Experimental Observation of Time-Domain Bound States in The Continuum
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914464993902592 |
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| author | Manzoor, Zahra Schiller, Oded Plotnik, Yonatan Segev, Mordechai Peroulis, Dimitrios |
| author_facet | Manzoor, Zahra Schiller, Oded Plotnik, Yonatan Segev, Mordechai Peroulis, Dimitrios |
| contents | Bound states in the continuum (BICs) are spatially localized eigenmodes that remain perfectly confined even though their energies reside within a continuum of radiating modes. BICs were predicted in 1929, but their experimental realization awaited more than 8 decades. Following their experimental observation, BICs were explored in a variety of wave systems, and found to exhibit a plethora of fundamental features such nontrivial topology and extremely high Q-factor. Recently, with foundational advances in the new field of electromagnetic waves in time-varying media, BICs were predicted to exist in the time domain, with their wavenumber embedded in a continuum of unbound momentum modes. Here, we present the first experimental realization of the time-domain Bound States in the Continuum. We use a transmission-line network with a time-modulated wave-impedance and show that a sinusoidal wave launched into the network naturally evolves into a time-domain BIC with a well-defined peak and decaying-oscillating tails. We show that the time-domain BIC is anti-symmetric despite the symmetric nature of the modulation. These experiments pave the way for exploring new phenomena in the fields of BICs and time-varying wave-systems in nonconservative regimes where time-translation symmetry is broken. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_10111 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Experimental Observation of Time-Domain Bound States in The Continuum Manzoor, Zahra Schiller, Oded Plotnik, Yonatan Segev, Mordechai Peroulis, Dimitrios Optics Applied Physics Quantum Physics Bound states in the continuum (BICs) are spatially localized eigenmodes that remain perfectly confined even though their energies reside within a continuum of radiating modes. BICs were predicted in 1929, but their experimental realization awaited more than 8 decades. Following their experimental observation, BICs were explored in a variety of wave systems, and found to exhibit a plethora of fundamental features such nontrivial topology and extremely high Q-factor. Recently, with foundational advances in the new field of electromagnetic waves in time-varying media, BICs were predicted to exist in the time domain, with their wavenumber embedded in a continuum of unbound momentum modes. Here, we present the first experimental realization of the time-domain Bound States in the Continuum. We use a transmission-line network with a time-modulated wave-impedance and show that a sinusoidal wave launched into the network naturally evolves into a time-domain BIC with a well-defined peak and decaying-oscillating tails. We show that the time-domain BIC is anti-symmetric despite the symmetric nature of the modulation. These experiments pave the way for exploring new phenomena in the fields of BICs and time-varying wave-systems in nonconservative regimes where time-translation symmetry is broken. |
| title | Experimental Observation of Time-Domain Bound States in The Continuum |
| topic | Optics Applied Physics Quantum Physics |
| url | https://arxiv.org/abs/2604.10111 |