Frequency sorting in graded dispersive resonator arrays via volume-interaction matrices
Abstract
We study graded arrays of highly dispersive subwavelength resonators through their volume-potential matrix reduction. The reduction gives a finite-dimensional nonlinear resonance problem whose diagonal entries encode the local dispersive response and whose off-diagonal entries encode volume-mediated coupling between distinct resonators. We show that monotone material grading turns this matrix into an analytically controllable frequency sorter. When graded detuning dominates coupling in the reduced characteristic matrix, the characteristic vectors localize near individual resonators; under an explicit half-lattice-site localization condition, this localization becomes a monotone frequency-position map. We also prove a constructive inverse-design statement: prescribed monotone target frequencies can be realized by choosing the local dispersive parameters, with robustness under sufficiently small grading errors. Numerical experiments, whose parameters and algorithms are recorded in an appendix, illustrate localized resonances, designed frequency-position maps, disorder stability, spacing dependence, and a resolved physical Lippmann-Schwinger validation beyond the leading logarithmic quadrature model.
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BibTeX
@misc{alexopoulos2026frequency,
title = {{Frequency sorting in graded dispersive resonator arrays via volume-interaction matrices}},
author = {Konstantinos Alexopoulos},
howpublished = {HAL},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2609.29565},
eprint = {2609.29565},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05743831v1},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Frequency sorting in graded dispersive resonator arrays via volume-interaction matrices
AU - Konstantinos Alexopoulos
PY - 2026
DA - 2026/08/26
PB - HAL
DO - 10.48550/arxiv.2609.29565
UR - https://hal.science/hal-05743831v1
AB - We study graded arrays of highly dispersive subwavelength resonators through their volume-potential matrix reduction. The reduction gives a finite-dimensional nonlinear resonance problem whose diagonal entries encode the local dispersive response and whose off-diagonal entries encode volume-mediated coupling between distinct resonators. We show that monotone material grading turns this matrix into an analytically controllable frequency sorter. When graded detuning dominates coupling in the reduced characteristic matrix, the characteristic vectors localize near individual resonators; under an explicit half-lattice-site localization condition, this localization becomes a monotone frequency-position map. We also prove a constructive inverse-design statement: prescribed monotone target frequencies can be realized by choosing the local dispersive parameters, with robustness under sufficiently small grading errors. Numerical experiments, whose parameters and algorithms are recorded in an appendix, illustrate localized resonances, designed frequency-position maps, disorder stability, spacing dependence, and a resolved physical Lippmann-Schwinger validation beyond the leading logarithmic quadrature model.
ER -