Elyvris
OPTICAL ANAPOLES
Fields and timing
in TiO₂.
A field-cycle reference and published timing samples from the study of UV-A anapoles.
The electric anapole condition
Electric and toroidal moments cancel their combined leading dipole radiation term while both moments remain non-zero. Other multipoles can still radiate.
Poeta et al. (2024), Eq. (1), using the paper’s Cartesian moment convention.
3D Meep reference: 190 × 160 × 100 nm TiO₂ in air at 366.5 nm. The central x–y plane shows one steady-state optical cycle on fixed E/H scales.
Optical constants: Jolivet et al. (2023), amorphous ALD TiO₂ deposited at 200 °C: n = 2.8081, κ = 0 at 366.5 nm, from refractiveindex.info.
Calculation, data and scope
The tabulated optical constants are linearly interpolated in wavelength without extrapolation. This calculation holds ε = n² as a real constant at the selected frequency; it does not model broadband dispersion or the paper’s transient formation. Both E and H use the same reconstructed optical phase. The mesh is 6.67 nm at z = 0, with separate fixed display scales. The field map alone does not establish an anapole condition.
Numerical methods ↗Convergence checks ↗Meep source ↗Complex-field data ↗Optical-constant table ↗Anapole formation: electric and magnetic timing
Published electric and magnetic samples at distinct times.
Scroll the timeline horizontally to inspect the time spacing ↔
Instance 1 · sample 1 · pair 1 / 14
Fourteen published pairs across four instances, with E/H offsets of 0.26–0.32 fs. The cursor scans reported events; it does not reconstruct the fields above.
Timing data and source
Data: D. Poeta, R. Vilarinho, M. López-García and P. A. A. De Beule, Optical anapoles excited by UV-A illumination, Optics Letters 49(24), 7198–7201 (2024), article DOI ↗; Supplement 1, Fig. S2, version 5 ↗, CC BY 4.0 ↗. Code, data and methods ↗.
Open data: all fourteen reported time pairs
| Instance / sample | tE (fs) | tH (fs) | Δt (fs) | |E|² / |E₀|² |
|---|