Skip to content
DraconiticResearch
Search Sources API
203,203 studies31 sourcesUpdated 29 min ago
Peer-reviewedCC BYScience Advances

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

  • Puneet Garg1
  • Evangelos Almpanis2,3
  • L. Zimmer1
  • Jan David Fischbach4
  • Xuchen Wang5
  • M. S. Mirmoosa6
  • Markus Nyman4
  • N. Stéfanou3
  • N. Papanikolaou2
  • Viktar Asadchy7
  • Carsten Rockstuhl4,1
7 affiliations
  1. 1Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Kaiserstrasse 12, Karlsruhe 76131, Germany
  2. 2Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, Patriarchou Gregoriou and Neapoleos Str., Ag. Paraskevi, Athens 15310, Greece
  3. 3Section of Condensed Matter Physics, National and Kapodistrian University of Athens, Panepistimioupolis, Athens 15784, Greece
  4. 4Institute of Nanotechnology, Karlsruhe Institute of Technology, Kaiserstrasse 12, Karlsruhe 76131, Germany
  5. 5College of Physics and Optoelectronic Engineering, Harbin Engineering University, Nantong Street 145, Harbin 150001, China
  6. 6Department of Physics and Mathematics, University of Eastern Finland, Yliopistokatu 7, Joensuu 80101, Finland
  7. 7Department of Electronics and Nanoengineering, Aalto University, Maarintie 8, Espoo 02150, Finland
Open at sourceDOICite

Abstract

Photonic time crystals (PTCs) are characterized by the rapid modulation of the material properties in time, causing a momentum bandgap for light. However, the observation of these bandgaps at optical frequencies remains elusive as the necessary temporal modulation amplitudes to show notable momentum bandgaps are relatively high, inaccessible with available materials. While it has been known that structuring PTCs at the subwavelength scale can improve the bandgap size, we push this concept to the extreme by leveraging the nanophotonic toolbox. Specifically, we demonstrate that structures composed of scatterers supporting quasi-bound states in the continuum can substantially reduce the required modulation amplitudes by enhancing the interaction time between light and time-varying matter. This allows us to observe noticeable momentum bandgaps despite the weak temporal modulation. Our approach bridges the concepts of bound states in the continuum and time-varying metamaterials, paving the way toward realizable PTCs at optical frequencies.

Related

  1. Energy Exchange and Coherent Behavior of Monolayer TMD Polaritonic Systems in All-Dielectric Metasurfaces Supporting Quasi-Bound States in the Continuum
    Jiani Li, Tao Jiang, Ze Peng +2
    Nanomaterials (Basel, Switzerland)Peer-reviewedCC BYFull textMaterials & polymersEurope PMC
  2. Polarization-Robust and Electrically Tunable Quasi-Bound States in the Continuum in C4-Symmetric Terahertz Metasurfaces for Refractive-Index Sensing
    Mingyu Geng, Qinghua Wang, Yunjing Ji +2
    NanomaterialsPeer-reviewedCC BY 4.0Materials & polymersCrossref
  3. Ultrahigh-Q Topological Mirror Heterostructure for High-Resolution Thermal Sensing in One-Dimensional Photonic Crystals
    Mohamed Saleh M. Esmail, Yassine Bouazzi, Mabrouk Touahmia +2
    NanomaterialsPeer-reviewedCC BY 4.0Materials & polymersCrossref
  4. Dual-mode terahertz metasurface sensor integrating a high-Q quasi-bound state in the continuum and a guided-mode resonance
    ting zhang, Fushun Nian, haodong xu +1
    Optics ExpressPeer-reviewedLicence not statedMaterials & polymersCrossref
  5. Czochralski Growth of YSGAG Crystals: Experimental, Numerical, and Data-Assisted Analysis of Solid–Liquid Interface Shape
    Kunal Meshram, Dorota Pulmannová, Roberts Blukis +3
    ChemRxivPreprintLicence not statedGeneral chemistryChemRxiv

Cite

BibTeXRIS
BibTeX
@article{garg2026photonic,
  title = {{Photonic time crystals assisted by quasi-bound states in the continuum}},
  author = {Puneet Garg and Evangelos Almpanis and L. Zimmer and Jan David Fischbach and Xuchen Wang and M. S. Mirmoosa and Markus Nyman and N. Stéfanou and N. Papanikolaou and Viktar Asadchy and Carsten Rockstuhl},
  journal = {Science Advances},
  year = {2026},
  month = aug,
  doi = {10.1126/sciadv.aed4055},
  url = {https://doi.org/10.1126/sciadv.aed4055},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Photonic time crystals assisted by quasi-bound states in the continuum
AU  - Puneet Garg
AU  - Evangelos Almpanis
AU  - L. Zimmer
AU  - Jan David Fischbach
AU  - Xuchen Wang
AU  - M. S. Mirmoosa
AU  - Markus Nyman
AU  - N. Stéfanou
AU  - N. Papanikolaou
AU  - Viktar Asadchy
AU  - Carsten Rockstuhl
PY  - 2026
DA  - 2026/08/12
JO  - Science Advances
DO  - 10.1126/sciadv.aed4055
UR  - https://doi.org/10.1126/sciadv.aed4055
AB  - Photonic time crystals (PTCs) are characterized by the rapid modulation of the material properties in time, causing a momentum bandgap for light. However, the observation of these bandgaps at optical frequencies remains elusive as the necessary temporal modulation amplitudes to show notable momentum bandgaps are relatively high, inaccessible with available materials. While it has been known that structuring PTCs at the subwavelength scale can improve the bandgap size, we push this concept to the extreme by leveraging the nanophotonic toolbox. Specifically, we demonstrate that structures composed of scatterers supporting quasi-bound states in the continuum can substantially reduce the required modulation amplitudes by enhancing the interaction time between light and time-varying matter. This allows us to observe noticeable momentum bandgaps despite the weak temporal modulation. Our approach bridges the concepts of bound states in the continuum and time-varying metamaterials, paving the way toward realizable PTCs at optical frequencies.
SN  - 2375-2548
ER  -