set out to answer?

To overcome the high modulation amplitude threshold required to observe momentum bandgaps in optical photonic time crystals by enhancing light-matter interaction time.

August 14, 2026Science AdvancesOpen Access

Photonic time crystals assisted by quasi-bound states in the continuum

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Authors

PGPuneet GargKarlsruhe Institute of Technology EAE. AlmpanisNational and Kapodistrian University of Athens LZL. ZimmerKarlsruhe Institute of Technology

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Implication

Nanophotonic modeling demonstrates momentum bandgap enhancement in optical time crystals via quasi-bound states in the continuum, indicating a feasible path toward optical realization.

Key Points

To overcome the high modulation amplitude threshold required to observe momentum bandgaps in optical photonic time crystals by enhancing light-matter interaction time.
Designed subwavelength nanophotonic architectures using scatterers that support quasi-bound states in the continuum.
Coupled time-varying material property modulations with high-confinement optical resonances to amplify interaction duration.
Substantially reduced the modulation amplitude threshold necessary to induce observable momentum bandgaps for light.
Achieved noticeable optical momentum bandgaps despite operating under weak temporal modulation amplitudes.

Cite This Study

Garg et al. (2026) studied this question.

synapsesocial.com/papers/6a7ec69fb70b84ec8b912bee https://doi.org/10.1126/sciadv.aed4055

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Implication

Nanophotonic modeling demonstrates momentum bandgap enhancement in optical time crystals via quasi-bound states in the continuum, indicating a feasible path toward optical realization.

Photonic time crystals assisted by quasi-bound states in the continuum

Discussion

Member takes

Implication

Key Points

Cite This Study

Photonic time crystals assisted by quasi-bound states in the continuum

Discussion

Member takes

Implication

Key Points

Cite This Study

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